The treatment of 1-acylbicyclo[4.2.0]oct-3-ene with ethylaluminum dichloride gave 6-alkylbicyclo-[4.3.0]non-3-en-7-one in good yields. It was found that the stereoselectivity largely depended on the structure of acyl group and the acetyl derivatives gave cis-isomers with high stereoselectivity.
用二
氯化乙基铝处理1-酰基双环[4.2.0]辛-3-烯,以良好的收率得到6-烷基双环-[4.3.0] non-3-en-7-one。发现立体选择性很大程度上取决于酰基的结构,并且乙酰基衍
生物产生具有高立体选择性的顺式异构体。