中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 4-hydroxy-2,3,4-triphenylcyclopent-2-ene-1-one | 28742-18-9 | C23H18O2 | 326.395 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 2-Brom-3,4,5-triphenyl-2,4-cyclopentadien-1-on | 73442-55-4 | C23H15BrO | 387.275 |
—— | 3,4,5,3',4',5'-Hexaphenyl-bicyclopentyl-3,5,3',5'-tetraene-2,2'-dione | 32561-50-5 | C46H30O2 | 614.743 |
Treatment of 4-hydroxy-2,2-diphenyl-3-pentenoic acid lactone (3) with phenyllithium gives 1,2,2-triphenyl-1,4-pentanedione (2), 1,3,3-triphenyl-1,4-pentanedione (7), and 3,3-diphenylpropiophenone (16). The γ-diketone 7 is shown to arise via rearrangement of an anion of the γ-diketone 2. The formation of 1,2,3-triphenyl-1,4-pentanedione (27) is not observed, nor is 27 converted to 7 on treatment with base. It is concluded that the rearrangement proceeds via two homoenolate anion intermediates rather than via two 1,2 phenyl shifts.