Synthesis of bridgedhead azolo[3,2-a]pyrimidines and imidazo[2,1-b]thiazines through ring transformation of 2H-pyran-2-ones
摘要:
Suitably functionalized 3-carbomethoxy/cyano-2H-pyran-2-ones are excellent synthons for the synthesis of arenes and heteroarenes of therapeutic importance. The compounds 6-aryl-3-cyano-4-methylsulfanyl-2H-pyran-2-ones have been transformed into bridgedhead azolopyrimidines and imidazothiazines through thermal and base-induced ring transformation reactions with aminoazoles and imidazolidin-2-thiones, respectively. (C) 2003 Elsevier Ltd. All rights reserved.
Synthesis of thiophenes and thieno[3,2-c]pyran-4-ones as antileishmanial and antifungal agents
摘要:
A series of highly functionalized thiophene (2) and thieno[3,2-c]pyran-4-one(4) derivatives have been synthesized and evaluated for their antileishmanial and antifungal activities. (C) 1997 Elsevier Science Ltd.
An expeditious synthesis of imidazo[1,2-a]pyridines through nucleophile induced ring transformation reactions of 6-aryl-4-methylsulfanyl-2H-pyran-2-one-3-carbonitriles
作者:Vishnu Ji Ram、Nidhi Agarwal、Ashoke Sharon、Prakas R Maulik
DOI:10.1016/s0040-4039(01)02112-8
日期:2002.1
An efficient and convenient synthesis of 2-(5-aryl-8-nitro-2,3-dihydroimidazo[1,2-a]pyridin-7(1H)-ylidene)acetonitriles (3) and 6-aryl-4-2-[(E)-nitromethylidene]-1-imidazolidinyl}-2-oxo-2H-pyran-3-carbonitriles (4) through nucleophile induced ring transformation of suitably functionalized 2H-pyran-2-one (1) from imidazoliden-2-ylidene nitromethane is delineated.
有效和方便地合成2-(5-芳基-8-硝基-2,3-二氢咪唑并[1,2 - a ]吡啶-7(1 H)-亚烷基)乙腈(3)和6-芳基-4- 2-[(E)-硝基亚甲基] -1-咪唑啉基} -2-氧代-2 H-吡喃-3-甲腈(4)通过亲核试剂诱导的适当官能化的2 H-吡喃-2-酮的环转化(1)描绘了由咪唑啉-2-亚甲基硝基甲烷衍生的产物。
Synthesis of Quinolizines, Pyrano[4,3-b]quinolizines and Azaquinolizines Through Nucleophile Induced Ring Transformation Reactions