作者:Paul Gesche、Fran�ois Klinger、Andreas Riesen、Th�ophile Tschamber、Margareta Zehnder、Jacques Streith
DOI:10.1002/hlca.19870700814
日期:1987.12.16
Saponification of homodiazepine 1a and 1b, in the absence of any proton donors, led to the formation of the 6π electron anionic species A which, by virtue of a 1,5-electrocyclization, is in equilibrium with the allylic anion B. This latter tricyclic species is thermodynamically less favoured than its bicyclic isomer A. Nevertheless, B could be trapped by acylation and led tupe-2 compounds which are
在没有任何质子供体的情况下对高氮二氮杂1 1a和1b进行皂化,导致形成6π电子阴离子物种A,该物种通过1,5-电环化与烯丙基阴离子B处于平衡状态。后者的三环物质在热力学上不如其双环异构体A受到青睐。然而,B可能会被酰化和带头的tupe- 2化合物捕获,这是主要的反应产物。这是由于B与A相比更具亲核性,因此具有更高的反应性。三环产物的穿线形拓扑2通过证实1 H-NMR和通过的X射线图2d中。所述transoid的几何2是一个torquospecific 1,5- electrocyclization(的的结果甲),这是由于位阻,甚至可能对电子因素。