Diastereoselective Fluorination of Silylated 1,2-Oxazines to Access Fluorinated N,O-Heterocycles
作者:Véronique Gouverneur、Yu-hong Lam、Matthew Hopkinson、Steven Stanway
DOI:10.1055/s-2007-992361
日期:2007.12
The electrophilic fluorination of silylated N,O-heterocycles, prepared from a nitroso-Diels-Alder reaction of silylated dienes, afforded fluorinated 1,2-oxazines with the fluorine substituent on a stereogenic centre in moderate to high diastereoselectivities. The sense and level of diastereocontrol were found to be dependent of the substitution pattern of the heterocycle.
通过对硅烷化二烯的亚硝基-Diels-Alder 反应制备的硅烷化 N,O-杂环进行亲电氟化,得到了氟取代基位于立体中心的氟化 1,2-噁嗪,非对映选择性从中等到较高。研究发现,非对映选择性的意义和水平取决于杂环的取代模式。