News

Enamine Ltd, together with Elsevier, ChemSpace SIA, Institute of Organic Chemistry of National Academy of Sciences of Ukraine, and Kyiv Institute of Bioorganic Chemistry and Petrochemistry of National Academy of Sciences of Ukraine, are co-organizing The 18th European Symposium on Fluorine Chemistry to be held on August 7 - 12, 2016 in Hotel Ramada Encore Kyiv, Ukraine. Early bird registration for the event is now open for industrial and academic participants from around the world. Student participation is possible.

This year’s Symposium is a continuation of a long tradition of gathering research and industrial leaders in the field of fluorine science from all around the globe in order to discuss modern trends in fluorine research, present latest achievements and breakthroughs. The scope of the event will include application of fluorine in areas of drug discovery, material science, agrochemistry, energy storage and many others.

The main sub-sections are as following:

• Organic and Bio-Organic Fluorine Chemistry,
• Inorganic Fluorine Chemistry,
• Physical Fluorine Chemistry
• Industrial and Polymer Fluorine Chemistry.
• Other Areas of Fluorine Science

All interested industrial and academic organizations, individual scientists and students are welcome to register for participation in this year’s leading event on Fluorine.

Mykhailiuk, P. K. Generation of C₂F₅CHN₂ In Situ and Its First Reaction: [3+2] Cycloaddition with Alkenes Chem. Eur. J. 2014, 17, 5168. (Back Cover Picture)

Ritter, S. K. Diazoalkane Expands Fluorine Focus On Ethyl Groups Chemical & Engineering News, 92 (17), 2014.

Developing new methods for introducing fluorine into complex organic molecules has been all the rage during the past few years. Researchers preparing drug candidates and crop-protection chemicals typically seek to add a single fluorine atom or trifluoromethyl group and now have myriad ways to do so. But methods for adding longer, more lipophilic perfluoroalkyl groups, such as pentafluoroethyl, –C₂F₅, to complex molecules are relatively scarce. The approaches tend to be direct additions of C₂F₅ using organometallic transfer reagents and don’t utilize C₂F₅-containing building blocks.

Enamine scientists have developed a new building block for introducing C₂F₅ group into organic molecules. Pavel Mykhailiuk and colleagues safely generated the fluorinated diazoalkane, C₂F₅CHN₂, in situ from C₂F₅CH₂NH₂•HCl and NaNO₂. Authors demonstrated the utility of the reagent by using it in [3 + 2]-cycloadditions with mono- and disubstituted alkenes at room temperature to prepare perfluoroethylated pyrazolines with better than 95% conversion rates. Authors believe the diazofluoroalkane will also be as useful as other diazoalkanes for cyclopropanations, carbene insertions, and alkyne cycloadditions.

336 Azides and alkynes have been selected from Enamine’s catalog of over 90 000 Building Blocks. Their structures have been published in the Selected Building Block series. This brochure, the sixth in series, provides a useful guide to novel and innovative chemistry developed at Enamine that can find multiple applications in drug design. Cycloaddition reaction of azides and alkynes has been shown to smoothly provide excellent yields of 1,2,3-triazoles. It has been recognized as an outstanding example of “click chemistry” This reaction can be used to selectively synthesize both 1,4- and 1,5-substituted triazoles. Besides reaction with azides alkynes undergo many other cycloaddition reactions.

The new version of EnamineStore provides enhanced functionality to quickly search and purchase from catalogs of Enamine and UORSY (collectively over 10 million compounds). The following improvements have been realized besides changes in general form layouts:

Search functionality

• one search form with multiple usage modes for both easy and advanced queries introduced;
• JME replaced with Marvin JavaScript drawing tool, allowing to draw structures for queries conveniently in all modern web-browsers instead of resource-consuming Java applet;
• support of advanced query features introduced (multiple fragments, lists of atoms, generic query atoms, etc.);
• structure can be imported directly into the query editor;
• structural search history kept for the session;
• search by any supported structure identifier (Enamine catalog number, CAS/ ACD number or chemical name) or their list instantly introduced;
• new additional parameters can be added to building block queries: price limit and regional stock availability;
• found structures can be refined with a consecutive search using two different modes.

Catalog

• one-click search of close analogs, relevant by functional groups introduced;
• one-click transfer of structure to query builder introduced;
• building block prices visible directly in catalog (no need to put an item to cart to check price);
• transport conditions data added;
• added data export in tabular form (.csv format), export-related bugs fixed;
• information provided in a more user-friendly manner;
• consistent handling of screening compounds featuring multiple batches with different salt parts introduced.

Cart

• any item can be purchased in multiple different batches;
• salt part may be selected for screening compounds (whenever option available);
• inquiries for out-of-stock items are handled through cart and checkout as a part of ordering process.

