Organocatalysis;
Guanidines;
Stereoselective reactions;
DIRECT ALDOL REACTION;
GUANIDINES;
EPOXIDES;
THIOLS;
D O I:
10.1016/j.tet.2012.05.124
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
A low loading of triazabicyclo[4.4.0]dec-5-ene (TBD) catalyzes the alpha-sulfenylation reaction of ketones employing tetramethylthiuram disulfide (TMTDS) as electrophilic reagent. This methodology is mild, effective and straightforward, rendering the desired products in high yield. Prochiral 4-substituted cyclohexanones can be desymmetrized with remarkable diastereoselectivity following this protocol. The dithiocarbamoyl function was shown to be easily removed upon reduction, affording thiols (1-mercaptan-2-ols). (C) 2012 Elsevier Ltd. All rights reserved.
机构:
Tokyo Inst Technol, Grad Sch Sci & Engn, Dept Appl Chem, Meguro Ku, Tokyo 152, JapanTokyo Inst Technol, Grad Sch Sci & Engn, Dept Appl Chem, Meguro Ku, Tokyo 152, Japan
Kawashima, Takashi
论文数: 引用数:
h-index:
机构:
Takao, Toshiro
Suzuki, Hiroharu
论文数: 0引用数: 0
h-index: 0
机构:
Tokyo Inst Technol, Grad Sch Sci & Engn, Dept Appl Chem, Meguro Ku, Tokyo 152, JapanTokyo Inst Technol, Grad Sch Sci & Engn, Dept Appl Chem, Meguro Ku, Tokyo 152, Japan