Among all metathesisreactions known to date in organic chemistry, the metathesis of multiple bonds such as alkenes and alkynes has evolved into one of the most powerful methods to construct molecular complexity. In contrast, metathesisreactions involving single bonds are scarce and far less developed, particularly in the context of synthetically valuable ring‐closing reactions. Herein, we report
Reactions of diols with dimethyl carbonate in the presence of W(CO)6 and Co2(CO)8
作者:R. I. Khusnutdinov、N. A. Shchadneva、Yu. Yu. Mayakova
DOI:10.1134/s1070428014070057
日期:2014.7
Baltes,H. et al., Chemische Berichte, 1978, vol. 111, p. 1294 - 1314
作者:Baltes,H. et al.
DOI:——
日期:——
Hydrogen‐Bonding Catalyzed Ring‐Closing C−O/C−O Metathesis of Aliphatic Ethers over Ionic Liquid under Metal‐Free Conditions
作者:Huan Wang、Yanfei Zhao、Fengtao Zhang、Yunyan Wu、Ruipeng Li、Junfeng Xiang、Zhenpeng Wang、Buxing Han、Zhimin Liu
DOI:10.1002/anie.202004002
日期:2020.7.13
have wide applications, and their efficient and green synthesis is very interesting. Herein, we report hydrogen‐bonding catalyzed ring‐closing metathesis of aliphatic ethers to O‐heterocycles over ionic liquid (IL) catalyst under metal‐ and solvent‐free conditions. The IL 1‐butylsulfonate‐3‐methylimidazolium trifluoromethanesulfonate ([SO3H‐BMIm][OTf]) is discovered to show outstanding performance, better