Synthesis and antibacterial evaluation of ureides of Baylis–Hillman derivatives
摘要:
The synthesis of several 1-(2-cyano-3-aryl-allyl)-3-aryl-urea(thiourea) constructed from the reaction between allylamines generated from Baylis-Hillman acetates and substituted isocyanates and isothiocyanates has been described. Further, their cyclization in the presence of a base led to the formation of 5-arylmethyl-4-imino-3-aryl-3,4-dihydro-1H-pyrimidin-2-ones. All compounds were tested for their antibacterial activity. Few of the compounds showed superior activity or were equipotent to the standard antibacterial agents. (c) 2006 Elsevier Ltd. All rights reserved.
Nitrile biotransformations for the synthesis of enantiomerically enriched Baylis–Hillman adducts
作者:Mei-Xiang Wang、Yan Wu
DOI:10.1039/b209791e
日期:2003.1.30
Catalysed by the nitrile hydratase/amidase-containing Rhodococcus sp. AJ270 cells, a number of β-aryl- and β-alkyl- β-hydroxy-α-methylenepropiononitriles (the BaylisâHillman nitriles)
1 underwent hydrolysis under mild conditions to produce the corresponding enantiomerically enriched BaylisâHillman amides 2 and acids 3. The enantioselectivity of the biotransformations was strongly determined by the steric effect of the substituents at the β-position of the substrates. The protection of the free hydroxy of β-phenyl-β-hydroxy-α-methylenepropiononitrile 1a by methylation led to the enhancement of enantiocontrol of the biohydrolysis.
Substrate Evaluation of<i>Rhodococcus erythropolis</i>SET1, a Nitrile Hydrolysing Bacterium, Demonstrating Dual Activity Strongly Dependent on Nitrile Sub-Structure
作者:Tracey M. Coady、Lee V. Coffey、Catherine O'Reilly、Claire M. Lennon
DOI:10.1002/ejoc.201403201
日期:2015.2
Rhodococcus erythropolis SET1, a novel nitrilehydrolysing bacterial isolate, has been undertaken with 34 nitriles, 33 chiral and 1 prochiral. These substrates consist primarily of β-hydroxy nitriles with varying alkyl and aryl groups at the β position and containing in several compounds different substituents α to the nitrile. In the case of β-hydroxy nitriles without substitution at the α position
The synthesis of several 1-(2-cyano-3-aryl-allyl)-3-aryl-urea(thiourea) constructed from the reaction between allylamines generated from Baylis-Hillman acetates and substituted isocyanates and isothiocyanates has been described. Further, their cyclization in the presence of a base led to the formation of 5-arylmethyl-4-imino-3-aryl-3,4-dihydro-1H-pyrimidin-2-ones. All compounds were tested for their antibacterial activity. Few of the compounds showed superior activity or were equipotent to the standard antibacterial agents. (c) 2006 Elsevier Ltd. All rights reserved.