Enantioselective Synthesis of Pyrrolidine-, Piperidine-, and Azepane-Type <i>N</i>-Heterocycles with α-Alkenyl Substitution: The CpRu-Catalyzed Dehydrative Intramolecular <i>N</i>-Allylation Approach
作者:Tomoaki Seki、Shinji Tanaka、Masato Kitamura
DOI:10.1021/ol203218d
日期:2012.1.20
acid derivatives [(R)- or (S)-Cl-Naph-PyCOOCH2CH═CH2] catalyzes asymmetric intramolecular dehydrative N-allylation of N-substituted ω-amino- and -aminocarbonyl allylic alcohols with a substrate/catalyst ratio of up to 2000 to give α-alkenyl pyrrolidine-, piperidine-, and azepane-type N-heterocycles with an enantiomer ratio of up to >99:1. The wide range of applicable N-substitutions, including Boc, Cbz
LIGAND FOR ASYMMETRIC SYNTHESIS CATALYST, AND PROCESS FOR PRODUCTION OF ALPHA-ALKENYL CYCLIC COMPOUND USING SAME
申请人:Kitamura Masato
公开号:US20120220780A1
公开(公告)日:2012-08-30
Disclosed are: a ligand for an asymmetric synthesis catalyst; and a process for producing an α-alkenyl cyclic compound using the ligand. Specifically disclosed are: a ligand for an asymmetric synthesis catalyst, which is represented by any one of formulae (1) to (4) [wherein R
1
represents —Cl or —Br; R
2
represents —CH
3
or —CF
3
; and R
3
represents —CH
2
—CH═CH
2
or —H]; and a process for producing an α-alkenyl cyclic compound using the ligand.