Base-induced benzoyl migrations in Diels–Alder adducts of benzoyl-1,4-benzoquinones
作者:Raad Al-Hamdany、J. Malcolm Bruce、Ramchand T. Pardasani、Ian Watt
DOI:10.1039/c39810000171
日期:——
trans-penta-1,3-diene to substituted benzoyl-1,4-benzoquinones affords the corresponding 4a-benzoyl-4a,5,8,8a-tetrahydro-1,4-naphthoquinones which in pyridine and pyridine–methanol, undergo [1,5] and [1,2] benzoyl shifts to give 2-benzoyl-5,8-dihydro-1,4-dihydroxynaphthalenes; the effects of para-substituents in the benzoyl group on the kinetices and regiospecificity of the migration are described.
将丁-1,3-二烯和反戊-1,3-二烯添加到取代的苯甲酰基-1,4-苯醌中得到相应的4a-苯甲酰基-4a,5,8,8a-四氢-1,4-萘醌在吡啶和吡啶-甲醇中,它们经历[1,5]和[1,2]苯甲酰基转移,生成2-苯甲酰基-5,8-二氢-1,4-二羟基萘;描述了苯甲酰基中的对位取代基对迁移动力学和区域特异性的影响。