Catalyst-free synthesis of 2,3-dihydro-1,5-benzothiazepines in a renewable and biodegradable reaction medium
作者:Neetu Yadav、Vijay B. Yadav、Mohd Danish Ansari、Hozeyfa Sagir、Ankit Verma、I. R. Siddiqui
DOI:10.1039/c8nj05611k
日期:——
A clean and efficient strategy for the synthesis of benzothiazepines from chalcone and ortho-aminothiophenol has been reported.
一种从查尔酮和邻氨基硫酚合成苯噻吩的清洁高效策略已被报道。
A new approach to 4,6-disubstituted-3,4-dihydropyran-2-ones by Domino Michael addition-cyclization reaction under PTC conditions
作者:Nicoletta Gaggero、Domenico C.M. Albanese、Donatella Nava
DOI:10.1016/j.tet.2014.09.022
日期:2014.11
Domino Michael addition-cyclization reactions of α,β-unsaturatedcarbonylcompounds with activated 1,3-dithiane-2-carbothioate esters under solid-liquid phase transfer catalysis conditions provide 4,6-disubstituted-3,4-dihydropyran-2-one-3,3-dithioacetals in good chemical yield. Desulfurization proceeds chemoselectively under mild conditions affording 3,4-dihydropyran-2-ones in high yields.
The chemistry of α,β-ditosyloxyketones: new and convenient route for the synthesis of 1,4,5-trisubstituted pyrazoles from α,β-chalcone ditosylates
作者:Om Prakash、Deepak Sharma、Raj Kamal、Rajesh Kumar、Reshmi R. Nair
DOI:10.1016/j.tet.2009.10.001
日期:2009.12
reagents such as phenylhydrazine hydrochloride, semicarbazide hydrochloride and thiosemicarbazide in suitable conditions leads to 1,2-aryl shift, thereby providing a novel route for the synthesis of 1,4,5-trisubstitutedpyrazoles.
Amberlyst-15 catalyzed synthesis of novel thiophene–pyrazoline derivatives: spectral and crystallographic characterization and anti-inflammatory and antimicrobial evaluation
作者:Malledevarapura Gurumurthy Prabhudeva、Karthik Kumara、Achutha Dileep Kumar、Mylarappa B. Ningappa、Neratur K. Lokanath、Kariyappa Ajay Kumar
DOI:10.1007/s11164-018-3501-2
日期:2018.11
instances of antimicrobial drug resistance and Inflammation-mediated disorders requires the design and synthesis of new small-molecules with higher affinity and specificity for their potential targets to serve as antibiotics or anti-inflammatory drugs, respectively. The current study presents the synthesis of a series of chalcones, 3(a–h) by the reaction of 3-methylthiophene-2-carbaldehyde, 1 and acetophenones
Design and Amberlyst-15 mediated synthesis of novel thienyl-pyrazole carboxamides that potently inhibit Phospholipase A2 by binding to an allosteric site on the enzyme
Inflammation-mediated disorders are on the rise and hence, there is an urgent need for the design and synthesis of new anti-inflammatory drugs with higher affinity and specificity for their potential targets. The current study presents an effective and new protocol for the synthesis of thienyl-pyrazoles through 3 + 2 annulations using a recyclable heterogeneous catalyst Amberlyst-15. Chalcones 3(a-g)