O5,O6-isopropylidene-O8-trityl-D-allo-4,7-anhydro-2,3-dideoxy-oct-2-ynonic acid methyl ester 、
5-[(Triphenyl-lambda5-phosphanylidene)amino]-2,3-dihydrothiophene-4-carbonitrile 以
乙腈 为溶剂,
生成 methyl 5-[(3aS,4S,6R,6aR)-2,2-dimethyl-6-(trityloxymethyl)-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]dioxol-4-yl]-4-cyano-7-[(triphenyl-lambda5-phosphanylidene)amino]-2,3-dihydrothiepine-6-carboxylate