2-(methoxycarbonyl)malonaldehyde 、 (2S,6S)-2-Methoxy-6-trityloxymethyl-3,6-dihydro-2H-pyran 以
环己烷 为溶剂,
反应 9.0h,
以5%的产率得到(4aS,6S,8S,8aS)-1-Hydroxy-6-methoxy-8-trityloxymethyl-5,6,8,8a-tetrahydro-1H,4aH-pyrano[3,4-c]pyran-4-carboxylic acid methyl ester