作者:Andrei V. Malkov、Ian R. Baxendale、Dalimil Dvořák、Darren J. Mansfield、Pavel Kočovský
DOI:10.1021/jo9821776
日期:1999.4.1
The molybdenum(II) complexes Mo(CO)(5)(OTf)(2) (7a), [Mo(CO)(4)Br(2)](2) (8a), their tungsten(II) congeners 7b and 8b, and bimetallic complex Mo(CO)(3)(MeCN)(2)(SnCl(3))Cl (9a) have been found to catalyze the C-C bond-forming allylic substitution with silyl enol ethers derived from beta-dicarbonyls (e.g., 16 + 30 --> 46) or from simple ketones (e.g., 16 + 32 --> 50), aldehydes, and esters as nucleophiles
钼(II)络合物Mo(CO)(5)(OTf)(2)(7a),[Mo(CO)(4)Br(2)](2)(8a),它们的钨(II)同系物7b和8b,发现双金属配合物Mo(CO)(3)(MeCN)(2)(SnCl(3))Cl(9a)可以催化衍生自β-二羰基的甲硅烷基烯醇醚形成CC键的烯丙基取代(例如16 + 30-> 46)或简单的酮(例如16 + 32-> 50),醛和酯在温和的条件下(室温,1-2小时)作为亲核试剂。甲醇作为原型氧亲核试剂,以相似的方式反应(例如16 + MeOH-> 43)。机械和立体化学实验表明路易斯酸催化而不是金属模板控制的过程。