作者:Frank Ludley、Eberhard Breitmaier
DOI:10.1055/s-1994-25611
日期:——
Synthesis of Bicyclo[2.2.1]hepta-2,5-dienyl Substituted Porphyrins (E)- and (Z)-2-(p-Formylstyryl)-3- phenylbicyclo[2.2.1]hepta-2,5-dienes (7a,b) are prepared by Wittig alkenylation of 4-(1,3-dioxolan-2-yl)benzyltriphenylphosphonium bromide (4) and 3-phenylbicyclo[2.2.1]hepta-2,5-diene-2-carbaldehyde (5) in tetrahydrofuran to give (E)- and (Z)-2-[p-(1,3-dioxolan- 2-yl)styryl]-3-phenylbicyclo-[2.2.1]hepta-2,5-diene (6a,b) in 99% yield (E/Z-ratio 64:36) and the aldehydes 7a,b, after subsequent deprotection. Reaction of the aldehyde 7a with 3,3′-diethyl-4,4′- dimethyl-2,2′-dipyrrylmethane (8) affords porphyrine 1a in 60% yield, reactions of aldehydes 7a,b with pyrrole 9 give porphyrins 2a,b in 39 and 11% yield, respectively.
双环[2.2.1]庚-2,5-二烯取代卟啉的合成 (E)-和(Z)-2-(对甲酰苯乙烯基)-3-苯基双环[2.2.1]庚-2,5-二烯(7a,b)是由 4-(1,3-二氧戊环-2-基)苄基三苯基溴化鏻(4)和 3-苯基双环[2.2.1]庚-2,5-二烯-2-甲醛(5)在四氢呋喃中反应,得到(E)-和(Z)-2-[p-(1,3-二氧戊环-2-基)苯乙烯基]-3-苯基双环[2.2.1]庚-2,5-二烯(6a,b),收率为 99%(E/Z 比为 64:36),随后经脱保护得到醛 7a,b。醛 7a 与 3,3′-二乙基-4,4′-二甲基-2,2′-二吡咯甲烷(8)反应,得到卟啉 1a,收率为 60%;醛 7a,b 与吡咯 9 反应,得到卟啉 2a,b,收率分别为 39%和 11%。