Microwave-assisted C–N and C–S bond-forming reactions: an efficient three-component domino sequence for the synthesis of sulfoether-decorated imidazo[1,2-a]pyridines
作者:Haiying Zhan、Hua Cao、Huifang Qiu、Naiying Li、Longbin Chen、Jingyun Liu、Huiyin Cai、Jingwen Tan
DOI:10.1039/c5ra05377c
日期:——
An efficient and simple microwave-assistedthree-componentreaction for the formation of imidazo[1,2-a]pyridine derivatives in the presence of F3CCO2H has been described. The three-componentreaction of 3-phenylpropiolaldehyde, pyridin-2-amines and thiols gives the desired products in good yields. It represents an efficient approach for the formation of C–N and C–S bonds under microwave irradiation
已经描述了在F 3 CCO 2 H存在下形成咪唑并[1,2- a ]吡啶衍生物的有效且简单的微波辅助三组分反应。3-苯基丙醛,吡啶-2-胺和硫醇的三组分反应以高收率得到所需产物。它代表了在微波辐射下形成C–N和C–S键的有效方法。
Transition Metal-Mediated C═O and C═C Bond-Forming Reactions: A Regioselective Strategy for the Synthesis of Imidazo[1,2-<i>a</i>]pyridines and Imidazo[1,2-<i>a</i>]pyrazines
A novel and convenient transformation for the regiospecific synthesis of functionalizedimidazo[1,2-a]pyridine aldehydes/ketones and 3-vinyl imidazo[1,2-a]pyridines has been developed via copper(I)- and palladium(II)-catalyzed cyclization. The one-pot reaction proceeds smoothly with commercially available catalysts and affords the products in moderate to good yields. It represents an efficient approach
Syntheses of Pyridine C-Nucleosides as Analogues of the Natural Nucleosides dC and dU
作者:Zhenhua Sun、Shahadat Ahmed、Larry W. McLaughlin
DOI:10.1021/jo060066y
日期:2006.3.31
The syntheses of four pyrimidine C-nucleosides are described. These derivatives are designed as mimics of dC and dU, and in that respect, each can form two hydrogen bonds with complementary dG or dA residues. The minor groove O2 carbonyl in each derivative is replaced by a fluorine or a methyl group. The key carbon−carbon bond connecting the heterocycle to the carbohydrate is formed using a Heck-type