Vv. Govande et al., Synthesis of azetidin-2-ones from imines and acids using trichloroacetonitrile-triphenylphosphine reagent, SYN COMMUN, 30(22), 2000, pp. 4177-4182
A one step synthesis of azetidin-2-ones (3a-j) has been described by the re
action of imines (1) with acids (2) in presence of trichloroacetonitrile, t
riphenylphosphine and triethylamine.