Recently several new features were made available to users of EnamineStore:

• card payments are enabled for all pending invoices issued by Enamine for both on-line and off-line orders – now it is possible to securely pay any outstanding invoice with credit card in the Billing section
• storage conditions, regional stock availabilities, MDL reference numbers and chemical names are displayed for Building Blocks
• lists of MDL numbers can be searched using the Search Wizard
• sample certificates of analysis and material safety data sheets for building blocks can be downloaded from the catalog instead of plain analytical data provided before
• Rush delivery can be requested for a building block being ordered on-line (subject to regional availability)

Enamine announces opening of contract biology laboratory at its main research site in Kyiv, Ukraine. Enamine’s BioLab will be providing ADMET (absorption, distribution, metabolism, excretion and toxicity) and biomolecular screening services to expand Enamine’s chemistry-driven CRO capabilities into the biological support of early phase drug discovery projects.
Integration of the newly created contract biology lab with Enamine’s internationally renowned synthetic chemistry powerhouse and the vast screening compound repository creates a perfect combination for providing efficient and cost-competitive drug discovery services to the international pharmaceutical and biotech industry.

Solid-Phase Peptide Synthesis was launched by Enamine with a new PS3 Peptide synthesizer (Protein Technologies, Inc.). Small linear and cyclic peptides comprising 2 to 25 amino acid residues of both natural and unnatural origin can be prepared on 1-30 mg scale in a highly pure form (>95%). A large collection of proprietary unnatural amino acids including many conformationally constrained ones as well as ones containing fluorine substituents can be used to expand the variety of peptides. The example structures of peptides prepared with our new peptide synthesizer are listed below.

CF3-Labeled Gramicidin-S analogue ( Angew.Chem., Int. Ed. Engl . 2006 , 45 , 5659-5661)	Cell-penetrating peptide SAP-E ( ChemBioChem 2011, 12 , 896-903)
CF3-Labeled SAP analogue ( Angew. Chem. Int. Ed. 2008 , 47 , 5765 –5767 )

Recently Enamine has further improved the high-throughput synthesis workflow used for preparation of compounds offered through the REAL Database. Removal of production bottlenecks, application of optimized technological solutions and expansion of high performance preparative flash chromatography unit allowed us to shorten entire production cycle to 12-14 days. Currently we are able to produce up to 2,000 samples per month using this optimized procedure. 90% feasibility rate can be achieved after a single production cycle for typical compound sets. Compounds synthesized via the enhanced scheme can be delivered within 3 weeks after acceptance of an order.

As from October 2010 Enamine provides access to NMR and LC/MS data for stock compounds through EnamineStore on-line service. Available spectral data for a compound of interest can be downloaded in PDF format by clicking the "Download spectral data" link located in the "Details" dialog accessible from the catalog section (search results). The analytical data can be accessed by registered users only.

Starting from January 2010, Enamine starts offering screening compounds via three separate libraries: Advanced, HTS and Historical collection. Advanced collection will always contain only novel and recently synthesized compounds, thus clients who persistently monitor additions to Enamine stock will spend less time and efforts to find new structural motifs. HTS collection will continue to be an indispensable source of compounds for various screening needs, providing unparalleled choice of diverse chemotypes. Historical collection will contain compounds representing scientific heritage of major regional research groups and institutions, particularly interesting for research programs in agro-chemistry and material science.

Nature Scientific Report “Identification of potential inhibitors based on compound proposal contest: Tyrosine-protein kinase Yes as a target”

Compound proposal contest has been held at Tokyo Institute of Technology (Japan) on January 7 - March 20 2014 in a form of open innovation competition. Organized by the Initiative for Parallel Bioinformatics (IPAB) and supported by Enamine, it was aimed at identification of novel approaches for Computer Aided Drug Discovery (CADD) and finding novel unique hit molecules.

Enamine provided its world’s largest Screening Collection as a source of diverse compounds for the contest participants, who were instructed to select a maximum of 1 200 prioritized compounds towards a specific biological target - Tyrosine-protein kinase Yes. The contest resulted into 600 unique molecules selected by jury, from which 27 inhibitors were identified, yielding finally 7 potential hits.

Enamine’s Screening Compounds Collection is a unique product offering containing more than 2 000 000 diverse and distinct compounds in significant amounts (typically, 150 mg in stock).

