Cyclooct-1-en-5-yne. Preparation, spectroscopic characteristics and chemical reactivity
作者:Werner Leupin、Jakob Wirz
DOI:10.1002/hlca.19780610514
日期:1978.7.12
band in the photoelectron spectrum of 3 (Iv 9.10 eV) is attributed to ionization from a rather delocalized orbital with predominant weight of the double bond p-AO's. Nevertheless, the high reactivity of 3 stems from the strained triple bond as evidenced by the reaction products obtained by pyrolysis, oxidation, Diels-Alder addition, and 1, 3-dipolar addition (Scheme 4).
通过用四乙酸铅氧化环辛-5-烯-1,2-二hydr(方案2),获得了作为可分离的但高反应性的烃,环辛-1-烯-5-炔(3 )。关于结构和构象移动性信息3已经从其的分析获得了1 H-和13 C-NMR。光谱,发现与力场计算的结果一致。溶液中3的光解(206 nm)诱导裂解为丁三烯和丁二烯。在的光电子能谱第一带3(我v9.10 eV)归因于一个离域较远的轨道的电离,其主要具有双键p-AO的重量。然而,如通过热解,氧化,Diels-Alder加成和1,3-偶极加成所获得的反应产物所证明的,3的高反应性源自应变的三键。(方案4)。