Navigation Links
New salts for chemical soups

In order to meet future demands for new pharmaceuticals, innovative materials and agricultural pesticides, the chemical industry is dependent on the ongoing development of effective methods for the synthesis of complex organic compounds. Because they are so versatile, organometallic molecules are of special significance in this context. Among these, reagents containing zinc atoms have certain advantages over the corresponding organolithium or -magnesium compounds, as they are compatible with a broader array of functional groups. LMU chemists led by Professor Paul Knochel have now developed a simple "one-pot" method for the economical synthesis of organozinc pivalates. Up until now, such functionalized organozinc compounds were only available in liquid form, and were difficult to transport and store due to their susceptibility to degradation upon contact with air or moisture. The new synthetic route permits their formation as salt-stabilized solids, which can easily be recovered in powder form. "In this form, the reagents can be stored in an argon atmosphere for months without loss of activity," says Knochel. "They can even be exposed to air for short periods without risk of degradation or ignition." (Angewandte Chemie International Edition, early view, August 24, 2011)

One of the most prominent applications for organozinc reagents is their use for the so-called Negishi cross-coupling, a type of reaction that provides a simple means of linking carbon atoms together in a virtually unlimited variety of ways, and earned its discoverer a share of the Nobel Prize for Chemistry in 2010. "The new class of organozinc pivalates makes it possible to employ different solvents in the Negishi cross-coupling reaction and greatly extends the spectrum of coupling partners it can be applied to," says Sebastian Bernhardt, who is the lead author on the new study. "The new reagents contain magnesium salts, which also facilitate the addition of organozinc pivalates to carbonyl groups." This opens the way to their use for a whole series of applications relevant to the industrial manufacture of fine chemicals. The new scheme for synthesis of these compounds is the subject of an international patent application. (suwe)


Contact: Dr. Kathrin Bilgeri
Ludwig-Maximilians-Universitt Mnchen

Related medicine news :

1. Hallucinogens Legally Sold as Bath Salts a New Threat
2. Scientists develop new approaches to predict the environmental safety of chemicals
3. Brain chemical may explain why heavy smokers feel sad after quitting
4. Exposure to Common Chemicals May Affect Thyroid Function
5. PXR: A stepping stone from environmental chemical to cancer?
6. Bodys natural marijuana-like chemicals make fatty foods hard to resist
7. Chemical produced in pancreas prevented and reversed diabetes in mice
8. Early Chemical Exposures May Affect Breast Health: Report
9. News media registration opens for American Chemical Society National Meeting
10. Chemical Found in Foam Cups a Possible Carcinogen
11. Researchers discover biochemical weakness of malaria parasite -- vaccine to be developed
Post Your Comments:
(Date:11/30/2015)... ... November 30, 2015 , ... Newly reviewed and approved “NJ ... graduated from Tufts School of Dental Medicine in 1935. His father graduated from ... family being in dentistry as well as their commitment and passion to the Practice ...
(Date:11/30/2015)... ... November 30, 2015 , ... The ... National Poison Data System (NPDS) reveals that in 2014, someone called a poison ... over two million of which were human exposure cases. , The American Association ...
(Date:11/30/2015)... ... , ... Two years ago, Debbie Gregory, the CEO of, found herself ... Meditation (TM). After encouraging a number of veterans to go through the program, ... the talk. , TM is becoming one of the best alternative treatments for Post-Traumatic ...
(Date:11/30/2015)... ... ... The American Society for Clinical Pathology (ASCP) announced today that it has launched ... ASCP shared its “Give a minute. Get tested. Find a cure.” icon and infographic ... tested for HIV. , ASCP has asked members to replace their Facebook, Twitter, or ...
(Date:11/30/2015)... Beach, FL (PRWEB) , ... November 30, 2015 ... ... of Consumer Reports magazine, quoted Michael Hansen, Ph.D., a senior scientist at Consumer ... and even more so for a child’s exposure limits. , The original Nov ...
Breaking Medicine News(10 mins):
(Date:11/30/2015)... REHOVOT, Israel , Nov. 30, 2015 ... focused on acquiring and developing innovative therapies for ear, ... of Keith A. Katkin as chairman of ... Flesher , chief executive officer for OticPharma, Ltd.  "Keith ... As chairman, he will be able to share this ...
(Date:11/29/2015)...  Strengthening its leadership in connected healthcare informatics, ... IntelliSpace Portal 8.0 , the latest edition of ... helps radiologists detect, diagnose and follow-up on treatment of ... North America Annual Meeting (RSNA) in ... the changing demands in radiology that result from an ...
(Date:11/29/2015)... GE Health Cloud 1 was unveiled today at the ... America (RSNA) meeting in Chicago ... ecosystem and its applications will connect radiologists and clinicians to ... – both inside and outside the hospital setting. ... the digital industrial leader, we are betting big on the ...
Breaking Medicine Technology: