Aerobic oxidative esterification and thioesterification of aldehydes using dibromoisocyanuric acid under mild conditions: no metal catalysts required
作者:Young-Do Kwon、Minh Thanh La、Hee-Kwon Kim
DOI:10.1039/c8nj01085d
日期:——
thioesters were synthesized by oxidative esterification and thioesterification via in situ generated acyl bromide intermediates, which were used to react with various alcohols and thiols. The esterification and thioesterification were readily performed in the presence of dibromoisocyanuric acid in dichloromethane, without any metal catalysts and undermildconditions. By using this reaction protocol
Convenient metal-free direct oxidative amidation of aldehyde using dibromoisocyanuric acid under mild conditions
作者:Soosung Kang、Minh Thanh La、Hee-Kwon Kim
DOI:10.1016/j.tetlet.2018.08.026
日期:2018.9
synthesized by an oxidative amidation in the presence of dibromoisocyanuric acid (DBI). Treatment of aromatic and aliphatic aldehydes with dibromoisocyanuric acid generated acyl bromide intermediates, which were employed to react with a variety of secondary and primary amines to give amides. Through this reaction method, various amides were synthesized directly from aldehydes undermildconditions in high yields
describes the development of an extremely efficient process for the oxidative chlorination of a benzyl, alkyl thioether to yield an alkylsulfonyl chloride. This process was subsequently run on >100 kg scale. The product alkylsulfonyl chloride was required as an intermediate, being used by several drug projects, to prepare sulfonamides. Routine data collection and reaction profiling has led to understanding
[EN] METHOD OF ACYLATING AN AROMATIC COMPOUND<br/>[FR] PROCÉDÉ D'ACYLATION D'UN COMPOSÉ AROMATIQUE
申请人:DSM IP ASSETS BV
公开号:WO2015001032A1
公开(公告)日:2015-01-08
The present invention relates to a method of acylating a substituted aromatic compound. The substituted aromatic compound is reacted with an acylating agent in the presence of a macroreticular sulfonic acid ion exchange resin having a water-to-phenol shrinkage between 25 % and 40 %. The method is very advantageous in that the resin is deactivated much less than other resins without a fast drop in conversion and selectivity in the reaction.
PROCESS FOR PRODUCTION OF RIBOFURANOSE DERIVATIVES
申请人:API Corporation
公开号:EP2210896A1
公开(公告)日:2010-07-28
It is an object of the present Invention to provide a process for producing 1,2,3-tri-O-acetyl-5-deoxy-ribofuranose in an industrially appropriate manner. The present invention provides a process for producing a 1,2,3-tri-O-acetyl-5-deoxy-ribofuranose which comprises hydrogenating a compound represented by the formula (1) or formula (2) in the presence of a metal catalyst:
wherein P1 and P2 independently represent a hydrogen atom or an acyl group OP1 and OP2 may together form an acetal group, and R represents a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, or an acyl group;
wherein X1 represents Br or I, P3 and P4 independently represent a hydrogen atom or an acryl group, and R represents a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, or an acyl group.