The effect of a trifluoromethyl group on the alkylation of pyridin-2-ones, using α-haloesters, α-haloamides, allyl halides and chloroacetonitrile, has been studied. In all cases, the corresponding 2-O-alkylated products were obtained exclusively, irrespective of the nature of alkylating agent. The study indicates that the trifluoromethyl group present at the 4 or 6 position of the pyridin-2-one ring
A novel synthetic route to 2-amino-3-cyano-4-trifluoromethyl-6-substituted pyridines
作者:B. Narsaiah、A. Sivaprasad、R.V. Venkataratnam
DOI:10.1016/0022-1139(93)02936-9
日期:1994.4
2-Amino-3-cyano-4-trifluoromethyl-6-substituted pyridines have been obtained from 3-cyano-4-trifluoromethyl-6-substituted-2(1H)pyridones via an interesting rearrangement of 2-O-acetamido-3-cyano-4-trifluoromethyl-6-sub-stituted pyridine intermediates.
Synthesis of novel 2,7-disubstituted-3-amino-9-trifluoromethyl-4-oxo-4H-pyrido-[3',2':4,5]-furo-[3,2-d]-(1,3)-pyrimidines
作者:B. Narsaiah、A. Sivaprasad、R.V. Venkataratnam
DOI:10.1016/0022-1139(94)03079-0
日期:1994.11
Synthesis of novel 2,7-disubstituted-3-amino-9-trifluoromethyl-4-oxo-4H-pyrido-[3',2':4,5]-furo-[3,2-d]-(1,3)-pyrimidines (5) from 3-cyano-4-trifluoromethyl-6-substituted 2(1H)-pyridones (1) via a series of new intermediates such as 2-O-ethylacetoxy-3-cyano-4-trifluoromethyl-6-substituted pyridines (2), 2-carbethoxy-3-amino-4-trifluoromethyl-6-substituted furo-[2,3-b]-pyridines (3) and 2-carbohydr
新型2,7-二取代-3-氨基-9-三氟甲基-4-氧代-4 H-吡啶基- [3',2':4,5 ]-呋喃基- [3,2- d ]-(1经由一系列新的中间体,例如2 - O-乙基乙酰氧基-3-氰基-4-的3-氰基-4-三氟甲基-6-取代的2(1 H)-吡啶酮(1)中的,3)-嘧啶(5)三氟甲基-6取代的吡啶(2),2-甲乙氧基-3-氨基-4-三氟甲基6取代的呋喃-[2,3- b ]-吡啶(3)和2-碳酰肼-3-氨基-4-已经描述了三氟甲基-6-取代的呋喃-[2,3- b ]-吡啶(4)。
Discovery and structure–activity relationships study of novel thieno[2,3-b]pyridine analogues as hepatitis C virus inhibitors
Current treatment for hepatitis C is barely satisfactory, there is an urgent need to develop novel agents for combating hepatitis C virus infection. This study discovered a new class of thieno[ 2,3-b] pyridine derivatives as HCV inhibitors. First, a hit compound characterized by a thienopyridine core was identified in a cell-based screening of our privileged small molecule library. And then, structure activity relationship study of the hit compound led to the discovery of several potent compounds without obvious cytotoxicity in vitro (12c, EC50 = 3.3 mu M, SI > 30.3, 12b, EC50 = 3.5 mu M, SI > 28.6, 10l, EC50 = 3.9 mu M, SI > 25.6, 12o, EC50 = 4.5 mu M, SI > 22.2, respectively). Although the mechanism of them had not been clearly elucidated, our preliminary optimization of this class of compounds had provided us a start point to develop new anti-HCV agents. (C) 2014 Elsevier Ltd. All rights reserved.