Rapid preparation of (methyl)malonyl coenzyme A and enzymatic formation of unusual polyketides by type III polyketide synthase from Aquilaria sinensis
摘要:
(Methyl) malonyl coenzyme A was rapidly and effectively synthesized by a two-step procedure involving preparation of N-hydroxysuccinimidyl (methyl) malonate from (methyl) Meldrum's acid, and followed by transesterification with coenzyme A. The synthesized (methyl) malonyl coenzyme A could be well accepted and assembled to 4-hydroxy phenylpropionyl coenzyme A by type III polyketide synthase from Aquilaria sinensis to produce dihydrochalcone and 4-hydroxy-3,5-dimethyl-6-(4-hydroxyphenethyl)-2H-pyrone as well as 4-hydroxy-3,5-dimethyl-6-(5-(4-hydroxyphenyl)-3-oxopentan-2-yl)-2H-pyrone. (C) 2015 Elsevier Ltd. All rights reserved.
Self-condensation of activated malonic acid half esters: a model for the decarboxylative Claisen condensation in polyketide biosynthesis
作者:Youngha Ryu、A.Ian Scott
DOI:10.1016/j.tetlet.2003.08.014
日期:2003.9
The reaction of a malonicacid half oxyester with a N-hydroxysuccinimidyl ester-forming reagent resulted in self-condensation to provide the corresponding 1,3-acetonedicarboxylic acid diester. This new method does not require a divalent metal chelator or a coordinating solvent for successful condensation.
SILOXANE LIGANDS TO BE USED FOR DISPERSING QUANTUM DOTS IN SILICONE HOSTS TO OBTAIN COLOR CONVERTERS FOR LED LIGHTING
申请人:KONINKLIJKE PHILIPS N.V.
公开号:US20170222097A1
公开(公告)日:2017-08-03
The invention provides a luminescent material comprising wavelength converter nanoparticles (
120
) with siloxane polymer capping ligands (
130
) associated to the wavelength converter nanoparticles (
120
), wherein the siloxane polymer capping ligands (
130
) comprise siloxane polymers which comprise at least one capping group comprising a terminal carboxylic acid group, wherein the capping group comprises in total at least six carbon atoms.
Rapid preparation of (methyl)malonyl coenzyme A and enzymatic formation of unusual polyketides by type III polyketide synthase from Aquilaria sinensis
作者:Bo-Wen Gao、Xiao-Hui Wang、Xiao Liu、She-Po Shi、Peng-Fei Tu
DOI:10.1016/j.bmcl.2015.01.045
日期:2015.3
(Methyl) malonyl coenzyme A was rapidly and effectively synthesized by a two-step procedure involving preparation of N-hydroxysuccinimidyl (methyl) malonate from (methyl) Meldrum's acid, and followed by transesterification with coenzyme A. The synthesized (methyl) malonyl coenzyme A could be well accepted and assembled to 4-hydroxy phenylpropionyl coenzyme A by type III polyketide synthase from Aquilaria sinensis to produce dihydrochalcone and 4-hydroxy-3,5-dimethyl-6-(4-hydroxyphenethyl)-2H-pyrone as well as 4-hydroxy-3,5-dimethyl-6-(5-(4-hydroxyphenyl)-3-oxopentan-2-yl)-2H-pyrone. (C) 2015 Elsevier Ltd. All rights reserved.