A simple and efficient method has been developed for the synthesis of 2-aminothiazoles from α-bromo ketones in one-potusing a supported reagents system, KSCN/SiO2–RNH3OAc/Al2O3, in which α-bromo ketone reacts first with KSCN/SiO2 and the product, α-thiocyano ketone, reacts with RNH3OAc/Al2O3 to give the final product, 2-aminothiazole, in high yield.
一种简单且有效的方法已用于从α溴酮-2-氨基噻唑在一锅合成中使用负载的试剂系统被开发出来,KSCN /二氧化硅2 -RNH 3 OAC / Al的2 Ó 3,其中α溴酮首先与KSCN / SiO 2反应,然后产物α-硫氰基酮与RNH 3 OAc / Al 2 O 3反应,以高收率得到最终产物2-氨基噻唑。
Synthesis of heteroleptic copper(I) complexes with phosphine-functionalized thiosemicarbazones: An efficient catalyst for regioselective N -alkylation reactions
作者:Rangasamy Ramachandran、Govindan Prakash、Paranthaman Vijayan、Periasamy Viswanathamurthi、Jan Grzegorz Malecki
DOI:10.1016/j.ica.2017.05.003
日期:2017.8
spectral and analytical technique. The single-crystal X-ray diffraction study of complexes 2 and 3 confirmed the formation of complexes with Cu(I) ion, coordinated through P,N,S-donor atoms from the phosphino-thiosemicarbazone ligands. All the copper(I) complexes have been demonstrated as highly efficient catalysts for the synthesis of N-alkylated heterocyclic amine by the coupling of primary amines with
A simple and efficient method has been developed for the synthesis of 2-aminothiazoles and N-allylthioureas from commercially available materials in one pot by using a supported reagents system, KSCN/SiO2-RNH3OAc/Al2O3, in which alpha-halo ketone reacts first KSCN/SiO2 and the product, alpha.-thiocyanatoketone, reacts with RNH3OAc/Al2O3 to give the final product, 2-aminothiazoles, in good yield and allyl bromide reacts with KSCN/SiO2 and the product, allyl isothiocyanate, reacts with RNH3OAc/Al2O3 to give N-allylthiourea. (c) 2006 Elsevier Ltd. All rights reserved.
Direct N-alkylation of amino-azoles with alcohols catalyzed by an iridium complex/base system
作者:Feng Li、Haixia Shan、Lin Chen、Qikai Kang、Po Zou
DOI:10.1039/c1cc14861c
日期:——
The direct and regioselective N-alkylation of amino-azoles to the corresponding 2-N-(alkylamino)azoles using various alcohols as alkylating agents with good to excellent yields has been accomplished by an iridium complex/base system.