2-(trimethylsilyloxy)acrylic acid ethyl ester 、
(2R,3S)-3-[(R)-1,2-Bis-(tert-butyl-diphenyl-silanyloxy)-ethyl]-oxirane-2-carbaldehyde 在
三氟化硼乙醚 作用下,
以
二氯甲烷 为溶剂,
生成 ethyl (1R,3R,4S,5R)-3-[(1R)-1,2-bis[[tert-butyl(diphenyl)silyl]oxy]ethyl]-5-hydroxy-2,7-dioxabicyclo[2.2.1]heptane-1-carboxylate 、 (1R,3R,4S,5S)-3-[(R)-1,2-Bis-(tert-butyl-diphenyl-silanyloxy)-ethyl]-5-hydroxy-2,7-dioxa-bicyclo[2.2.1]heptane-1-carboxylic acid ethyl ester