Dispiro[N,N-dimethyl-3-carboxamide-2,3-dihydro-1H-naphtho[2,1-b]-thiopyran-1,2'-thiirane-3',9''-(9''H-thioxanthene)] 在
三苯基膦 作用下,
以
对二甲苯 为溶剂,
生成 (R)-N,N-Dimethyl-1-(9H-thioxanthen-9-ylidene)-2,3-dihydro-1H-benzo[f]thiochromene-3-carboxamide 、 (S)-N,N-Dimethyl-1-(9H-thioxanthen-9-ylidene)-2,3-dihydro-1H-benzo[f]thiochromene-3-carboxamide