Programmed synthesis of arylthiazoles through sequential C–H couplings
作者:Satoshi Tani、Takahiro N. Uehara、Junichiro Yamaguchi、Kenichiro Itami
DOI:10.1039/c3sc52199k
日期:——
A programmed synthesis of privileged arylthiazoles via sequential C–Hcouplings catalyzed by palladium or nickel catalysts has been accomplished. This versatile protocol can supply all possible arylthiazole substitution patterns (2-aryl, 4-aryl, 5-aryl, 2,4-diaryl, 2,5-diaryl, 4,5-diaryl, and 2,4,5-triaryl) from an unfunctionalized thiazole platform by 11 distinct synthetic routes. We have generated
Solid state synthesis of 2-aroylbenzo[b]furans, 1,3-thiazoles and 3-aryl-5,6-dihydroimidazo[2,1-b][1,3]thiazoles from α-tosyloxyketones using microwave irradiation †
作者:Rajender S. Varma、Dalip Kumar、Per J. Liesen
DOI:10.1039/a807563h
日期:——
3]thiazoles are described from readily accessible α-tosyloxyketones and mineral oxides in processes that are accelerated by exposure to microwaves. The 2-aroylbenzo[b]furans are readily obtained from salicylaldehydes and α-tosyloxyketones in the presence of solid potassium fluoride doped alumina (KF–Al2O3) whereas montmorillonite K-10 clay provides 1,3-thiazoles from thioamides and α-tosyloxyketones
2-芳酰基苯并的迅速无溶剂合成[ b ]呋喃,1,3-噻唑和3-芳基-5,6-二氢咪唑并[2,1- b ] [1,3]是从容易获得α-tosyloxyketones描述噻唑类和通过暴露于微波而加速的过程中的矿物氧化物。在固态氟化钾掺杂的氧化铝(KF–Al 2 O 3)存在下,从水杨醛和α-甲苯磺酰氧基酮很容易获得2-芳基苯并[ b ]呋喃,而蒙脱土K-10粘土从硫酰胺和α提供了1,3-噻唑。 -甲苯磺酰氧基酮。同样,亚乙基硫脲和α-甲苯磺酰氧基酮可提供桥头氮杂环,3-芳基-5,6-二氢咪唑并[2,1- b] [1,3]噻唑类,其收率很高,在传统的加热条件下不易获得。
The lipase-catalyzed, ultrasound-assisted synthesis presented in this study represents a greener and more sustainable alternative to traditional synthetic pathways for these important compounds, offering promising potential for applications in medicinal chemistry and drug development. This approach holds the promise of advancing the field of thiazole synthesis, contributing to more sustainable and efficient
Visible-light-induced C–S bond formation in the synthesis of 2,4-disubstituted thiazoles through cascade difunctionalization of acetophenone: a greener approach
A novel approach for the synthesis of 2,4-disubstituted thiazoles from methyl aryl ketones, N-bromo-succinimide (NBS), and thioamide in water as a green reaction medium through visible-light irradiation is reported.
One-Pot Preparation of Aromatic Amides, 4-Arylthiazoles, and 4-Arylimidazoles from Arenes
作者:Takahiro Yamamoto、Hideo Togo
DOI:10.1002/ejoc.201800730
日期:2018.8.15
Primary aromatic amides, 4‐arylthiazoles, and 4‐arylimidazoles were smoothly obtained from arenes in good yield in onepot via aryl α‐bromoacetylarenes, which were obtained by reacting simple arenes with α‐bromoacetyl chloride and AlCl3, followed by the reaction with molecular iodine and aq. NH3, thioamides, or amidine under transition‐metal‐free conditions.