3,4-二氢-2H-吡喃 、
ent-3α,10β-dihydroxy-12β-(2''-iodo-4''-(3'''-trifluoromethyl-3'''H-diazirin-3'''-yl)phenylmethoxymethyl)-20-norgibberell-16-ene-7,19-dioic acid 7-methyl ester 19,10-lactone 在
4-甲基苯磺酸吡啶 作用下,
以
二氯甲烷 为溶剂,
反应 24.0h,
以72%的产率得到ent-3α,10β-dihydroxy-12β-(2''-iodo-4''-(3'''-trifluoromethyl-3'''H-diazirin-3'''-yl)phenylmethoxymethyl)-3α-tetrahydropyran-2-yloxy-20-norgibberell-16-ene-7,19-dioic acid 7-methyl ester 19,10-lactone