156006-08-5Relevant articles and documents
A fluorescence-based assay for Baeyer-Villiger monooxygenases, hydroxylases and lactonases
Sicard, Renaud,Chen, Lu S.,Marsaioli, Anita J.,Reymond, Jean-Louis
, p. 1041 - 1050 (2007/10/03)
Alkylation of umbelliferone and nitrophenol with chloroacetone, 3-chlorobutanone, 2-chlorocyclopentanone and 2-chlorocyclohexanone gave the corresponding 2-coumaryloxy and 2-nitrophenoxy ketones. The 2-coumaryloxy ketones were used as fluorogenic substrates to detect Baeyer-Villiger monooxygenases activities of microbial cultures in highthroughput using microtiter plates. The 2-coumaryloxy ketones were oxidized by microorganisms producing Baeyer-Villiger monooxygenases (BVMO), releasing umbelliferone as a fluorescent signal. The substrates were also biotransformed by a microbial monooxygenase (Trichosporon cutaneum). Chemical Baeyer-Villiger oxidation of 2-coumaryloxy ketones using meta-chloroperbenzoic acid proceeded regioselectively to the corresponding acyloxyalkyl derivatives of umbelliferone and nitrophenol. These chiral lactones underwent a fluorogenic and chromogenic reaction upon hydrolysis by esterases, in particular pig liver esterase. Enantioselectivity of the ester hydrolysis reaction was determined by chiral-phase analysis of the unreacted lactones.
Synthesis and characterization of new methylpsoralens as potential photochemotherapeutic agents
Antonello,Zagotto,Mobilio,Marzano,Gia,Uriarte
, p. 277 - 280 (2007/10/02)
Three new psoralens with methyl groups on carbons involved in their reactive double bonds (compounds 9-11 in Scheme 1) were synthesized from the corresponding 7-hydroxycoumarins by cyclization of acetonyl derivatives of the latter in an alkaline medium. In preliminary tests, the new methyl-substituted psoralens exhibited considerable interaction in the dark with DNA, good photoreactivity against the macromolecule, and also interesting antiproliferative activity.