Practical Synthesis of a Vanilloid Receptor-1 Antagonist
作者:Oliver R. Thiel、Charles Bernard、Tony King、Mina Dilmeghani-Seran、Tracy Bostick、Robert D. Larsen、Margaret M. Faul
DOI:10.1021/jo8002216
日期:2008.5.1
Small molecule TRPV1 antagonists have been a recent focus in the search for pain treatment agents. We herein describe a practical and scalable synthesis of AMG 628 (1), a bis-substituted pyrimidine derivative that was identified as a highly efficacious agent, suitable for clinical development. Highlights of our approach include a practical route to a substituted benzothiazole, a scalable synthesis of an enantiopure piperazine fragment, and identification of conditions for selective coupling reactions on 2,6-dichloropyrimidine, to access the active pharmaceutical ingredient in high purity and overall yield.
3-Thio-5-(N-aryl-N′-arylguanyl)-1,2,4-dithiazoles as potential anti-convulsant and analgesic agents
作者:K Srivastava、SN Pandeya
DOI:10.1016/0223-5234(93)90010-c
日期:1993.1
The synthesis and biological activities of a number of substituted 3-thio-5-(N-aryl-N'-arylguanyl)-1,2,4-dithiazoles are reported. The aromatic substitutents m-CH3 3, p-CH3 4 and p-bromo 11 produced compounds with potent anti-convulsant properties in rats and compared favorably with the standard anti-convulsant drugs phenytoin and phenobarbitone-sodium in a number of test situations. In the analgesic test, most of the compounds exhibited analgesic activity with particular reference to p-CH3 4 substitution being most potent in the series.