Reductive coupling of α,β-enones I: Reduction of methyl-vinyl ketone and mesityl oxide.
作者:Jean-Marc Pons、Jean-Pierre Zahra、Maurice Santelli
DOI:10.1016/s0040-4039(01)82039-6
日期:1981.1
Reductive coupling of methyl-vinyl ketone with TiCl4-Mg gives pinacol (25%). According to the reducing agents, mesityl oxide yields 2,4,5,7-tetramethyl-octa-2,4,6-triene (with 4TiCl3-LialH4), triene or 2,4,5,7-tetramethyl-octa-2,6-dien-4,5-diol (with TiCl4-Mg), pinacol (with VCl3-Mg), and 2-acetyl-1,3,3,4,4-pentamethyl-cyclopentane (with CrCl3-Mg or FeCl3-Mg or ZrCl4 or ZrCl4-Mg) as major products
甲基-乙烯基酮与TiCl 4 -Mg的还原偶联得到频哪醇(25%)。根据还原剂,异亚丙基丙酮产生2,4,5,7-四甲基-辛基-2,4,6-三烯(具有4TiCl 3 -LialH 4),三烯或2,4,5,7-四甲基-辛基-2,6-二烯-4,5-二醇(含TiCl 4 -Mg),频哪醇(含VCl 3 -Mg)和2-乙酰基-1,3,3,4,4-五甲基环戊烷(含CrCl 3 -Mg或FeCl 3 -Mg或ZrCl 4或ZrCl 4 -Mg)为主要产品。