Salts of (R)-7-[3-amino-4-(2,4,5-trifluorophenyl)butanoyl]-3-trifluoromethyl-5,6,7,8-tetrahydroimidazo[1,5-a] pyrazine-1-carboxylic acid, preparation method and medical use thereof
Scalable Synthesis of Trifluoromethylated Imidazo-Fused N-Heterocycles Using TFAA and Trifluoroacetamide as CF<sub>3</sub>-Reagents
作者:Gabriel Schäfer、Muhamed Ahmetovic、Stefan Abele
DOI:10.1021/acs.orglett.7b03291
日期:2017.12.15
A scalable synthesis of trifluoromethylated imidazo-fused N-heterocyles from heterocyclic benzylamines using TFAA as trifluoromethylatingreagent is presented. The reaction proceeds via intermediate benzylic N-trifluoroacetamides followed by dehydrative cyclization to the products. To further broaden the scope and practicality, a new method for the preparation of benzylic N-trifluoroacetamides via
Tetrahydro-imidazo[1,5-α]pyrazine derivatives, preparation process and medicinal use thereof
申请人:Jiangsu Hengrui Medicine Co. Ltd.
公开号:US08207161B2
公开(公告)日:2012-06-26
Tetrahydro-imidazo[1,5-a]pyrazine derivatives of formula (I), their preparation methods, pharmaceutical compositions containing the derivatives and uses thereof as medicaments, especially as dipeptidyl peptidase IV inhibitors, wherein the substituents of formula (I) are defined as same as the description.
TETRAHYDRO-IMIDAZO[1,5-alpha] PYRAZINE DERIVATIVES, PREPERATION PROCESS AND MEDICINAL USE THEREOF
申请人:Tang Peng Cho
公开号:US20120220766A1
公开(公告)日:2012-08-30
Tetrahydro-imidazo[1,5-a]pyrazine derivatives of formula (I), their preparation methods, pharmaceutical compositions containing the derivatives and uses thereof as medicaments, especially as dipeptidyl peptidase IV inhibitors, wherein the substituents of formula (I) are defined as same as the description.
TETRAHYDRO-IMIDAZ0[1,5-A]PYRAZINE DERIVATIVES, PREPARATION PROCESS AND MEDICINAL USE THEREOF
申请人:Tang Peng Cho
公开号:US20100273786A1
公开(公告)日:2010-10-28
Tetrahydro-imidazo[1,5-a]pyrazine derivatives of formula (I), their preparation methods, pharmaceutical compositions containing the derivatives and uses thereof as medicaments, especially as dipeptidyl peptidase IV inhibitors, wherein the substituents of formula (I) are defined as same as the description.
Tetrahydro-imidazo[1,5-α] pyrazine derivatives, preparation process and medicinal use thereof
申请人:Tang Peng Cho
公开号:US08513411B2
公开(公告)日:2013-08-20
Tetrahydro-imidazo[1,5-a]pyrazine derivatives of formula (I), their preparation methods, pharmaceutical compositions containing the derivatives and uses thereof as medicaments, especially as dipeptidyl peptidase IV inhibitors, wherein the substituents of formula (I) are defined as same as the description.