2-[(4R,6R,7E)-4,6-bis(tert-butyldimethylsilyloxy)-2-oxo-8-phenyl-7-octenyl]oxazole-4-carboxylic acid methyl ester 、
甲醇 在
camphor-10-sulfonic acid 作用下,
反应 16.0h,
以86%的产率得到2-(2S,4R,6R(1E)-4-hydroxy-2-methoxy-6-(2-phenylethenyl)tetrahydro-2H-pyranylmethyl)oxazole-4-carboxylic acid methyl ester