烯丙胺与乙炔二甲酸二甲酯的反应在质子酸催化下得到 15,这是迈克尔加成和氮杂-克莱森重排的产物。该序列涉及4c或19-21的迈克尔加成以生成中间体N-烯基铵盐14,其经历电荷加速重排为15。甲苯磺酸是用于麦克尔加成步骤的有用催化剂。苯甲酸无效,因为中间体 14 被苯甲酸反离子竞争性脱烷基。在一种情况下,中间体 N-链烯基铵离子 18 已被 1 H NMR 光谱检测到,并已观察到在 -20 o C 下发生氮杂-克莱森重排
A novel chiral ligand mimicking N-Ar axial chirality, (S)-N-[2-(diphenylphosphanyl)naphthalen-1-yl]-2-(piperidinylmethyl)piperidine, was found to exhibit good enantioselectivity (up to 80% ee) in the asymmetric cross-coupling reaction of 1-phenylethylmagnesium chloride with β-bromostyrene derivatives. Additionally, this type ligand is appealing, because it allows the synthesis of a wide variety of analogues.
The invention relates to N-substituted azaindolyl compounds of Formula I with anti-cancer and/or anti-inflammatory activity and more specifically to N-substituted azaindolyl compounds which inhibit MEK kinase activity. The invention provides compositions and methods useful for inhibiting abnormal cell growth or treating a hyperproliferative disorder, or treating an inflammatory disease in a mammal. The invention also relates to methods of using the compounds for in vitro, in situ, and in vivo diagnosis or treatment of mammalian cells, or associated pathological conditions.
Palladium-Catalyzed Coupling of Optically Active Amines with Aryl Bromides
作者:Seble Wagaw、Roger A. Rennels、Stephen L. Buchwald
DOI:10.1021/ja971583o
日期:1997.9.1
coupling of enantiomerically enriched amines with aryl bromides produces the corresponding N-aryl derivatives. The choice of ligand in the palladium-catalyzed coupling is critical to the formation of the anilines without loss of enantiomeric purity. While LnPd (L = P(o-tolyl)3) successfully catalyzes the intramolecular aryl amination of α-subsituted optically pure amines, intermolecular coupling reactions
The invention relates to bicyclic heterocycles of formulae I and II with anti-cancer and/or anti-inflammatory activity and more specifically with MEK kinase inhibitory activity. The invention provides compositions and methods useful for inhibiting abnormal cell growth, treating a hyperproliferative disorder, or treating an inflammatory disease in a mammal. The invention also relates to methods of using the compounds for in vitro, in situ, and in vivo diagnosis or treatment of mammalian cells, or associated pathological conditions.
The invention relates to imidazopyridines of formula I with anti-cancer and/or anti-inflammatory activity and more specifically to imidazopyridines which inhibit MEK kinase activity. The invention provides compositions and methods useful for inhibiting abnormal cell growth or treating a hyperproliferative disorder, or treating an inflammatory disease in a mammal. The invention also relates to methods of using the compounds for in vitro, in situ, and in vivo diagnosis or treatment of mammalian cells, or associated pathological conditions.