Synthesis and fluorine NMR chemical shifts for a series of exo-3,3-difluorotricyclo[3.2.1.02,4]octyl derivatives
作者:Merle A. Battiste、Robert G. Posey
DOI:10.1016/s0022-1139(99)00290-0
日期:2000.3
s 1 to a series of five-membered ring dienes stereoselectively provided the corresponding exo-2,4-dihalo-3,3-difluorotricyclo[3.2.1.02,4]oct-6-ene adducts. Removal of the C2, C4 halogens(bromine or chlorine) before or after saturation of the C6, C7 double bond afforded a variety of gem-difluorocyclopropyl derivatives in the analogous tricyclic manifold. The 19F and 1H NMR chemical shifts and coupling
1,2-二卤代3,3-二氟环丙烯1的Diels-Alder环加成反应到一系列五元环二烯的立体选择性提供了相应的exo-2,4-dihalo-3,3-二氟三环[3.2.1.0 2, 4 ] oct-6-烯加合物。在饱和的C6,C7双键之前或之后除去C2,C4的卤素(溴或氯),在类似的三环歧管中提供了各种宝石-二氟环丙基衍生物。列出了这些三环系统各自的19 F和1 H NMR化学位移及耦合常数。