Vanadium(IV) acetylacetonate catalyzed stereoselective synthesis of β-enaminoesters and β-enaminones
作者:Rajibul A. Laskar、Naznin A. Begum、Mohammad Hedayetullah Mir、Shahzad Ali、Abu T. Khan
DOI:10.1016/j.tetlet.2012.11.051
日期:2013.1
and stereoselective procedure has been described for the synthesis of a series of β-enaminoesters and β-enaminones by vanadium(IV) acetylacetonate [VO(acac)2] catalyzed reaction of β-ketoesters and 1,3-diketones with both aliphatic and aromatic amines. X-ray crystallographicstudies of some representative compounds corroborate two types of structural geometry formed by inter-molecular as well as intra-molecular
Silver-Catalyzed Cross-Coupling of Isocyanides and Active Methylene Compounds by a Radical Process
作者:Jianquan Liu、Zhenhua Liu、Peiqiu Liao、Lin Zhang、Tao Tu、Xihe Bi
DOI:10.1002/anie.201504254
日期:2015.9.1
Isocyanides are versatile building blocks, and have been extensively exploited in CH functionalization reactions. However, transition‐metal‐catalyzed direct CH functionalization reactions with isocyanides suffer from over‐insertion of isocyanides. Reported herein is a radical coupling/isomerization strategy for the cross‐coupling of isocyanides with activemethylenecompounds through silver‐catalysis
transesterification reaction has been developed which affords various types of esters under very mild conditions. The reaction was applied to the stereo- and regioselective synthesis of trisubstituted α,β-unsaturatedcarboxylicacids.