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A General Method for Preparation of Metal Carbenes via Solution- and Polymer-Based Approaches
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2005-11-01 , DOI: 10.1021/ja050781+
Mark Gandelman 1 , Kyaw M. Naing 1 , Boris Rybtchinski 1 , Elena Poverenov 1 , Yehoshoa Ben-David 1 , Nissan Ashkenazi 1 , Regis M. Gauvin 1 , David Milstein 1
Affiliation  

A new general, synthetically simple, and safe method for the preparation of metal carbene complexes, which is based on diphenyl sulfonium salts as carbenoid precursors, has been developed, and its scope and applications were studied. In general, deprotonation of a sulfonium salt with a base results in a sulfur ylide, which, in turn, reacts with an appropriate metal precursor to give the corresponding metal carbene complex. Thus, starting from benzyldiphenylsulfonium salt, the complexes (PCX)Rh=CHPh (X = P, N) were prepared in quantitative yield. Syntheses of Grubbs' catalyst, (PCy(3))(2)Cl(2)Ru=CHPh, and of Werner's carbene, [Os(=CHPh)HCl(CO)(P(i)Pr(3))(2)], were achieved by this method. Novel trans-bisphosphine Rh and Ir carbenes, ((i)Pr(3)P)(2)(Cl)M=CHPh, which could not be prepared by other known methods, were synthesized by the sulfur ylide approach. The method is not limited to metal benzylidenes, as demonstrated by the preparation of the Ru vinyl-alkylidene, (PCy(3))(2)Cl(2)Ru=CH-CH=CH(2), methoxycarbonyl-alkylidene, (PCy(3))(2)Cl(2)Ru=CH(CO(2)Me), and alkylidene (PCy(3))(2)Cl(2)Ru=CH(CH(3)), (PCy(3))(2)Cl(2)Ru=CH(2) compounds. The problem of recycling of starting materials as well as the issue of facile purification of the product metal carbene complex were addressed by the synthesis of a polymer-supported diarylsulfide, the carrier of the carbenoid unit in the process. Based on the sulfur ylide route, a methodology for the synthesis of metallocarbenes anchored to a polymer via the carbene ligand, using a commercial Merrifield resin, was developed.

中文翻译:

通过基于溶液和聚合物的方法制备金属卡宾的一般方法

开发了一种以二苯基锍盐为类卡宾前驱体制备金属卡宾配合物的通用、合成简单、安全的新方法,并对其范围和应用进行了研究。通常,用碱对锍盐进行去质子化会产生硫叶立德,而硫叶立德又与合适的金属前体反应生成相应的金属卡宾配合物。因此,从苄基二苯基锍盐开始,以定量收率制备配合物(PCX)Rh=CHPh(X=P,N)。Grubbs 催化剂 (PCy(3))(2)Cl(2)Ru=CHPh 和 Werner 卡宾的合成 [Os(=CHPh)HCl(CO)(P(i)Pr(3))(2) )], 是通过这种方法实现的。新型反式双膦 Rh 和 Ir 卡宾,((i)Pr(3)P)(2)(Cl)M=CHPh,无法通过其他已知方法制备,硫叶立德法合成。该方法不限于金属亚苄基,如制备 Ru 乙烯基亚烷基,(PCy(3))(2)Cl(2)Ru=CH-CH=CH(2),甲氧基羰基亚烷基,( PCy(3))(2)Cl(2)Ru=CH(CO(2)Me), 亚烷基 (PCy(3))(2)Cl(2)Ru=CH(CH(3)), (PCy (3))(2)Cl(2)Ru=CH(2) 化合物。通过合成聚合物负载的二芳基硫醚,该过程中卡宾单元的载体,解决了起始材料的回收问题以及产物金属卡宾配合物的容易纯化的问题。基于硫叶立德路线,开发了一种使用商业 Merrifield 树脂合成通过卡宾配体固定在聚合物上的金属卡宾的方法。如 Ru 乙烯基亚烷基的制备所示,(PCy(3))(2)Cl(2)Ru=CH-CH=CH(2),甲氧基羰基亚烷基,(PCy(3))(2)Cl (2)Ru=CH(CO(2)Me),亚烷基(PCy(3))(2)Cl(2)Ru=CH(CH(3)),(PCy(3))(2)Cl( 2)Ru=CH(2) 化合物。通过合成聚合物负载的二芳基硫醚,该过程中卡宾单元的载体,解决了起始材料的回收问题以及产物金属卡宾配合物的容易纯化的问题。基于硫叶立德路线,开发了一种使用商业 Merrifield 树脂合成通过卡宾配体固定在聚合物上的金属卡宾的方法。如 Ru 乙烯基亚烷基的制备所示,(PCy(3))(2)Cl(2)Ru=CH-CH=CH(2),甲氧基羰基亚烷基,(PCy(3))(2)Cl (2)Ru=CH(CO(2)Me),亚烷基(PCy(3))(2)Cl(2)Ru=CH(CH(3)),(PCy(3))(2)Cl( 2)Ru=CH(2) 化合物。通过合成聚合物负载的二芳基硫醚,该过程中卡宾单元的载体,解决了起始材料的回收问题以及产物金属卡宾配合物的容易纯化的问题。基于硫叶立德路线,开发了一种使用商业 Merrifield 树脂合成通过卡宾配体固定在聚合物上的金属卡宾的方法。(PCy(3))(2)Cl(2)Ru=CH(2) 化合物。通过合成聚合物负载的二芳基硫醚,该过程中卡宾单元的载体,解决了起始材料的回收问题以及产物金属卡宾配合物的容易纯化的问题。基于硫叶立德路线,开发了一种使用商业 Merrifield 树脂合成通过卡宾配体固定在聚合物上的金属卡宾的方法。(PCy(3))(2)Cl(2)Ru=CH(2) 化合物。通过合成聚合物负载的二芳基硫醚,该过程中卡宾单元的载体,解决了起始材料的回收问题以及产物金属卡宾配合物的容易纯化的问题。基于硫叶立德路线,开发了一种使用商业 Merrifield 树脂合成通过卡宾配体固定在聚合物上的金属卡宾的方法。
更新日期:2005-11-01
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