5-O-tert-butyldimethylsilyl-7-O-trimethylsilyl-4''-deoxy-4''-(R)-formylavermectin B1b 、
5-O-tert-butyldimethylsilyl-7-O-trimethylsilyl-4''-deoxy-4''-(S)-formylavermectin B1b 、 5-O-tert-butyldimethylsilyl-7-O-trimethylsilyl-4''-deoxy-4''-(R)-formylavermectin B1a 、 5-O-tert-butyldimethylsilyl-7-O-trimethylsilyl-4''-deoxy-4''-(S)-formylavermectin B1a 在
sodium tetrahydroborate 作用下,
以
甲醇 、
水 为溶剂,
反应 0.5h,
生成
5-O-tert-butyldimethylsilyl-7-O-trimethylsilyl-4''-deoxy-4''-(R)-(hydroxymethyl)avermectin B1b 、
5-O-tert-butyldimethylsilyl-7-O-trimethylsilyl-4''-deoxy-4''-(S)-(hydroxymethyl)avermectin B1b 、 5-O-tert-butyldimethylsilyl-7-O-trimethylsilyl-4''-deoxy-4''-(R)-(hydroxymethyl)avermectin B1a 、 5-O-tert-butyldimethylsilyl-7-O-trimethylsilyl-4''-deoxy-4''-(S)-(hydroxymethyl)avermectin B1a