(1R,4R,5R)-1,5-dimethyl-4-hydroxy-10-oxa-bicyclo[4.3.1]dec-6-ene-7-carboxylic acid methyl ester 在
potassium trimethylsilonate 作用下,
以
四氢呋喃 为溶剂,
反应 0.5h,
以2.8 mg的产率得到(-)-(R)-2-ethyl-6-(2-formylethyl)-5,6-dihydro-6-methyl-4H-pyran-3-carboxylic acid methyl ester