2-thiopyridyl chloroformate 、 (3S,5R,6R,9R,11R,15S,16S,17R,18S,19E,21E,23E,25E,27E,29E,31E,33R,35S,36S,37S)-15,16,18-trimethyl-33-[(2R,3S,4S,5S,6R)-6-methyl-3,5-bis(triethylsilyloxy)-4-[(2,2,2-trifluoroacetyl)amino]oxan-2-yl]oxy-13-oxo-3,5,6,9,11,17,37-heptakis(triethylsilyloxy)-14,39-dioxabicyclo[33.3.1]nonatriaconta-1(38),19,21,23,25,27,29,31-octaene-36-carboxylic acid 在
三乙胺 作用下,
以
乙醚 为溶剂,
反应 1.0h,
以76%的产率得到S-pyridin-2-yl (3S,5R,6R,9R,11R,15S,16S,17R,18S,19E,21E,23E,25E,27E,29E,31E,33R,35S,36S,37S)-15,16,18-trimethyl-33-[(2R,3S,4S,5S,6R)-6-methyl-3,5-bis(triethylsilyloxy)-4-[(2,2,2-trifluoroacetyl)amino]oxan-2-yl]oxy-13-oxo-3,5,6,9,11,17,37-heptakis(triethylsilyloxy)-14,39-dioxabicyclo[33.3.1]nonatriaconta-1(38),19,21,23,25,27,29,31-octaene-36-carbothioate