A New Approach to Neuraminic Acid Analogues via 1,2-Oxazines
作者:Bettina Bressel、Hans-Ulrich Reissig
DOI:10.1021/ol802514m
日期:2009.2.5
A new stereoselective and potentially very flexible (C5 + C3 + C1) approach to neuraminicacid derivatives and analogues has been established using enantiopure nitrones and alkoxyallenes as C3 and C1 building blocks. Substituent OR2 in position 4 of neuraminicacidanalogues is defined by the alkoxyallene employed for the synthesis of the intermediate 1,2-oxazine. Side chain R1 can be varied by using
已经建立了一种新的立体选择性且可能非常灵活的(C 5 + C 3 + C 1)方法用于神经氨酸衍生物和类似物,其使用对映体纯的硝酮和烷氧基丙二烯作为C 3和C 1的结构单元。神经氨酸类似物的4位上的取代基OR 2由用于合成中间体1,2-恶嗪的烷氧基丙二烯定义。侧链R 1可以通过使用不同的前体硝酮来变化,并且也可以在氨基官能团处引入不同的保护基R 3。