Selective synthesis of fluorinated carbohydrates using N , N -diethyl-α,α-difluoro-( m -methylbenzyl)amine
摘要:
Deoxyfluorination of a hydroxy group in carbohydrates was carried out using N,N-diethyl-alpha,alpha-difluoro-(m-methylbenzyl)amine. A primary hydroxy group in carbohydrates was effectively converted to the corresponding fluoride under microwave irradiation or at 100degreesC. Deoxyfluorination of hydroxy groups at the anomeric position proceeded at below room temperature, and glycosyl fluorides Could be obtained in good yields. The reaction chemoselectively proceeded, and various protecting groups of carbohydrates can survive under the reaction conditions. (C) 2003 Elsevier Ltd. All rights reserved.
GLYCOSYLTRANSFERASE REVERSIBILITY FOR SUGAR NUCLEOTIDE SYNTHESIS AND MICROSCALE SCANNING
申请人:Thorson Jon S.
公开号:US20130004979A1
公开(公告)日:2013-01-03
The present invention generally relates to materials and methods for exploiting glycosyltransferase reversibility for nucleotide diphosphate (NDP) sugar synthesis. The present invention provides engineered glycosyltransferase enzymes characterized by improved reaction reversibility and expanded sugar donor specificity as compared to corresponding non-mutated glycosyltransferase enzymes. Such reagents provide advantageous routes to NDP sugars for subsequent use in a variety of biomedical applications, including enzymatic and chemo-enzymatic glycorandomization.
Deoxyfluorination of alcohols was carried out using N,N-diethyl-alpha,alpha-difluoro-(m-methylbenzyl)amine (DFMBA). Primary alcohols were effectively converted to fluorides under microwave irradiation or conventional heating. Deoxyfluorination of an anomeric hydroxy group in sugars by DFMBA proceeded at below room temperature and glycosyl fluorides could be obtained in good yields. The deoxyfluorination reaction chemoselectively proceeded and various protecting groups on the sugar can survive under the reaction conditions. (C) 2004 Elsevier Ltd. All rights reserved.
Fluorinated carbohydrates
作者:E.M. Bessell、A.B. Foster、J.H. Westwood、L.D. Hall、R.N. Johnson
DOI:10.1016/s0008-6215(00)80310-9
日期:1971.8
Helferich; Gnuechtel, Chemische Berichte, 1941, vol. 74, p. 1035,1037