The chemoenzymatic synthesis of 9-substituted 3,9-dideoxy-d-glycero-d-galacto-2-nonulosonic acids
作者:David C.M. Kong、Mark von Itzstein
DOI:10.1016/s0008-6215(97)10014-3
日期:1997.12
A series of C-6 functionalised mannosides has been synthesised. Subsequent exposure of 6-azido-6-deoxy-D-mannopyranose and 6-bromo-6-deoxy-D-mannopyranose to Neu5Ac aldolase and sodium pyruvate provided the corresponding 9-azido- and 9-bromo-3,9-dideoxy-D-glycero-D-galacto-2-nonulosonic acid, respectively. (C) 1998 Elsevier Science Ltd.
A Novel Protocol for the Regioselective Bromination of Primary Alcohols in Unprotected Carbohydrates or Glycosides
作者:Weihua Xue、Lifen Zhang
DOI:10.1002/cjoc.201200211
日期:2012.7
The regioselective and efficient bromination of primary hydroxyl groups in unprotectedcarbohydrates or glycosides is successfully achieved by using (chloro‐phenylthio‐methylene)dimethylammoniumchloride (CPMA) in the presence of tetrabutylammonium bromide (TBAB) in dry DMF.