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。
Reaction of Mercaptoacetate and Halides Containing Activated Methylenes with Thiocarbamoylimidates: A Novel Approach to the Synthesis of Aminothiazole Derivatives
作者:K. Dridi、M. L. EL Efrit、B. Baccar、H. Zantour
DOI:10.1080/00397919808005086
日期:1998.1
Abstract The reaction of N-thiocarbamoylimidates 1 with methyl thioglycolate leads to the formation of 4-arylamino-5-methoxycarbonylthiazoles 2. The condensation of the same imidates 1 on ethylbromoacetate, benzyl bromide and chloroacetonitrile provides the corresponding 2-arylaminothiazoles 4.
1. DieKondensationsfähigkeit von 2-Methylthiazolverbindungen gegenüber Benzaldehyd wurde an zahlreichen Beispielen, so auch am 2-Methylthiazol, nachgeprüft und die Struktur der so erhaltenen 2-Styrylthiazolverbindungen durch direkte Synthese aus Zimtsäurethioamid und Halogencarbonylverbindungen belegt.
Synthesis of 5-Phenylthiazolamines by Using Thiourea as an α-Bromination Shuttle
作者:Irwan Iskandar Roslan、Kian-Hong Ng、Gaik-Khuan Chuah、Stephan Jaenicke
DOI:10.1002/ejoc.201601410
日期:2017.1.18
A straightforward synthesis of 5-phenylthiazolamines via coupling of thiourea with phenylacetones, phenylacetophenones and β-tetralone has been developed. Thiourea acts as a substrate and an -bromination shuttle, transferring Br from the brominating reagent, CBrCl3, to the β-carbon of the carbonyl moiety before triggerring a series of steps to form the final product. Isolated yields of 80 to 95
traceless linker for solid-phase chemistry. This linker technology was used to develop a multistep solid-phasesynthesis of an antibiotic that is active against Mycobacterium tuberculosis. Furthermore, we describe an efficient method for the traceless synthesis of 2-aminothiazoles that display dual inhibitory activity against the receptor tyrosine kinases VEGFR-2 and Tie-2. The synthesis method proceeds