(5R,6R,8R)-6-((7S)-3-hydroxy-7-((2R,5R)-2-methyl-5-(2-(triethylsilyloxy)propan-2-yl)tetrahydrofuran-2-yl)-4-methylene-7-(triethylsilyloxy)heptyl)-8-((S)-2-methyl-5-oxotetrahydrofuran-2-yl)-1,3,7-trioxaspiro[4.5]decan-2-one 在
potassium carbonate 作用下,
以
甲醇 为溶剂,
生成 (S)-5-((2R,5R,6R)-5-hydroxy-6-((3R,7S)-3-hydroxy-7-((2R,5R)-2-methyl-5-(2-(triethylsilyloxy)propan-2-yl)tetrahydrofuran-2-yl)-4-methylene-7-(triethylsilyloxy)heptyl)-5-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)-5-methyldihydrofuran-2(3H)-one 、
(S)-5-((2R,5R,6R)-5-hydroxy-6-((3S,7S)-3-hydroxy-7-((2R,5R)-2-methyl-5-(2-(triethylsilyloxy)propan-2-yl)tetrahydrofuran-2-yl)-4-methylene-7-(triethylsilyloxy)heptyl)-5-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)-5-methyldihydrofuran-2(3H)-one