New N-alkylsulfonamides and alkyl sulfonates derived from 6-C-sulfosugars
摘要:
Protected 6-C-sulfosugars have been transformed into alkyl sulfonates and N-alkylsulfonamides, including a pseudo-disaccharide with a 6 to 6'-sulfonamide linkage. The method involves the oxidation of 6-thioacetate sugar derivatives to 6-C-sulfosugars, and their transformation into sulfonyl chlorides using SO2O2 in anhydrous CH2O2 followed by in situ coupling with nucleophiles in the presence of an excess of base. Sulfonylation through phase-transfer conditions has proved to be suitable for the synthesis of the pseudo-disaccharide. (C) 2002 Elsevier Science Ltd. All rights reserved.
Abstract Methyl 2-amino-2-6-dideoxy-α- d -glucopyranoside-sulfonic acid (8) was prepared by oxidation of methyl 3,4-di-O-acetyl-6-S-acetyl-2-benzamido-2-deoxy-6-thio-α- d-glucopyranoside with hydrogen peroxide in acetic acid followed by N- and O-deacylation with aqueous sodium hydroxide. Compound 8 was also obtained by oxudation of methyl 3,4-di-O-acetyl-6-S-acetyl-2-deoxy-2[(2,2-dimethoxycarbonyl-vinyl)
New N-alkylsulfonamides and alkyl sulfonates derived from 6-C-sulfosugars
作者:Vı́ctor Ulgar、Inés Maya、José Fuentes、José G Fernández-Bolaños
DOI:10.1016/s0040-4020(02)00874-8
日期:2002.9
Protected 6-C-sulfosugars have been transformed into alkyl sulfonates and N-alkylsulfonamides, including a pseudo-disaccharide with a 6 to 6'-sulfonamide linkage. The method involves the oxidation of 6-thioacetate sugar derivatives to 6-C-sulfosugars, and their transformation into sulfonyl chlorides using SO2O2 in anhydrous CH2O2 followed by in situ coupling with nucleophiles in the presence of an excess of base. Sulfonylation through phase-transfer conditions has proved to be suitable for the synthesis of the pseudo-disaccharide. (C) 2002 Elsevier Science Ltd. All rights reserved.