Ester derivatives of 6-substituted cis-bicyclo[3.2.0]heptan-6-ol, and of 7-substituted cis-bicyclo[4.2.0]octan-7-ol were solvolyzed to the corresponding cycloheptene and cyclooctene products. In general, acetolysis of the 3,5-dinitrobenzoates in glacial or aqueous acetic acid proved most effective for this transformation. The conjugated dienes obtained from geminal alkenylhydroxy starting materials were sensitive to polymerization and/or olefin isomerization, but were sufficiently stable to permit spectroscopic characterization and subsequent reaction with dienophiles.
6-取代的顺式双环[3.2.0]庚
烯-6-醇和7-取代的顺式双环[4.2.0]
辛烯-7-醇的
酯衍
生物被溶剂解离生成相应的
环戊烯和环
辛烯产物。一般来说,在
冰醋酸或
水性
醋酸中对
3,5-二硝基苯甲酸酯的乙酰解证明对这一转化最有效。从双键醇起始材料得到的共轭二
烯对聚合和/或
烯烃异构化敏感,但足够稳定以便进行光谱表征和随后与二
烯亲电试剂的反应。