Synthesis and X-ray characterization of 2,5,6-trisubstituted imidazo[2,1-b][1,3,4]thiadiazole derivatives
作者:Yu-Xia Da、Ji-Hua Zhu、Zhang Zhang、Xiao-Dong Jia、Cai-Xia Yang、Zheng-Jun Quan
DOI:10.1002/jhet.678
日期:2012.1
AbstractA series of 2,5,6‐trisubstituted imidazo[2,1‐b][1,3,4]thiadiazoles via Mannich reaction of imidazo[2,1‐b][1,3,4]thiadiazoles with morpholine and formaldehyde were synthesized. Structures of all the newly synthesized compounds are well supported by spectral data such as IR, NMR, Mass, and Elemental analysis. Compound 3a has been confirmed by X‐ray diffraction studies. J. Heterocyclic Chem., (2012).
A Novel Method for N3-Functionalized Aminoimidazolines and Aminopyrimidines by Aza-Michael Additions of Aminoimidazolines and Aminopyrimidines to α,β-Unsaturated Carbonyl Compounds
作者:Xi-Cun Wang、Cheng-Wei Lv、Zheng-Jun Quan、Guo-Li Huang、Wen-Long Yang
DOI:10.3987/com-07-11118
日期:——
An efficient and convenient procedure is described for the preparation of N3-functionalized aminoimidazolines and aminopyrimidines through the aza-Michael additions of aminoimidazolines and aminopyrimidines with alpha, beta-unsaturated carbonyl compounds catalyzed by KF/Al(2)O(3). This method offers a novel and efficient protocol for the N3-functionalized aminoimidazolines and aminopyrimidines with good regioselectivity and high purity under mild conditions.