Preparation of sucrose heptaesters unsubstituted at the C-1 hydroxy group of the fructose moiety via selective O-desilylation
摘要:
Selective O-desilylation of 6,1',6-tri-O-tert-butyldiphenylsilyl-2,3,4,3',4'-penta-O-benzoylsucrose with hydrofluoric acid in acetonitrile led to the 1'-O-tert-butyldiphenylsilyl derivative (96% yield), which was further perbenzoylated and deprotected at OH-1' with tetrabutylammonium fluoride (86%). An analogous sequence with the corresponding O-acetylated sucrose derivative and tetrabutylammonium fluoride as desilylating agent resulted in a lower yield of the C-1' hydroxy derivative. (C) 2000 Elsevier Science Ltd. All rights reserved.
Preparation of sucrose heptaesters unsubstituted at the C-1 hydroxy group of the fructose moiety via selective O-desilylation
摘要:
Selective O-desilylation of 6,1',6-tri-O-tert-butyldiphenylsilyl-2,3,4,3',4'-penta-O-benzoylsucrose with hydrofluoric acid in acetonitrile led to the 1'-O-tert-butyldiphenylsilyl derivative (96% yield), which was further perbenzoylated and deprotected at OH-1' with tetrabutylammonium fluoride (86%). An analogous sequence with the corresponding O-acetylated sucrose derivative and tetrabutylammonium fluoride as desilylating agent resulted in a lower yield of the C-1' hydroxy derivative. (C) 2000 Elsevier Science Ltd. All rights reserved.
The first chemical synthesis of 1'-deoxy-1'-fluorosucrose has been accomplished in eight steps from sucrose by an unlikely, but ultimately successful, S(N)2 displacement reaction.
Preparation of sucrose heptaesters unsubstituted at the C-1 hydroxy group of the fructose moiety via selective O-desilylation
作者:M.Teresa Barros、Christopher D. Maycock、Christine Thomassigny
DOI:10.1016/s0008-6215(00)00119-1
日期:2000.9
Selective O-desilylation of 6,1',6-tri-O-tert-butyldiphenylsilyl-2,3,4,3',4'-penta-O-benzoylsucrose with hydrofluoric acid in acetonitrile led to the 1'-O-tert-butyldiphenylsilyl derivative (96% yield), which was further perbenzoylated and deprotected at OH-1' with tetrabutylammonium fluoride (86%). An analogous sequence with the corresponding O-acetylated sucrose derivative and tetrabutylammonium fluoride as desilylating agent resulted in a lower yield of the C-1' hydroxy derivative. (C) 2000 Elsevier Science Ltd. All rights reserved.