Four types ofO-methylated substrates were designed as probes for the detection of fingerprints of Type IV P450s.
设计了四种O-甲基化底物作为探针,用于检测IV型P450的指纹。
Trimethylsilyldiazomethane ? A Mild and Efficient Reagent for the Methylation of Carboxylic Acids and Alcohols in Natural Products
作者:Armin Presser、Antje H�fner
DOI:10.1007/s00706-004-0188-4
日期:2004.8
Esterification of various naturally occurring carboxylic acids with trimethylsilyldiazomethane proceeds nearly quantitatively under very mild conditions. Furthermore, highly sterically hindered alcohols can be converted directly to the corresponding methyl ethers. Improved methods for the preparation and quantification of this reagent are described.
Selective cleavage of ethers by sodium iodide-acyl chloride
作者:Akira Oku、Toshiro Harada、Kazuhiro Kita
DOI:10.1016/s0040-4039(00)86921-x
日期:1982.1
Cyclic and acyclic ethers are regioselectively cleaved at less substituted α-carbon-oxygen bond in the absence of Lewis acid by the reagent system of sodium iodide and acylchlorides.
immobilized on silica as catalysts, at 60 °C, being the α-terpinyl methyl ether the main product. Tungstophosphoric acid (PW), molybdophosphoric acid (PMo), tungstosilicic acid (SiW) and molybdosilicic acid (SiMo) were immobilized on silica by sol–gel method. It was observed that the catalytic activity of the silica-supported heteropolyacids decreases in the series: PW2_S > SiW_S > PMo_S > SiMo_S. A
A dishwasher detergent composition comprising a starch-encapsulated fragrance composition, wherein the starch-encapsulated fragrance composition comprises one or more particles of starch-encapsulated fragrance composition.