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
阳离子CPRU复杂的手性吡啶甲酸衍生物[(的[R )-或(小号)-Cl-的Naph-PyCOOCH 2 CH = CH 2 ]催化不对称分子内脱水Ñ的-allylation Ñ取代ω氨基-和氨基羰基烯丙基醇底物/催化剂比例最高为2000,可得到对映体比例最高> 99:1的α-烯基吡咯烷-,哌啶-和氮杂环庚烷型N-杂环。广泛适用的N取代基,包括Boc,Cbz,Ac,Bz,丙烯酰基,巴豆酰基,甲酰基和Ts,极大地促进了对天然产物合成的进一步控制。