2-benzopyrylium salts. xxxi
作者:Alexandru T. Balaban、Mircea D. Gheorghiu、Irina V. Shcherbakova、Evgenii V. Kuznetsov、Iosif A. Yudilevich
DOI:10.1016/s0040-4020(01)89971-3
日期:1987.1
Nucleophilic addition of a cyanide anion to 2-benzopyrylium salts I takes place at the first position and leads to stable isochromenes II, which are oxygen analogs of Reissert compounds. The structure II was confirmed by IR, 1H-NMR and 13C-NMR spectra. The latter spectra reveal clearly the cyano group (which does not yield any observable stretching band) and give evidence for diastereotopic isopropyl
在第一个位置上将氰化物阴离子亲核加成到2-苯并吡啶鎓盐I上,并生成稳定的异色酮II,这是Reissert化合物的氧类似物。通过IR,1 H-NMR和13 C-NMR光谱确认结构II 。后者的光谱清楚地揭示了氰基(不会产生任何可观察到的拉伸带),并提供了非对位异丙基碳的证据(与1 H-NMR光谱不同)。