6-(5-ethoxyhept-1-yl)bicyclo[3.3.0]octan-3-one 、 Methoxyheptyl bicyclooctanone 、
3-(5-ethoxyhept-1-yl)cyclopentene 、
二氯乙烯酮 以to form a first mixture comprising 7,7-dichloro-4-(5-ethoxyhept-1-yl)bicyclo[3.2.0]heptan-6-one and 6,6-dichloro-4-(5-ethoxyhept-1-yl)bicyclo[3.2.0]-heptan-7-one的产率得到6,6-dichloro-2-(5-ethoxyhept-1-yl)bicyclo[3.2.0]heptan-7-one {7,7-dichloro-4-(5-ethoxyheptyl)bicyclo [3.2.0]heptan-6-one}