Polymer-Supported, Carbon Dioxide-Protected N-Heterocyclic Carbenes: Synthesis and Application in Organo- and Organometallic Catalysis
作者:Gajanan Manohar Pawar、Michael R. Buchmeiser
DOI:10.1002/adsc.200900658
日期:2010.3.22
2‐ylmethyl)‐3‐(2‐Pr)‐3,4,5,6‐tetrahydropyrimidin‐2‐ylidine](COD) (Ir‐1) were used as homogeneous analogues and their reactivity in the above‐mentioned reactions was compared with that of the supported catalytic systems. In all reactions investigated, the TONs achieved with the supported systems were very similar to the ones obtained with the unsupported, homogeneous ones, the turn‐over frequencies
描述了树脂支撑的,二氧化碳保护的N杂环卡宾(NHC)的合成及其在有机催化和有机金属催化中的用途。树脂结合的二氧化碳保护的NHC基催化剂是通过1,4,4a,5,8,8a-六氢-1,4,5,8- exo,endo - dimethanonaphthalene(DMNH6)的开环复分解共聚制备的)与3-(双环[2.2.1]庚-5-en-2-基甲基)-1-(2-丙基)-3,4,5,6-四氢嘧啶-1-基-2-羧酸盐(M1) ,使用定义明确的Schrock催化剂Mo [ N -2,6-(2-Pr)2 -C 6 H 3 ](CHCMe 2 Ph)(OCMe 3)2并用于一系列有机催化反应,即,用于异氰酸酯的三聚反应,以及用于羰基化合物的氰基硅烷化。在后一反应中,周转数(TON)达到5000。此外,聚合物支撑的,二氧化碳保护的N杂环卡宾是各种聚合物支撑的金属配合物的优异祖先。它装有一系列铑(I),铱(I)