Controlling Biological Activity with Light: Diarylethene-Containing Cyclic Peptidomimetics
Oleg Babii, Sergii Afonin, Marina Berditsch, Sabine Reisser, Pavel K. Mykhailiuk, Vladimir S. Kubyshkin, Thomas Steinbrecher, Anne S. Ulrich and Igor V. Komarov
Angewandte Chemie International Edition 2014 53 (13), 3392–3395

Enamine scientists in collaboration with research at Karlsruhe Institute of Technology (KIT, Germany) published a study on antibiotics activated by light. It deals with synthesis of analogues of the antimicrobial peptide gramicidin S which conformations can be switched by light. This property was rendered by incorporation in its structure of an amino acid designed based on a photoisomerizable diarylethene scaffold. The biological activity of the resulting peptidomimetics can be reversibly controlled by ultraviolet/visible light.

Success of Enamine’s innovative product pipeline and service portfolio is based on the commitment of the company to the scientific research. Enamine caries out and supports research projects within the company as well as off-site in collaboration with many academic centers in Ukraine and abroad. About 30 scientific papers were published by Enamine scientists in renowned scientific journals in 2013.

With development of on-line chemical directories acquiring necessary reagents and building blocks for day-to-day research activity has become a technical routine. Many thousands of building blocks are now available in the market and sub-structure search can efficiently provide a selection of reagents to buy. However, this approach might be limited. With over 80,000 building blocks synthesized and now available from our stock we are a recognized leader in the market. Our catalog features versatile building block classes and adds 1,000 products each month. Although they all are available for purchase through EnamineStore and many public or corporate chemical databases we wanted to gather together the most interesting and recently prepared building blocks to provide a series of useful guides to a novel and innovative chemistry. First five brochures have been published to highlight our rich collections of Advanced Morpholine Analogues, Bicyclic Aliphatic Amines, Fluorinated Aliphatic Amines, Isocyanates, Isothiocyanates, and Trifluoroethyl Carbamates, and Sulfonyl Chlorides and other Sulfonylating Agents.

Four Ukrainian students won respectively three Gold medals and one Bronze medal at the 45th Chemistry Olympiad held in Moscow on July 15-24, 2013.
The Ukrainian Team competed against 291 students from 73 countries.

Members of Ukrainian Olympic team:

Andriy Stelmakh, Lviv Physics and Mathematics Lyceum – Gold Medal
Oleksandr Vyhivsky, Kharkiv school # 47 – Gold Medal
Mykyta Onizhuk, Kharkiv technical school # 173 – Gold Medal
Khrystofor Khokhlov, Kiev school # 145 – Bronze Medal

Enamine is continuously aiming towards excellence, in its organization, products & services. The company is proud of the achievement of the Ukrainian team and to have sponsored its national team. Sponsoring such event is a natural initiative from Enamine and we would like to warmly congratulate the four students for their results.

Source: Korresponsent.net

Enamine Ltd concluded an agreement with Legend Star International Co., to further promote products offered by Enamine to Taiwan drug discovery market. It is expected, that Taiwanese customers will be getting all relevant information on Enamine compounds and services from the local distributor and will benefit from improved service. Clients from Taiwan are encouraged to contact Legend Star International Co., Ltd. for all questions related to purchase of Enamine products:
1F., No.166, Fuxing 3rd St.,
Taishan Township, Taipei, Taiwan,
Mr. Chen Tsung-Ting
Tel: 886-2-29003199 (Ext 20)
Fax: 886-2-29009912
E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Enamine is planning to change the numbering of products offered through screening collections in 2012. To facilitate compound tracking in different offerings and allow transparent identification of structures by their unique ID throughout various databases, the old identification method utilizing lot-related T-numbers will be ceased. According to the new identification system all structures referring to compounds offered by Enamine for screening will have unique Z-codes familiar to those who worked with REAL Database before. Existing T-codes will be supported for ordering purposes.

Over 51,000 low  molecular weight reagents are now available from our stock. To the best of our knowledge, with this amount of substances the company has become the world’s largest supplier of physically available building blocks. The considerable improvement of synthetic technologies at Enamine is pushing the limits of the stock update rate. Currently over 1,000 building blocks are added to the stock every month.

EnamineStore at www.enaminestore.com was completely updated – both content and interface were affected by following changes:

• new products added to catalog: except for stock Screening Compounds and Building Blocks now it is possible to search, browse and order feasible screening compounds (REAL DB) and Tangible Building Blocks
• new search features: one-click 'Find Analogs' option, advanced search wizard, search by a list of CAS numbers and more
• tracking and current statuses for orders placed on-line
• supplemental data on stock compounds updated in catalog
• new look of catalog and cart pages, color coding for compounds in different categories

Price of over 9 000 building blocks was reduced by 50% on average. Selected compounds were discounted by as much as 80%! The products affected by price reduction conform to high quality standards of Enamine and are available from stock. Over 1 500 building blocks from this set are also available for rush delivery in 1g batches. You can download the set of discounted building blocks as SDF, ISIS DB or PDF. Please visit EnamineStore to check current stock availability and order on-line.