(2E,7E,9E)-6-Benzyloxy-11-methyl-dodeca-2,7,9-trienoic acid methyl ester 在
苯磺酰胺 作用下,
以
甲苯 为溶剂,
生成 (1R,3aR,4S,5R,7aS)-1-Benzyloxy-5-isopropyl-2,3,3a,4,5,7a-hexahydro-1H-indene-4-carboxylic acid methyl ester 、 (1S,3aR,4S,5R,7aS)-1-Benzyloxy-5-isopropyl-2,3,3a,4,5,7a-hexahydro-1H-indene-4-carboxylic acid methyl ester 、 (1R,3aR,4S,5R,7aR)-1-Benzyloxy-5-isopropyl-2,3,3a,4,5,7a-hexahydro-1H-indene-4-carboxylic acid methyl ester 、 (1S,3aR,4S,5R,7aR)-1-Benzyloxy-5-isopropyl-2,3,3a,4,5,7a-hexahydro-1H-indene-4-carboxylic acid methyl ester