The secondary amine participating asymmetricreductiveamination remains an unsolved problem in organic synthesis. Here we show for the first time that secondary amines are capable of effectively serving as N-sources in direct asymmetricreductiveamination to afford corresponding tertiary chiral amines with the help of a selected additive set under mild conditions (0–25 °C). The applied chiral phosphoramidite
Carbamoyl Esters That Inhibit Cholinesterase And Release Pharmacologically Active Agents
申请人:Verheijen C. Jeroen
公开号:US20070275959A1
公开(公告)日:2007-11-29
Carbamoyl esters inhibit cholinesterase activity and, upon hydrolysis release a pharmacologically active agent. In one embodiment, the carbamoyl ester has the following structure: Formula (I) wherein A is selected from the group consisting of an unsubstituted aryl, a substituted aryl, an unsubstituted heteroaryl and a substituted heteroaryl. The carbamoyl esters are employed in methods to treat an individual. The pharmacologically active agent obtained by hydrolysis of the carbamoyl esters can treat, for example, a nervous system condition, a cholinergic deficiency and conditions or diseases associated with a deficiency in a pharmacologically active agent, such as acetylcholine.
PROCESS FOR MAKING AMINOALKYLPHENYL CARBAMATES AND INTERMEDIATES THEREFOR
申请人:Tejedor Vinent Henar
公开号:US20080154057A1
公开(公告)日:2008-06-26
A process for making aminoalkylphenyl carbamates, especially rivastigmine, can use less severe conditions using bis(p-nitrophenyl)carbonate (IX) as a phenol activator compound.