Blanco, Jose L. Jimenez; Rubio, Enrique M.; Mellet, Carmen Ortiz, Synlett, 2004, # 12, p. 2230 - 2232
作者:Blanco, Jose L. Jimenez、Rubio, Enrique M.、Mellet, Carmen Ortiz、Fernandez, Jose M. Garcia
DOI:——
日期:——
Isothiocyanato derivatives of sugars in the stereoselective synthesis of spironucleosides and spiro-C-glycosides
作者:Consolación Gasch、M.Angeles Pradera、Bader A.B. Salameh、José L. Molina、José Fuentes
DOI:10.1016/s0957-4166(01)00223-3
日期:2001.6
A stereocontrolled synthesis of pyranoid and furanoid spironucleosides and spiro-C-glycosides (D-ribo and D-arabino configurations) of oxazolidines, oxazolines and perhydrooxazines via isothiocyanato sugar derivatives is reported. The intermediate isothiocyanates are prepared from sugar spiroketals by stereoselective opening of the acetal ring with trimethylsilyl N- and C-nucleophiles, and later formation of the isothiocyanato group. (C) 2001 Elsevier Science Ltd. All rights reserved.
Synthesis of α- and β-Glycosyl Isothiocyanates via Oxazoline Intermediates
作者:José L. Jiménez Blanco、Balla Sylla、Carmen Ortiz Mellet、José M. García Fernández
DOI:10.1021/jo062419z
日期:2007.6.1
A practical synthesis of acylated glycosyl isothiocyanates from sugar oxazolines, by reaction with thiophosgene, is reported. In the absence of any additive, the reaction is governed by the reverse anomeric effect, leading to the equatorially oriented isothiocyanate. However, in the presence of copper(II) chloride, the reaction proceeds preferentially with retention of the configuration at the anomeric