[EN] METHODS FOR THE PREPARATION OF ALKENYLAMINES, CYCLIC CARBAMATES OR DITHIOCARBAMATES, AND AMINOALCOHOLS OR AMINOTHIOLS<br/>[FR] PROCÉDÉS POUR LA PRÉPARATION D'ALCÉNYLAMINES, DE CARBAMATES CYCLIQUES OU DE DITHIOCARBAMATES, ET D'AMINOALCOOLS OU D'AMINOTHIOLS
申请人:VICTORIA LINK LTD
公开号:WO2010041964A1
公开(公告)日:2010-04-15
A method for preparing an alkenylamine, or a salt, solvate or hydrate thereof, is disclosed. The method comprises reacting a alogen-substituted cyclic acetal or a derivative thereof under particular conditions to provide the alkenylamine, which may be optionally converted into a salt, solvate or hydrate thereof. A method for preparing a cyclic carbamate or cyclic dithiocarbamate, or a salt, solvate or hydrate thereof, is also disclosed. The method comprises reacting an alkenylamine under particular conditions to provide the cyclic carbamate or cyclic dithiocarbamate, which may be optionally converted into a salt, solvate or hydrate thereof. A method for preparing a 1,2-aminoalcohol or 1,2-aminothiol, or a salt, solvate or hydrate thereof, is also disclosed. The method comprises forming a cyclic carbamate or cyclic dithiocarbamate from an alkenylamine, and deprotecting the cyclic carbamate or cyclic dithiocarbamate to provide the 1,2-aminoalcohol or 1,2-aminothiol, which may optionally be converted into a salt, solvate or hydrate thereof.
Protecting-Group-Free Synthesis of Amines: Synthesis of Primary Amines from Aldehydes via Reductive Amination
作者:Emma M. Dangerfield、Catherine H. Plunkett、Anna L. Win-Mason、Bridget L. Stocker、Mattie S. M. Timmer
DOI:10.1021/jo100004c
日期:2010.8.20
New methodology for the protecting-group-free synthesis of primary amines is presented. By optimizing the metal hydride/ammonia mediated reductive amination of aldehydes and hemiacetals, primary amines were selectively prepared with no or minimal formation of the usual secondary and tertiary amine byproduct. The methodology was performed on a range of functionalized aldehyde substrates, including in
Total Synthesis Without Protecting Groups: Pyrrolidines and Cyclic Carbamates
作者:Emma M. Dangerfield、Mattie S. M. Timmer、Bridget L. Stocker
DOI:10.1021/ol802484y
日期:2009.2.5
A protecting group free synthesis of 2,3-cis substituted hydroxypyrrolidines is reported. Two novel reaction methodologies allow for the stereoselective formation of cyclic carbamates from olefinic amines, and the formation of primary amines via a Vasella/reductive amination reaction, both performed in aqueous media.