methyl {(1R,4Z,8S,13E)-1,8-dihydroxy-13-[2-(methyltrisulfanyl)ethylidene]spiro[bicyclo[7.3.1]tri-deca-4,9-diene-2,6-diyne-11,2'-[1,3]dioxolan]-10-yl}carbamate 、 S-[(2R,3R,4S,6S)-6-[[(2R,3S,4S,5R)-5-[(2S,4S,5S)-5-[ethyl(9H-fluoren-9-ylmethoxycarbonyl)amino]-4-methoxyoxan-2-yl]oxy-4-hydroxy-2-methyl-6-(2,2,2-trichloroethanimidoyl)oxyoxan-3-yl]-(2-trimethylsilylethoxycarbonyl)amino]oxy-2-methyl-4-triethylsilyloxyoxan-3-yl] 5-iodo-2,3-dimethoxy-4-[(2S,3R,4R,5S,6S)-4-methoxy-6-methyl-3,5-bis(triethylsilyloxy)oxan-2-yl]oxy-6-methylbenzenecarbothioate 在
4 A molecular sieve 、
silver trifluoromethanesulfonate 作用下,
以
二氯甲烷 为溶剂,
反应 12.0h,
以34%的产率得到