Iridium-Catalyzed Annulation of Salicylimines with 1,3-Dienes
摘要:
Iridium-catalyzed annulation of salicylimines with 1,3-dienes gave high yields of the corresponding 4-aminochromanes with high stereoselectivity. The use of a chiral diene ligand enabled the asymmetric reaction to give 4-aminochromanes with high enantioselectivity.
Efficient and Convenient Procedure for Preparation ofN‐Sulfonylimines Catalyzed by Montmorillonite K‐10
摘要:
A general and practical chemical route to the synthesis of N-sulfonylimines using montmorillonite K-10 as the catalyst is described. This method provides several advantages such as operational simplicity, short reaction time, using of inexpensive materials, noncorrosivity, lack of pollution, and high yields.
A Solvent‐Free Procedure for Synthesis of <i>N</i>‐Sulfonylimines Using Microwave Irradiation Catalyzed by ZrO<sub>2</sub>/S<sub>2</sub>O<sub>8</sub> <sup>2−</sup> Solid Superacid
作者:Tongshou Jin、Guoliang Feng、Mina Yang、Tongshuang Li
DOI:10.1081/scc-120030315
日期:2004.12.31
A solvent-free synthesis of N-sulfonyli mines from aldehydes with sulfo- namides is described using ZrO2/S2O82- as catalyst under microwave irradiation. This method is fast and high yielding for a range of substrates.