共 50 条
Halodiazophosphonates, a New Class of Diazo Compounds for the Diastereoselective Intermolecular Rh(II) Catalyzed Cyclopropanation
被引:17
|作者:
Schnaars, Christian
[1
]
Hansen, Tore
[1
]
机构:
[1] Univ Oslo, Dept Chem, N-0315 Oslo, Norway
关键词:
H INSERTION REACTIONS;
ENANTIOSELECTIVE SYNTHESIS;
DONOR/ACCEPTOR CARBENOIDS;
ASYMMETRIC-SYNTHESIS;
RHODIUM CARBENOIDS;
CYCLOPROPYLPHOSPHONATES;
ALKENES;
FUNCTIONALIZATION;
SELECTIVITY;
ACTIVATION;
D O I:
10.1021/ol3010276
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
(Halodiazomethyl)phosphonates 2A-C have been generated by a one-pot procedure via a clean, efficient, and rapid deprotonation/electrophilic halogenation sequence from diethyl diazomethylphosphonate 1 (EDP). Subsequent Intermolecular Rh(II)-catalyzed cyclopropanation afforded the corresponding halocyclopropylphosphonates 3-10 in moderate to high yields and high diastereomeric ratios. Catalyst loadings down to 0.1 mol % as well as clean and selective product formation were achieved.
引用
收藏
页码:2794 / 2797
页数:4
相关论文