作者:James W. Wilt、Mehboob Peeran、Subramanian Ramakrishnan、David S. Crumrine
DOI:10.1002/mrc.1260270405
日期:1989.4
and endo‐3,3‐diphenyltricyclo[3.2.1.02,4]octanes are reported. Comparisons with the parent exo‐ and endo‐tricyclo[3.2.1.02,4]octanes and with bicyclo[2.2.1]heptanes show that most of the chemical shifts are additive. Substituent effect constants are presented for the tricyclo[3.2.1.02,4]octyl system. Pronounced deshielding effects are seen in the endo series for C‐6 and −7 of the alkene endo‐3,3‐diphenyltricyclo[3
报道了一系列外型和内型 3,3-二苯基三环 [3.2.1.02,4] 辛烷的 13C NMR 化学位移。与母体外型和内型三环 [3.2.1.02,4] 辛烷以及双环 [2.2.1] 庚烷的比较表明,大多数化学位移是加性的。为三环[3.2.1.02,4]辛基体系提供了取代基效应常数。在烯烃内-3,3-二苯基三环[3.2.1.02,4]oct-6-烯、环氧化物内-3,3-二苯基三环[3.2]的C-6和-7的内系列中可以看到明显的去屏蔽效应.1.02,4]octan-6,7-exo-oxide 和四环 exo-3,3-diphenyltetracyclo[3.3.1.02,406,8]nonane。C-3 和 -8 的化学位移可用于诊断内取代与外取代。