Acyl chlorides are prepared by reacting a carboxylic acid or its anhydride with carbonyl chloride in the presence of a carboxamide of the formula I ##STR1## where R.sup.1 is a radical of the formula ##STR2## R. sup.2 and R.sup.3 are each alkyl of 1 to 9 carbon atoms, R.sup...
Acyl chlorides are prepared by reacting a carboxylic acid or its anhydride with carbonyl chloride in the presence of a carboxamide of the formula I ##STR1## where R.sup.1 is a radical of the formula ##STR2## R. sup.2 and R.sup.3 are each alkyl of 1 to 9 carbon atoms, R.sup...
(wherein M is a cation)) comprising the step of reacting a substituted phenol corresponding to L with either (1) a carboxylic acid corresponding to RCO- in the presence of a chlorinating agent or (2) an acyl chloride corresponding to RCO- in the presence of a tertiary amine or tertiary...
Abstract A facile acid catalysed cyclisation method for the preparation of the cyclic urea 2 H ‐imidazo[4,5‐ c ]pyridin‐2‐one (2) in > 95 % yield is ... F Janssens,AGMD Knaep,TFJ Nelen 被引量: 0发表: 1991年 Practical Considerations for the Formation of Acyl Imidazolides from Ca...
A versatile, highly efficient process for the preparation of acylphosphines such as mono- and bisacylphosphines via reaction of phosphines (PH3 and higher homologues) or silylated phosphines with acylhalides in the presence of at least one lewis acid. Further a novel acyl phosphines obtainable...
Polymers containing at least 85% by weight of acrylonitrile are prepared by polymerizing the monomer in the presence of 0,05 to 20% by weight, based on the monomers, of hydrogen peroxide, an alkyl or acyl hydroperoxide, an alkyl, aryl, acyl or triacetone peroxide, or an alkali metal perbo...
of formula (V), (b) cleaving the 7-amido gp. on (V) to give 7-amino-3-(5-(1,2,3-triazol-5-yl)thiomethyl)-3-cephem-4-carboxyli- c acid (VI) and (c) opt. acylating (VI) with a deriv. of D-(-) acid (VII) (where B is protecting gp) and eliminating the protecting ...
PREPARATION OF P-ETHOXYCARBONYLPHENYL EPSILON-GUAN 优质文献 相似文献Reactions of Potassium Iron Carbonylate with Olefins and Alkyl Halides This is in striking contrast to the case of acylcobalt carbonyl. Styrene yielded two isomeric aldehydes, α- and β-phenylpropionaldehydes. Ethyl caproate and enant...
The invention relates 6-acyl-(6H)-dibenz[c,e][1,2]oxaphosphorine-6-oxides of the formula ##STR1## wherein each of R, Rand Rmay be present one or more times and R, Rand Rrepresent halogen having an atomic number of from 9 to 35, alkyl or alkoxy each having from 1 to 6 carbo...
The present invention relates to a microcapsule preparation product of alginate-chitosan acyl derivatives, which is produced by mixing microcapsules of alg... X Ma,W Yu,H Xie,... - Walter de Gruyter GmbH & Co. KG 被引量: 9发表: 2013年 Preparation and characterization of galactosylated algina...