(3S,4S,5R,6R)-benzoic acid-2-methoxy-6-methoxycarbonylmethyl-3,5-dimethyltetrahydropyran-4-yl-ester 在
四丙基高钌酸铵 、 3 A molecular sieve 、 N-morpholino-N-oxide 、
溶剂黄146 作用下,
生成 (3S,4S,5R,6R)-benzoic acid 2-methoxycarbonylmethyl-3,5-dimethyl-6-oxotetrahydropyran-4-yl-ester