Stereoselective oxygenation of the homotropane ring systems; Synthesis of exo- and endo- 7-hydroxy- and 7,8-epoxyhomotropanes
作者:David E Justice、John R Malpass
DOI:10.1016/0040-4039(95)00835-z
日期:1995.6
Stereoselective introduction of an endo- epoxide into the 2-carbon bridge of the homotropane (9-azabicyclo[4.2.1]nonane) ring system has been achieved via a 4-aminocyclooct-2-enol derivative; the direct route to the exo- analogue from 7,8-dehydrohomotropanes is less efficient but the novel exo- and endo- expoxides show substantially different reactivity. Completely different tautomeric preferences
立体选择性引入的内切-环氧化物进homotropane(9-氮杂双环[4.2.1]壬烷)的环系统已经通过4 aminocyclooct -2-烯醇衍生物已取得的2 -碳桥; 从7,8-脱氢同型环烷到外泌类似物的直接途径效率不高,但是新型外泌和内暴露的反应性却大不相同。对于两种非对映异构的1-羟基-7,8-环氧高纯烷烃,观察到完全不同的互变异构偏好,出乎意料地提供了清洁有效合成外-环氧高纯烷烃衍生物的选择方法。