我们研究了硅钨酸 (H 4 SiW 12 O 40 ) 多金属氧酸盐 (POM) 对糠醛和胺之间反应的催化效果,该反应选择性地产生反式- N , N -4,5-取代二氨基环戊烯-2-酮 ( trans - DACP)。H 4 SiW 12 O 40促进反式-DACP 库的合成,其负载量低至0.05 mol%,在露天,无添加剂,在短时间内和良好的高分离产率。该方案适用于仲胺以及具有 p K b的芳族伯胺高于约 9. 目前的催化合成方案具有扩展的底物范围和高产率,据我们所知,它代表了第一个多金属氧酸盐驱动的范例,作为在温和反应条件下生产环戊酮框架的有效方法。
[EN] SUBSTITUTED SULFONAMIDES USEFUL AS ANTIAPOPTOTIC BCL INHIBITORS<br/>[FR] SULFONAMIDES SUBSTITUÉS UTILES COMME INHIBITEURS DE BCL ANTI-APOPTOTIQUES
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2012162365A1
公开(公告)日:2012-11-29
Disclosed are compounds of Formula (I), or a pharmaceutically acceptable salt thereof, wherein: W and Q and G are defined herein. Also disclosed are methods of using such compounds as inhibitors of Bcl-2 family antiapoptotic proteins for the treatment of cancer; and pharmaceutical compositions comprising such compounds.
from a rhodium center to imine substrates in a biomimetic way. Under both transfer hydrogenation and reductiveamination reaction conditions, the catalyst exhibited good selectivity towards CN bonds. With the catalyst, 34 imines were transfer hydrogenated to corresponding amines and a key intermediate of retigabine was prepared via reductiveamination in a greener way. According to the NMR observations
将基于金属和键合辅因子模拟物之间合作的策略应用于 CN 键的转移氢化。我们设计并合成了一种含有 1,3-二甲基苯并咪唑部分的铑配合物,它可以以仿生的方式将氢化物从铑中心转移到亚胺底物上。在转移氢化和还原胺化反应条件下,催化剂对C N 键表现出良好的选择性。使用该催化剂,34个亚胺被转移氢化成相应的胺,并通过还原胺化以更绿色的方式制备了瑞替加滨的关键中间体。根据核磁共振观察和同位素实验,提出了这种仿生还原碳氮键的合理机制。
1,2,3-Triazole-boranes: stable and efficient reagents for ketone and aldehyde reductive amination in organic solvents or in water
作者:Wenyan Liao、Yunfeng Chen、Yuxiu Liu、Haifeng Duan、Jeffrey L. Petersen、Xiaodong Shi
DOI:10.1039/b915361f
日期:——
Air, moisture and thermally stable 1,2,3-triazole-borane complexes were developed as new practical reagents for ketone/aldehyde amination with high efficiency and excellent substrate diversity.
A palladium-catalyzed C–H carbonylation of benzylamines for the synthesis of isoindolinone scaffolds has been developed. This protocol is conducted under gas-free conditions by using benzene-1,3,5-triyl triformate (TFBen) as a convenient CO surrogate, furnishing a variety of isoindolinone derivatives in moderate to high yields (up to 95%).
Bio-Inspired Catalytic Imine Reduction by Rhodium Complexes with Tethered Hantzsch Pyridinium Groups: Evidence for Direct Hydride Transfer from Dihydropyridine to Metal-Activated Substrate
作者:Alex McSkimming、Mohan M. Bhadbhade、Stephen B. Colbran
DOI:10.1002/anie.201210086
日期:2013.3.18
Inspired by Nature: A conceptually new design for a catalyst, combining a metal center abutted to an organic hydride donor, is demonstrated for the formate‐driven transfer hydrogenation of imines under ambient conditions. A key step, transfer of hydride from the organohydride donor to the metal‐polarized substrate, mirrors that in metallo‐(de)hydrogenase enzymes.