Rhodium-catalyzed highly selective thioformylation of acetylenes with thiols and carbon monoxide
作者:Jun-ichi Kawakami、Mitsuhiro Takeba、Ikuyo Kamiya、Noboru Sonoda、Akiya Ogawa
DOI:10.1016/s0040-4020(03)01061-5
日期:2003.8
Highly regioselective thioformylation of terminal acetylenes with thiols and carbon monoxide has been developed by the use of rhodium(I) complexes as the catalyst: formyl and thio groups are introduced into the terminal and inner positions of acetylenes, respectively. The thioformylation is performed in the presence of a catalytic amount of rhodium(I) complexes, such as RhH(CO)(PPh3)3, RhCl(PPh3)3
通过使用铑(I)配合物作为催化剂,已开发出具有硫醇和一氧化碳的末端乙炔的高度区域选择性硫甲酰基化:甲酰基和硫基分别引入乙炔的末端和内部。该thioformylation在铑催化量(I)配合物,如RhH的(CO)(PPH的存在下进行3)3,的RhCl(PPH 3)3,和的RhCl(CO)(PPH 3)2,下CH 3中120°C时CO(3 MPa)的最大压力CN以良好的产率提供β-硫代-α,β-不饱和醛。该硫代甲酰化可用于各种末端乙炔和芳族硫醇。一种机制性的建议包括形成硫化铑配合物作为关键物质。