Arylation and alkenylation of aromatic aldehydes with silanediols is shown to proceed by use of a catalytic amount of rhodium complex. Treatment of ethyl(4-methoxyphenyl)silanediol with benzaldehyde in the presence of 3 mol% of [Rh(OH)(cod)]2 affords 4-methoxyphenyl(phenyl)methanol in 59% yield after stirring at 70 °C for 24 hours. On the other hand, diarylketone was also obtained at elevated temperature via β-hydride elimination from intermediary rhodium alkoxide.
芳香醛与
硅烷二醇的芳基化和烯基化反应是通过使用催化量的
铑络合物进行的。在 3 mol% 的 [Rh(OH)(cod)]2 存在下用
苯甲醛处理乙基(4-
甲氧基苯基)
硅烷二醇,在 70 °C 搅拌 24 小时后得到 4-
甲氧基苯基(苯基)
甲醇,收率 59% 。另一方面,二芳基酮也是在高温下通过中间醇
铑消除β-
氢化物而获得的。