Direct Preparation of N-(Alk-1-en-1-yl)carbamates from Cyclic Ketones and Unsubstituted Carbamates
作者:Philippe Dupau、Anne-Emmanuelle Hay、Célia Alameda Angulo、Pierre H. Dixneuf、Christian Bruneau
DOI:10.1135/cccc20020235
日期:——
N-(Alk-1-en-1-yl)carbamates bearing an endocyclic carbon-carbon double bond have been prepared by the reaction of unsubstituted carbamates with tetrahydronaphthalen-2-one and chroman-2-one derivatives in the presence of a catalytic amount of 4-methylbenzene-1-sulfonic acid.
New route to optically active amine derivatives: ruthenium-catalyzed enantioselective hydrogenation of ene carbamates
作者:Philippe Dupau、Christian Bruneau、Pierre H Dixneuf
DOI:10.1016/s0957-4166(99)00375-4
日期:1999.9
conditions directly affords prochiral ene carbamates. Their enantioselective hydrogenation in the presence of a chiral ruthenium catalyst provides a new access to opticallyactive carbamates easy to deprotect to the corresponding opticallyactive amines.