4-(furan-2-ylmethoxy)-3-oxo-butyric acid methyl ester 、
L-脯氨醇 以
5,5-dimethyl-1,3-cyclohexadiene 为溶剂,
反应 6.0h,
生成 (3aR,5aS,8bS)-8b-(furan-2-ylmethyl)-hexahydro-3,4-dioxa-8a-aza-as-indacen-2-one 、 (3aS,5aS,8bR)-8b-(furan-2-ylmethyl)-hexahydro-3,4-dioxa-8a-aza-as-indacen-2-one 、 (3aS,5aS,8bS)-8b-(2-methyl-furan-3-yl)-hexahydro-3,4-dioxa-8a-aza-as-indacen-2-one