Stereospecific synthesis of phosphono-(1Z,3E)-dienyl compounds from β-phenyltelluro-vinylphosphonates and -vinylphosphine oxides
摘要:
Phosphono-1,3-dienyl compounds 2 can be prepared by palladium cross-coupling reaction of beta-phenyltelluro-vinylphosphonates or -vinylphosphine oxides with alkenes in the presence of a catalytic amount of PdCl2 and AcOAg as reoxidant agent at room temperature. The coupling reaction is stereospecific and the compounds 2 were obtained in good yields with total retention of configuration. (C) 2003 Elsevier B.V. All rights reserved.
Synthesis of β-organotelluro vinylphosphine oxides by hydrotelluration of 1-alkynylphosphine oxides and their palladium-catalyzed cross-coupling with alkynes
作者:Antonio L. Braga、Fabrı́cio Vargas、Gilson Zeni、Claudio C. Silveira、Leandro H. de Andrade
DOI:10.1016/s0040-4039(02)00778-5
日期:2002.6
β-Organotelluro vinylphosphine oxides 2 can be prepared by treatment of 1-alkynylphosphine oxides 1 with tellurolate anions in satisfactory yields. Compound 2d undergoes direct coupling reaction with terminal alkynes in the presence of PdCl2/CuI, triethylamine and methanol at room temperature to give β-alkynyl vinylphosphine oxides 3 with retention of configuration in good yields.
Stereospecific synthesis of phosphono-(1Z,3E)-dienyl compounds from β-phenyltelluro-vinylphosphonates and -vinylphosphine oxides
作者:Antonio L Braga、Cristiano R.B Rhoden、Gilson Zeni、Claudio C Silveira、Leandro H Andrade
DOI:10.1016/s0022-328x(03)00671-5
日期:2003.10
Phosphono-1,3-dienyl compounds 2 can be prepared by palladium cross-coupling reaction of beta-phenyltelluro-vinylphosphonates or -vinylphosphine oxides with alkenes in the presence of a catalytic amount of PdCl2 and AcOAg as reoxidant agent at room temperature. The coupling reaction is stereospecific and the compounds 2 were obtained in good yields with total retention of configuration. (C) 2003 Elsevier B.V. All rights reserved.