Catalytic addition of ferrocenyl ketones to olefins with the aid of Ru(H)2(CO)(PPh3)3
摘要:
The catalytic addition reactions of ferrocenyl ketones with terminal olefins in the presence of Ru(H)(2)(CO)(PPh3)(3) as catalyst have been studied. Benzoylferrocene reacts with triethoxyvinylsilane, styrene and vinylferrocene, respectively, to give 1:1 coupling products I-III in high yields. C-H bond cleavage takes place at the carbon atom of the benzene ring at the ortho position of the carbonyl group and C-C bond formation takes place at the terminal carbon atom of the olefins. 2-Furoylferrocene reacts with vinylferrocene to give a 1:1 coupling product IV and the C-H bond cleavage takes place at the carbon atom of the furan ring at the ortho position of the carbonyl group and the C-C bond formation takes place at the terminal carbon atom of vinylferrocene. The new products I-IV have been characterized by elemental analysis, H-1-NMR and MS. The X-ray crystal structure of IV has been determined. (C) 2001 Elsevier Science B.V. All rights reserved.