Mild and selective palladium(0)-catalyzed deallylation of allylic amines. Allylamine and diallylamine as very convenient ammonia equivalents for the synthesis of primary amines
[EN] OSW-1 ANALOGS AND CONJUGATES, AND USES THEREOF<br/>[FR] CONJUGUÉS ET ANALOGUES D'OSW-1, ET LEURS UTILISATIONS
申请人:HARVARD COLLEGE
公开号:WO2012159027A2
公开(公告)日:2012-11-22
Provided are a number of compounds structurally related to OSW-1, a natural compound that binds OSBPs. Also provided are pharmaceutical compositions comprising the OSW-1 analogs, as well as methods for use of these OSW-1 analogs, or pharmaceutically acceptable salts, enantiomers, or stereoisomers thereof, in the treatment of atherosclerosis, Alzheimer's disease, and cancer, including p21 -deficient cancer. Conjugates of OSW-1 analogs with monoclonal antibodies, including monoclonal antibodies targeted to cancer cells, are also provided. Also provided are pharmaceutical compositions comprising the conjugates, as well as methods for use of these conjugates, in the treatment of cancer, including p21 -deficient cancer.
Efficient Enzymatic Synthesis of Carbamates in Water Using Promiscuous Esterases/Acyltransferases
Biocatalysis provides an attractive approach to facilitate synthetic reactions in aqueous media. Motivated by the discovery of promiscuous aminolysis activity of esterases, we exploited the esterase from Pyrobaculum calidifontis VA1 (PestE) for the synthesis of carbamates from different aliphatic, aromatic, and arylaliphatic amines and a set of carbonates such as dimethyl‐, dibenzyl‐, or diallyl carbonate. Thus, aniline and benzylamine derivatives, aliphatic and even secondary amines could be efficiently converted into the corresponding benzyloxycarbonyl (Cbz)‐ or allyloxycarbonyl (Alloc)‐protected products in bulk water, with (isolated) yields of up to 99 %.