954143-62-5Relevant articles and documents
IMPROVED SYNTHESIS OF CAPURAMYCIN AND ITS ANALOGUES
-
, (2015/03/13)
Provided herein are compounds of Formula I, Formula II, and Formula X, which are useful for the treatment of infectious diseases. Also provided herein are processes for preparing 1-[5-0-[4,6-Dideoxy-6-oxo-6-[[[(3S)-hexahydro-2-oxo-1H-azepine]-3-y1]amino]-Pβ-L-erythro-4- hexenopyranosyl]-3-0-methyl 6-deoxy-6-amino-α-L-talofuranuronosyl]-1,2,3,4-tetrahydro-2,4- dioxopyrimidine (capuramycin), analogues thereof, and intermediates useful therefore. Also provided herein are III, IIIa, and IX, which are useful in the process for preparing capuramycin and/or a certain compound of Formula I.
(2,6-Dichloro-4-alkoxyphenyl)-(2,4-dichlorophenyl)methyl trichloroacetimidates: Protection of alcohols and carboxylic acids in solution or on polymer support
Kurosu, Michio,Li, Kai
experimental part, p. 3633 - 3641 (2010/03/05)
(2,6-Dichloro-4-methoxyphenyl)-(2,4-dichlorophenyl)-methyl trichloroacetimidate can be efficiently activated by TMSOTf (10-100 mol%) to react with alcohols and carboxylic acids. Under these conditions a wide variety of alcohols can be transformed into the corresponding ethers in excellent yields with a slight excess of the trichloroacetimidate. The resulting ethers are not susceptible to typical deprotection conditions for benzyl and 4-methoxybenzyl ether groups, however, they can be conveniently deprotected by treatment with 30-50% trifluoroacetic acid in dichloromethane. Polymer-bound (2,6-dichloro-4-alkoxyphenyl)-(2,4-dichlorophenyl)methyl trichloroacetimidate is useful for immobilization of alcohols and carboxylic acids.
Acid- and base-stable esters: A new protecting group for carboxylic acids
Kurosu, Michio,Biswas, Kallolmay,Narayanasamy, Prabagaran,Crick, Dean C.
, p. 2513 - 2516 (2008/02/13)
An acid- and base-stable protecting group for carboxylic acids is described. The esters of (2,6-dichloro-4-methoxyphenyl)(2,4-dichlorophenyl) methanol are stable to Bransted and Lewis acids, Bronsted bases, and a wide variety of nucleophiles; however, the esters can be conveniently deprotected by a solvolytic displacement reaction with 20% trifluoroacetic acid. Georg Thieme Verlag Stuttgart.