酮基丙二酸二乙酯 、 4-(2-Methyl-allyloxy)-but-2-ynoic acid methyl ester 在
chiral 2,2'-(Ph
2P)2-1,1'-binaphthyl-based rhodium(I) complex 作用下,
以
1,2-二氯乙烷 为溶剂,
反应 16.0h,
生成
(-)-3a-methyl-3a,4-dihydro-1H,3H-furo[3,4-c]pyran-6,6,7-tricarboxylic acid 6,6-diethyl ester 7-methyl ester 、
(-)-3a-methyl-3a,4-dihydro-1H,3H-furo[3,4-c]pyran-6,6,7-tricarboxylic acid 6,6-diethyl ester 7-methyl ester