摘要 : Ⅰ. INTRODUCTION The reaction of 1,5-cyclooctadiene in an alcohol or acetic acid medium under the catalysis of Pd(Ⅱ) yields transannular products: bicyclo-[3,3,0]-octane derivatives. This is explained by the fact that the two vin... 展开 Ⅰ. INTRODUCTION The reaction of 1,5-cyclooctadiene in an alcohol or acetic acid medium under the catalysis of Pd(Ⅱ) yields transannular products: bicyclo-[3,3,0]-octane derivatives. This is explained by the fact that the two vinyl groups in the 1,5-cyclooctadiene molecule are very close to each other in space. Hence the reaction runs through a six-member cyclic com- 收起