Direct metal-free O-arylation of Biginelli 4-aryl-6-methyl-pyrimidine-2(1H)-one derivatives using diaryliodonium salts
摘要:
4-Aryl-6-methyl-pyrimidine-2(1H)-one scaffolds of Biginelli type were subjected to C-O cross-coupling reactions using symmetrical diaryliodonium salts under transition metal-free conditions to afford 2-aryl-oxy pyrimidine derivatives in good to excellent yields. (C) 2014 Elsevier Ltd. All rights reserved.
A novel combination of (diacetoxyiodo)benzene and tert-butylhydroperoxide for the facile oxidative dehydrogenation of 3,4-dihydropyrimidin-2(1H)-ones
作者:Nandkishor N. Karade、Sumit V. Gampawar、Jeevan M. Kondre、Girdharilal B. Tiwari
DOI:10.1016/j.tetlet.2008.09.045
日期:2008.11
A clean and efficient oxidative dehydrogenation of 3,4-dihydropyrimidin-2(1H)-ones to 1,2-dihydropyrimidines has been achieved through a novel combination of (diacetoxyiodo)benzene and tert-butylhydroperoxide in CH2Cl2.
Novel and Chemoselective Dehydrogenation of 3,4-Dihydropyrimidin-2(1H)-ones with 1,4-Bis(triphenylphosphonium)-2-butene Peroxodisulfate
作者:Maryam Gorjizadeh
DOI:10.5012/bkcs.2013.34.6.1751
日期:2013.6.20
3,4-Dihydropyrimidin-2(1H)-ones were efficiently converted into the corresponding pyrimidin-2(1H)-ones in high yields within a short period of time on treatment with aqueous acetonitrile using 1,4-bis(triphenylphosphonium)-2-butene peroxodisulfate. Chemoselective oxidation of 3,4-dihydropyrimidin in the presence of other oxidizable functional groups was also achieved by this reagent.
An efficient and rapid dehydrogenation of 4-aryl-3,4-dihydropyrimidin-2(1H)-ones (DHPMs) using CAN/HCl
作者:Hitendra N. Karade、Jyotiranjan Acharya、Mahabir Parshad Kaushik
DOI:10.1016/j.tetlet.2012.08.017
日期:2012.10
An efficient and operationally simple method for the dehydrogenation of 4-aryl-3,4-dihydropyrimidin-2(1H)-ones (DHPMs) has been developed using CAN/HCl. (C) 2012 Elsevier Ltd. All rights reserved.
Palladium-catalyzed dehydrogenation of dihydro-heterocycles using isoprene as the hydrogen acceptor without oxidants
作者:Xiao-Jun Liu、Wen-Peng Wang、Cong-De Huo、Xi-Cun Wang、Zheng-Jun Quan
DOI:10.1039/c6cy02038k
日期:——
efficient and general method for Pd-catalyzed dehydrogenative aromatization of dihydro-heteroatom compounds without external O2 and H2 is first described. The protocol firstly uses isoprene as a hydrogenacceptor. Various dihydro-heterocycles including dihydropyrimidinones, dihydropyrimidines and dihydropyridines can be dehydrogenated to produce the corresponding aromatic heterocyclic compounds.
Direct metal-free O-arylation of Biginelli 4-aryl-6-methyl-pyrimidine-2(1H)-one derivatives using diaryliodonium salts
作者:Prerana B. Thorat、Nitin A. Waghmode、Nandkishor N. Karade
DOI:10.1016/j.tetlet.2014.08.079
日期:2014.10
4-Aryl-6-methyl-pyrimidine-2(1H)-one scaffolds of Biginelli type were subjected to C-O cross-coupling reactions using symmetrical diaryliodonium salts under transition metal-free conditions to afford 2-aryl-oxy pyrimidine derivatives in good to excellent yields. (C) 2014 Elsevier Ltd. All rights reserved.