Functionalized chloroenamines in aminocyclopropane synthesis III. synthesis and assignment of configuration of two isomeric morpholinobicyclo[3.1.0]hexane derivatives
作者:Elmar Vilsmaier、Rainer Adam、Claus Tetzlaff、Regina Cronauer
DOI:10.1016/s0040-4020(01)89230-9
日期:1989.1
generating tricyclic derivatives 14, 16 and 17. LiAlH4 reduction of 11 afforded aminoalcohol 12. The corresponding exo-morpholino isomer 20 could be obtained by LiAlH4 reduction of exo-morpholino compound 19 which was accessible from N-tosylcarbamoylated chloroenamine 10 and cyanide. ΔGX values of 75.4–77.6 kJ/mol and 52.1 kJ/mol were determined for the morpholine dynamics in the two isomeric compounds 12
酰化chloroenamine 7与氰化物的反应,得到内型吗啉代化合物11的11的内切吗啉代构造通过随后关环反应生成三环衍生物14,16和17的LiAlH建立4还原的11得到氨基醇12。相应exo-吗啉代异构体20可以通过LiAlH 4还原exo-吗啉代化合物19得到,其可从N-甲苯磺基氨基甲酰基化的氯亚胺10和氰化物得到。测定了两种异构体化合物12和20中的吗啉动力学值,ΔGX值分别为75.4-77.6 kJ / mol和52.1 kJ / mol。这表明11 H NMR光谱法测定吗啉的动力学,即使在有两个取代的吗啉代双环[n.1.0]烷烃衍生物的情况下,也可以确定构型。