2-Ethyl-5-(2-hydroxy-ethyl)-furan-3-carboxylic acid amide 、
叔丁基二甲基氯硅烷 在
咪唑 、
间氯过氧苯甲酸 作用下,
生成 (1S,4R,5S)-4-[2-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-4-hydroxy-1-propionyl-6-oxa-3-aza-bicyclo[3.1.0]hexan-2-one 、 (1S,4S,5S)-4-[2-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-4-hydroxy-1-propionyl-6-oxa-3-aza-bicyclo[3.1.0]hexan-2-one