The use of hydroxylamine derivatives as the aminoxy equivalent nucleophiles in Ferrier glycosylation catalyzed by various acid catalysts is described. The reaction of tri-O-protected d-glucal with N-hydroxyphthalimide or N-hydroxysuccinimide was effectively promoted by a catalytic amount of zinc(II) chloride to produce the corresponding aminoxy pseudoglycal in good yields and preferential anomeric selectivity.
本文描述了氢氧胺衍
生物作为
氨氧等效亲核试剂在各种酸催化剂催化下进行Ferrier糖苷化的应用。三-O-保护d-
葡萄糖醛与N-羟基邻苯二甲
酰亚胺或N-羟基琥珀
酰亚胺的反应,通过催化剂量的
氯化锌(II)有效促进,获得了相应的
氨氧伪糖醛,产率良好且具优先的异构选择性。