D -(+)-樟脑与哌啶形成烯胺2。化合物2在烯胺碳原子C3上添加HB(C 6 F 5)2形成路易斯酸/路易斯碱加合物(exo- / endo-异构体为3)。暴露3至二氢(2.5巴,室温)引线的H异裂分裂2形成为H + / H -加成产物(4 “看不见的”沮丧路易斯对中,两个非对映体)(5,这是两个非对映异构体),显然是在平衡条件下通过烯胺硼氢化原位生成的。
piperidine. Compound 2 adds HB(C6F5)2 at the enamine carbon atom C3 to form a Lewis acid/Lewis base adduct (exo‐/endo‐isomers of 3). Exposure of 3 to dihydrogen (2.5 bar, room temperature) leads to heterolytic splitting of H2 to form the H+/H− addition products (4, two diastereoisomers) of the “invisible” frustratedLewispairs (5, two diastereoisomers) that were apparently generated in situ by enamine
D -(+)-樟脑与哌啶形成烯胺2。化合物2在烯胺碳原子C3上添加HB(C 6 F 5)2形成路易斯酸/路易斯碱加合物(exo- / endo-异构体为3)。暴露3至二氢(2.5巴,室温)引线的H异裂分裂2形成为H + / H -加成产物(4 “看不见的”沮丧路易斯对中,两个非对映体)(5,这是两个非对映异构体),显然是在平衡条件下通过烯胺硼氢化原位生成的。
Bondavalli, Francesco; Schenone, Pietro; Ranian, Angelo, Journal of Chemical Research, Miniprint, 1980, # 8, p. 3256 - 3262