Palladium-Catalyzed α-Arylation of Carboxylic Acids and Secondary Amides via a Traceless Protecting Strategy
作者:Zhi-Tao He、John F. Hartwig
DOI:10.1021/jacs.9b03291
日期:2019.7.31
for the long-standing challenge of conducting the palladium-catalyzed α-arylation of carboxylic aids and secondaryamides with aryl halides. Both of the presented coupling processes occur with a variety of carboxylic acids and amides and with a variety of aryl bromides containing a broad range of functional groups, including base-sensitive functionality like acyl, alkoxycarbonyl, nitro, cyano, and even
Deaminative Arylation of Amino Acid-derived Pyridinium Salts
作者:Megan E. Hoerrner、Kristen M. Baker、Corey H. Basch、Earl M. Bampo、Mary P. Watson
DOI:10.1021/acs.orglett.9b02643
日期:2019.9.20
A Suzuki–Miyaura cross-coupling of α-pyridinium esters and arylboroxines has been developed. Combined with formation of the pyridiniumsalts from amino acid derivatives, this method enables amino acid derivatives to be efficiently transformed into α-aryl esters and amides. Under the mild conditions, broad functional group tolerance on both the amino acid derivatives and the arylboroxine are observed
Nickel-Catalyzed Reductive Carboxylation of Styrenes Using CO<sub>2</sub>
作者:Catherine M. Williams、Jeffrey B. Johnson、Tomislav Rovis
DOI:10.1021/ja8062925
日期:2008.11.12
A nickel-catalyzed reductive carboxylation of styrenes using CO2 has been developed. The reaction proceeds under mild conditions using diethylzinc as the reductant. Preliminary data suggests the mechanism involves two discrete nickel-mediated catalytic cycles, the first involving a catalyzed hydrozincation of the alkene followed by a second, slower nickel-catalyzed carboxylation of the in situ formed
已经开发出一种使用 CO2 的镍催化苯乙烯还原羧化反应。使用二乙基锌作为还原剂,反应在温和条件下进行。初步数据表明,该机制涉及两个离散的镍介导的催化循环,第一个涉及烯烃的催化氢化,随后是原位形成的有机锌试剂的第二个较慢的镍催化羧化。重要的是,该催化剂系统非常稳健,即使仅将等摩尔量的二氧化碳引入反应上方的顶部空间,也能以良好的产率固定二氧化碳。
[EN] HYDROGEN SULFIDE DERIVATIVES OF NON-STEROIDAL ANTI-INFLAMMATORY DRUGS<br/>[FR] DÉRIVÉS DE SULFURE D'HYDROGÈNE D'ANTI-INFLAMMATOIRES NON STÉROÏDIENS
申请人:ANTIBE THERAPEUTICS INC
公开号:WO2008009127A1
公开(公告)日:2008-01-24
[EN] The present invention relates to derivatives of non-steroidal anti-inflammatory drugs (NSAIDs) having improved anti-inflammatory properties useful in the treatment of inflammation, pain and fever. More particularly, NSAIDs are derivatized with a hydrogen sulfide (H2S) releasing moiety to produce novel anti-inflammatory compounds having reduced side effects. [FR] La présente invention concerne des dérivés d'anti-inflammatoires non stéroïdiens (AINS) présentant de meilleures propriétés anti-inflammatoires utiles pour traiter l'inflammation, la douleur et la fièvre. Plus particulièrement, ces anti-inflammatoires non stéroïdiens (AINS) sont dérivés avec un groupe de libération de sulfure d'hydrogène (H2S) afin qu'on obtienne de nouveaux composés anti-inflammatoires présentant des effets secondaires réduits.