Bicyclo[2.2.2]octadiene(BCOD)-fused dithiaamethyrin 4 was synthesized via a “3+3” condensation method. Thermal conversion of the BCOD moieties afforded tetrabenzodithiaamethyrin 5. The highly planar structures of 4 and 5 were confirmed by X-ray diffraction studies. The 1H NMR, absorption and MCD spectra, together with TD-DFT calculations revealed that both BCOD-fused and π-extended dithiaamethyrins
双环[2.2.2]辛二烯(BCOD)-稠合二硫甲氰菊酯4被合成了通过“3+3”冷凝法。BCOD部分的热转化得到四苯并二硫代甲氰菊酯5. 高度平面结构4和5经 X 射线衍射研究证实。1 H NMR、吸收和 MCD 光谱以及 TD-DFT 计算表明,BCOD 融合和π- 扩展二硫甲氰菊酯有 24π反芳香性。
An efficient synthesis of conjugation-expanded carba- and azuliporphyrins using a bicyclo[2.2.2]octadiene-fused tripyrrane
作者:Tetsuo Okujima、Naoki Komobuchi、Yusuke Shimizu、Hidemitsu Uno、Noboru Ono
DOI:10.1016/j.tetlet.2004.05.041
日期:2004.7
A bicyclo[2.2.2]octadiene-fused tripyrrane was synthesized as a first versatile reagent for the preparation of pi-expanded heteroporphyrins. The reaction of the tripyrrane with 1,3-diformylindene and azulene-1,3-dicarbaldehyde afforded the corresponding heteroporphyrins. which were easily converted into tetrabenzocarbaporphyrin and tribenzoazuliporphyrin by retro Diels-Alder reaction. (C) 2004 Elsevier Ltd. All rights reserved.