Synthesis of 2-substituted pyrimidines and benzoxazoles via a visible-light-driven organocatalytic aerobic oxidation: enhancement of the reaction rate and selectivity by a base
作者:Lin Wang、Zhi-Gang Ma、Xiao-Jing Wei、Qing-Yuan Meng、Deng-Tao Yang、Shao-Fu Du、Zi-Fei Chen、Li-Zhu Wu、Qiang Liu
DOI:10.1039/c4gc00337c
日期:——
An efficient visible-light-driven photocatalytic oxidation of various 2-substituted dihydropyrimidines and phenolic imines has been achieved using an organic photocatalyst eosin Y bis(tetrabutyl ammonium salt) (TBA-eosin Y) and inexpensive oxidant molecular oxygen. With the aid of a base, significantly enhanced photoinduced electron transfer from substrates dihydropyrimidines or phenolic imines to the excited state of TBA-eosin Y has enabled the aerobic oxidation to yield 2-(methylthio)pyrimidines or 2-arylbenzoxazoles selectively.
Aerobic copper-promoted oxidative dehydrosulfurative carbon–oxygen cross-coupling of 3,4-dihydropyrimidine-1<i>H</i>-2-thiones with alcohols
作者:Jihong Lee、Yujeong Kwon、Dong-Chan Lee、Jeong-Hun Sohn
DOI:10.1039/d1ra07713a
日期:——
A wide range of readily available DHPMs and alcohols makes the presented reaction an attractive method to access biologically valuable 2-alkoxypyrimidine derivatives with rapid diversification.
Dehydrosulfurative C–N Cross-Coupling and Concomitant Oxidative Dehydrogenation for One-Step Synthesis of 2-Aryl(alkyl)aminopyrimidines from 3,4-Dihydropyrimidin-1<i>H</i>-2-thiones
作者:Nguyen Huu Trong Phan、Hyeji Kim、Hyunik Shin、Hee-Seung Lee、Jeong-Hun Sohn
DOI:10.1021/acs.orglett.6b02617
日期:2016.10.7
A method for the synthesis of 2-aryl(alkyl)aminopyrimidinesfrom readily available 3,4-dihydropyrimidin-1H-2-thiones (DHPMs) via dehydrosulfurative C–N cross-coupling and concomitant oxidative dehydrogenation under a Pd/Cu catalytic system is described. This reaction protocol provides unprecedented diversity of fully substituted 2-aryl(alkyl)aminopyrimidines in a single step from a wide range of DHPMs
一种在Pd / Cu催化体系下通过脱硫C–N交叉偶联和伴随的氧化脱氢从容易获得的3,4-二氢嘧啶-1 H -2-硫酮(DHPM)合成2-芳基(烷基)氨基嘧啶的方法描述。该反应方案只需一步即可从多种DHPM和胺偶联伙伴中提供前所未有的完全取代的2-芳基(烷基)氨基嘧啶多样性。
Oxidative Dehydrosulfurative Cross-Coupling of 3,4-Dihydropyrimidine-2-thiones with Alkynes for Access to 2-Alkynylpyrimidines
作者:Ngoc Son Le Pham、Hyunik Shin、Jun Yong Kang、Jeong-Hun Sohn
DOI:10.1021/acs.joc.0c00091
日期:2020.4.3
(DHPMs) via dehydrosulfurative Sonogashira cross-coupling with concomitant oxidative dehydrogenation using a Pd/Cu catalytic system. Together with the ready availability of DHPMs possessing various substituents at the C4–C6 positions, this transformation offers rapid and general access to diverse 2-alkynylpyrimidine derivatives.
描述了一种通过Pd / Cu催化体系通过脱硫Sonogashira交叉偶联与伴随的氧化脱氢从3,4-二氢嘧啶-1 H -2-硫酮(DHPM)一步合成2-炔基嘧啶的反应方法。连同在C4–C6位置具有各种取代基的DHPM的现成可用性,这种转变为获得各种2-炔基嘧啶衍生物提供了快速而通用的途径。
Dehydrosulfurative arylation with concomitant oxidative dehydrogenation for rapid access to pyrimidine derivatives
作者:Hyeji Kim、Nguyen Huu Trong Phan、Hyunik Shin、Hee-Seung Lee、Jeong-Hun Sohn
DOI:10.1016/j.tet.2017.10.010
日期:2017.11
This report describes a cascade reaction method for the synthesis of 2-arylpyrimidine derivatives via dehydrosulfurative carbon-carbon cross-coupling and concomitant oxidative dehydrogenation under a Pd/Cu catalytic system. It provides rapid and general access to a diverse range of 2-arylpyrimidines in a single step from a wide range of 3,4-dihydropyrimidin-1H-2-thiones (DHPMs) and arylboronic acids
该报告描述了在Pd / Cu催化体系下通过脱氢硫化碳-碳交叉偶联和伴随的氧化脱氢合成2-芳基嘧啶衍生物的级联反应方法。它可从一个范围广泛的3,4-二氢嘧啶-1 H -2-硫酮(DHPM)和芳基硼酸一步一步快速,通用地获得各种2-芳基嘧啶。