A catalyst composed of an organic phosphorus compound having a trivalent or pentavalent phosphorus atom and at least one carbon-phosphorus bonding or a combination of the organic phosphorus compound and a halogen atom-containing compound is effective for decarbonylation, that is, for releasing carbon monoxide from a compound containing a moiety of --CO--CO--O-- in its molecular structure.
Carbene‐Catalyzed Enantioselective Aromatic N‐Nucleophilic Addition of Heteroarenes to Ketones
作者:Yonggui Liu、Guoyong Luo、Xing Yang、Shichun Jiang、Wei Xue、Yonggui Robin Chi、Zhichao Jin
DOI:10.1002/anie.201912160
日期:2020.1.2
and optical purities. Our reaction involves the formation of an unprecedented aza-fulvene-type acylazolium intermediate. A broad range of N-heteroaromatic aldehydes and electron-deficient ketone substrates works effectively in this transformation. Several of the chiral N,O-acetal products afforded through this protocol exhibit excellent antibacterial activities against Ralstonia solanacearum (Rs) and
[EN] COMPOUNDS AND COMPOSITIONS FOR THE TREATMENT OF CANCER<br/>[FR] COMPOSÉS ET COMPOSITIONS POUR LE TRAITEMENT DU CANCER
申请人:PROMETIC BIOSCIENCES INC
公开号:WO2012097427A1
公开(公告)日:2012-07-26
New uses for phenylketone carboxylate compounds and substituted aromatic compounds of Formula I, Formula I.1, Formula I.2, Formula IA, Formula IB, Formula IC and Formula II and their pharmaceutical acceptable salts for the treatment of cancer. The use of a combination of two of these compounds is described and the use of the combination of one of these compounds with an anticancer agent such as decarbazine, doxorubicin, daunorubicin, cyclophosphamide, busulfex, busulfan, vinblastine, vincristine, bleomycin, etoposide, topotecan, irinotecan, taxotere, taxol, 5-fluorouracil, methotrexate, gemcitabine, cisplatin, carboplatin and chlorambucil.
Nucleophilic β-Carbon Activation of Propionic Acid as a 3-Carbon Synthon by Carbene Organocatalysis
作者:Zhichao Jin、Ke Jiang、Zhenqian Fu、Jaume Torres、Pengcheng Zheng、Song Yang、Bao-An Song、Yonggui Robin Chi
DOI:10.1002/chem.201501481
日期:2015.6.22
Direct β‐carbonactivation of propionic acid (C2H5CO2H) by carbene organocatalysis has been developed. This activation affords the smallest azolium homoenolate intermediate (without any substituent) as a 3‐carbon nucleophile for enantioselective reactions. Propionic acid is an excellent raw material because it is cheap, stable, and safe. This approach provides a much better solution to azolium homoenolate
已经开发了通过卡宾有机催化作用对丙酸(C 2 H 5 CO 2 H)进行直接β-碳活化。这种活化提供了最小的均氮唑鎓中间体(无任何取代基),作为对映选择性反应的3碳亲核试剂。丙酸是便宜,稳定和安全的原料,因此是一种极好的原料。这种方法比以前建立的丙烯醛(没有任何取代基的烯醛)使用昂贵,不稳定且有毒的方法提供了更好的解决方案,用于合成均氮唑鎓。
Copper-Catalyzed B–H Bond Insertion Reaction: A Highly Efficient and Enantioselective C–B Bond-Forming Reaction with Amine–Borane and Phosphine–Borane Adducts
A copper-catalyzed B-H bond insertion reaction with amine- and phosphine-borane adducts was realized with high yield and enantioselectivity under mild reaction conditions. The B-H bond insertion reaction provides a new C-B bond-forming methodology and an efficient approach to chiral organoboron compounds.