Diethyl Ether–Boron Trifluoride (1/1) Induced Transannular Cyclization Reaction of Humulene 2,3-Epoxide
作者:Kiyoharu Hayano、Haruhisa Shirahama
DOI:10.1246/bcsj.69.459
日期:1996.2
The treatment of (6E, 9E)-2,3-epoxy-3,7,11,11-tetramethylcycloundeca-6,9-diene with Et2O·BF3 produced four novel transannular cyclized compounds of (4E)-(1S*, 8S*, 9S*)-8-acetoxy-6,6,9-trimethyl-2-methylenebicyclo[7.2.0]undec-4-ene (13), (2Z, 4E)-(1S*, 8S*, 9S*)-8-acetoxy-2,6,6,9-tetramethylbicyclo[7.2.0]undeca-2,4-diene (14), (6E)-(1R*, 2R*, 3S*, 10R*)-3-acetoxy-2,5,5-trimethyl-9-methylenebicyclo[8
(6E, 9E)-2,3-epoxy-3,7,11,11-tetramethylcycloundeca-6,9-diene 用 Et2O·BF3 处理产生了四种新型的 (4E)-(1S*, 8S) 环化化合物*, 9S*)-8-乙酰氧基-6,6,9-trimethyl-2-methylenebicyclo[7.2.0]undec-4-ene (13), (2Z, 4E)-(1S*, 8S*, 9S* )-8-乙酰氧基-2,6,6,9-四甲基双环[7.2.0]十一碳-2,4-二烯 (14), (6E)-(1R*, 2R*, 3S*, 10R*)-3 -乙酰氧基-2,5,5-三甲基-9-亚甲基双环[8.1.0]十一碳-6-烯(15)和(4E)-(1S*, 2S*, 8S*, 9S*)-2,8 -diacetoxy-2,6,6,9-四甲基双环[7.2.0]undec-4-ene (16) 连同三个新的乙酸酯:(2E