A convenient synthesis of di- and trisubstituted 2-aminoimidazoles from 1-amidino-3-trityl-thioureas
摘要:
Convenient synthesis of 2-amino-1,5-disubstituted and 2-amino-1,4,5-trisubstituted imidazoles has been reported using readily available starting materials and simple reagents under mild conditions. Guanylation of 1-amidino-3-trityl-thioureas 1 and 7 using mercury(II) chloride (Caution) as a thiophile resulted in corresponding guanidines 2 and 8 which on reaction with alpha-bromo ketones yielded 2-tritylaminoimidazoles. Deprotection of 2-tritylaminoimidazoles using trifluoroacetic acid at room temperature furnished desired 2-aminoimidazoles 4 and 10 in good to moderate yields. (C) 2009 Elsevier Ltd. All rights reserved.
PROCESS FOR PREPARING N-(2-CHLORO-6-METHYLPHENYL)-2-[[6-[4-(2-HYDROXYETHYL)-1-PIPERAZINYL]-2-METHYL-4-PYRIMIDINYL]AMINO] -5-THIAZOLECARBOXAMIDE AND RELATED METABOLITES THEREOF
申请人:Sun Jung-Hui
公开号:US20070219370A1
公开(公告)日:2007-09-20
The present invention is directed to process for the preparation of metabolites as well as the parent compound of N-(2-chloro-6-methylphenyl)-2-[[6-[4-(2-hydroxyethyl)-1-piperazinyl]-2-methyl-4-pyrimidinyl] amino]-5-thiazolecarboxamide, the compound of formula (I).
Investigations on substituted (2-aminothiazol-5-yl)(imidazo[1,2-a]pyridin-3-yl)methanones for the treatment of Alzheimer’s disease
作者:Sneha R. Sagar、Devendra Pratap Singh、Rajesh D. Das、Nirupa B. Panchal、Vasudevan Sudarsanam、Manish Nivsarkar、Kamala K. Vasu
DOI:10.1016/j.bmc.2021.116091
日期:2021.4
A convenient synthesis of di- and trisubstituted 2-aminoimidazoles from 1-amidino-3-trityl-thioureas
作者:Jitendra C. Kaila、Arshi B. Baraiya、Amit N. Pandya、Hitesh B. Jalani、Kamala K. Vasu、V. Sudarsanam
DOI:10.1016/j.tetlet.2009.04.083
日期:2009.7
Convenient synthesis of 2-amino-1,5-disubstituted and 2-amino-1,4,5-trisubstituted imidazoles has been reported using readily available starting materials and simple reagents under mild conditions. Guanylation of 1-amidino-3-trityl-thioureas 1 and 7 using mercury(II) chloride (Caution) as a thiophile resulted in corresponding guanidines 2 and 8 which on reaction with alpha-bromo ketones yielded 2-tritylaminoimidazoles. Deprotection of 2-tritylaminoimidazoles using trifluoroacetic acid at room temperature furnished desired 2-aminoimidazoles 4 and 10 in good to moderate yields. (C) 2009 Elsevier Ltd. All rights reserved.