tert-butyl-triphenyl-phosphonium; bromide 、 (7aS)-3-phenyl-1,7a-dihydro-3H,5H-pyrrolo[1,2-c]oxazol-5-one 在
(7aS)-3-phenyl-1,7a-dihydro-3H,5H-pyrrolo[1,2-c]oxazol-5-one 作用下,
以14的产率得到(1S,2S,4S,7R)-6-aza-3,3-dimethyl-8-oxa-7-phenyltricyclo<4.3.0.0>nonan-5-one