Alcohols and aluminum alkoxides in the presence of Raney nickel as alkylating agents. 3. Reduction of Schiff bases with isopropyl alcohol and aluminum isopropoxide in the presence of Raney nickel
The imines ArC(Me)NCH2Ph (Ar = Ph, 2-MeO-C6H4, 3-MeO-C6H4, 4-MeO-C6H4) are hydrogenated to the corresponding amines with extremely high enantioselectivities up to 96% under very mild conditions, using rhodium complexes associated with sulfonated bdpp.
Gonadotropin-releasing hormone receptor antagonists and methods relating thereto
申请人:Zhu Yun-Fei
公开号:US20070208049A1
公开(公告)日:2007-09-06
GnRH receptor antagonists are disclosed that have utility in the treatment of a variety of sex-hormone related conditions in both men and women. The compounds of this invention have the structure:
wherein A, Q, R
1
, R
2
, R
3a
, R
3b
, R
4
, R
5
, R
6
and n are as defined herein, including stereoisomers, prodrugs and pharmaceutically acceptable salts thereof. Also disclosed are compositions containing a compound of this invention in combination with a pharmaceutically acceptable carrier, as well as methods relating to the use thereof for antagonizing gonadotropin-releasing hormone in a subject in need thereof.
A one-pot reductive amination of aldehydes and ketones with amines using alpha-picoline-borane as a reducing agent is described. The reaction has been carried out in Wolf, in H2O, and in neat conditions in the presence of small amounts of AcOH. This is a highly efficient and mild procedure that is applicable for a wide variety of substrates. In particular, this is the first successful demonstration that this type of reaction can be carried out in water and in neat conditions. (C) 2004 Elsevier Ltd. All rights reserved.
A mild, pyridine-borane-based reductive amination protocol