Water as the Reaction Medium for Intermolecular C–H Alkane Functionalization in Micellar Catalysis
作者:María Álvarez、Riccardo Gava、Manuel R. Rodríguez、Silvia G. Rull、Pedro J. Pérez
DOI:10.1021/acscatal.6b03669
日期:2017.5.5
A series of alkanes CnH2n+2 have been functionalized in water as the reaction medium, using a silver-based catalyst, upon the insertion of carbene (CHCO2Et from N2CHCO2Et) groups into the carbon–hydrogenbonds of hexane, cyclohexane, or 2-methylbutane, among others. The regioselectivity toward the distinct reaction sites is identical to that found in neat alkane, the water-based system allowing the
在插入卡宾(N 2 CHCO 2中的CHCO 2 Et)后,使用银基催化剂在水中将一系列烷烃C n H 2 n +2作为反应介质进行了功能化。Et)包括己烷,环己烷或2-甲基丁烷等的碳氢键。对不同反应位点的区域选择性与在纯烷烃中发现的区域选择性相同,该水基体系允许使用短得多的过量烃。这是在水中用这种方法对烷烃进行分子间官能化的第一个例子。在这种性质的空前的串联反应中,官能化的烷烃部分地引入第二个碳烯单元以提供α-(酰氧基)乙酸酯。
Silver-Catalyzed Functionalization of Esters by Carbene Transfer: The Role of Ylide Zwitterionic Intermediates
作者:Riccardo Gava、M. Ángeles Fuentes、Maria Besora、Tomás R. Belderrain、Kane Jacob、Feliu Maseras、Michel Etienne、Ana Caballero、Pedro J. Pérez
DOI:10.1002/cctc.201402241
日期:2014.8
The reaction of esters with ethyl diazoacetate catalyzed by the complex [F27–TpAg(acetone)] generates α‐(acyloxy)acetates in moderate to high yields. This is a novel transformation in the context of carbene‐transfer reactions from diazo compounds that, according to experimental and theoretical data, is suggested to occur through zwitterionic intermediates.