Copper(<scp>i</scp>) chloride promoted Csp<sup>2</sup>–N cross-coupling of 1,2-di(pyrimidin-2-yl) disulfides with amines: an efficient approach to obtain C2-amino functionalized pyrimidines
作者:Kai-Jie Wei、Zheng-jun Quan、Zhang Zhang、Yu-xia Da、Xi-cun Wang
DOI:10.1039/c5ob02535d
日期:——
The copper(I)-promoted cross-coupling of 1,2-di(pyrimidin-2-yl) disulfides with aromatic amines and aliphatic amines to deliver C–N coupling products in moderate to good yields is reported in this paper. Central to this strategy is the conversion of disulfides into aryl- and alkyl amines by a copper-promoted chemoselective C–S bond cleavage.
A mild and rapid procedure to the synthesis of 2-substituted pyrimidines was developed via sequential functionalization of easily available Biginelli 3,4-dihydropyrimidine-2(1H)-ones via oxidation, esterification, followed by cross-couplingreaction of pyrimidin-2-yl sulfonates with N, S, and O nucleophiles in PEG-400 as a green reaction medium at room temperature.
通过氧化、酯化以及嘧啶-2-的交叉偶联反应对容易获得的 Biginelli 3,4-二氢嘧啶-2(1H)-酮进行顺序功能化,开发了一种温和且快速的合成 2-取代嘧啶的方法在室温下作为绿色反应介质,在 PEG-400 中使用 N、S 和 O 亲核试剂制备基磺酸盐。
Synthesis of C2-functionalized pyrimidines from 3,4-dihydropyrimidin-2(1H)-ones by the Mitsunobu coupling reaction
作者:Xi-Cun Wang、Guo-Jun Yang、Xiao-Dong Jia、Zhang Zhang、Yu-Xia Da、Zheng-Jun Quan
DOI:10.1016/j.tet.2011.02.046
日期:2011.5
The Biginelli 3,4-dihydropyrimidin-2(1H)-one was converted to various C2-multifunctionalized pyrimidines via the dehydrogenation and Mitsunobu reaction using amines, alcohols, phenols and carboxylic acids as nucleophiles. A possible mechanism was also proposed to rationalize the formation of products.
Molecular iodine-mediated S–N and C–N cross-coupling and oxidative aromatization of 3,4-dihydropyrimidin-2(1H)-thiones with secondary amines
作者:Zheng-Jun Quan、Ying Lv、Zhong-Jie Wang、Zhang Zhang、Yu-Xia Da、Xi-Cun Wang
DOI:10.1016/j.tetlet.2013.01.113
日期:2013.4
A domino S-N and C-N coupling/oxidative aromatization process to synthesize 2-aminothio-phenylpyrimidines and 2-amino-phenylpyrimidines by S-N and C-N cross-coupling reactions is described. This methodology couples 3,4-dihydropyrimidine-2-thiones and secondary amines catalyzed by molecular iodine. Remarkably the C-N coupled product was obtained via a desulfitative coupling-aromatization reaction in one-pot reaction. (C) 2013 Elsevier Ltd. All rights reserved.