名称:
A simple one-pot preparation of (Z)-cyclopropanes from γ,δ-ketoalkenes using KOH/DMSO intramolecular alkylation conditions.
摘要:
Sequential treatment of gamma,delta-ketoalkenes with aqueous NBS in DMSO and KOH as solid provides (Z)-cyclopropanes in good overall yields with a diastereoselective excess >99%.
DOI:
10.1016/s0040-4039(00)60138-7