Microwave-assisted synthesis and antimicrobial evaluation of novel pyrazolines
摘要:
A series of 6-(5-aryl-4,5-dihydro-1H-pyrazol-3-yl)-2,2-dimethylchroman-7-ol and 6-(5-aryl-4,5-dihydro-1H-pyrazol-3-yl)-2,2-dimethyl-chroman-5-ol derivatives have been synthesized from the corresponding chalcones and hydrazine hydrate in the presence of sodium acetate under microwave irradiation involving the Michael addition followed by cycloaddition. All the newly synthesized 18 compounds were screened for their in vitro antimicrobial activity. Most of the compounds displayed very good to excellent antimicrobial activity in comparison to standard drugs streptomycin and nystatin.
BF3–Et2O mediated biogenetic type synthesis of chromanochalcones from prenylated chalcones via a regioselective cyclization reaction
摘要:
In continuation of out-program on synthetic chalcones. we have developed a simple and convenient method for the synthesis of chromanochalcones from prenylated chalcones in high yields by regioselective cyclization using BF3-Et2O. (C) 2007 Elsevier Ltd. All rights reserved.
A series of 6-(5-aryl-4,5-dihydro-1H-pyrazol-3-yl)-2,2-dimethylchroman-7-ol and 6-(5-aryl-4,5-dihydro-1H-pyrazol-3-yl)-2,2-dimethyl-chroman-5-ol derivatives have been synthesized from the corresponding chalcones and hydrazine hydrate in the presence of sodium acetate under microwave irradiation involving the Michael addition followed by cycloaddition. All the newly synthesized 18 compounds were screened for their in vitro antimicrobial activity. Most of the compounds displayed very good to excellent antimicrobial activity in comparison to standard drugs streptomycin and nystatin.
BF3–Et2O mediated biogenetic type synthesis of chromanochalcones from prenylated chalcones via a regioselective cyclization reaction
作者:T. Narender、K. Papi Reddy
DOI:10.1016/j.tetlet.2007.08.124
日期:2007.10
In continuation of out-program on synthetic chalcones. we have developed a simple and convenient method for the synthesis of chromanochalcones from prenylated chalcones in high yields by regioselective cyclization using BF3-Et2O. (C) 2007 Elsevier Ltd. All rights reserved.