Synthesis of a linear bis-porphyrin with a Ru(phen)22+-complexed 2,2′-bipyridine spacer
作者:James I. Bruce、Jean-Claude Chambron、Philipp Kölle、Jean-Pierre Sauvage
DOI:10.1039/b202407c
日期:2002.5.10
A linear bis-porphyrin bridged by a 5,5â²-diphenyl-2,2â²-bipyridine rod-like spacer complexing a [Ru(phen)2]2+ fragment has been synthesized in 7.4% yield by one-pot condensation of 3,5-di-tert-butylbenzaldehyde, 4,4â²-dimethyl-3,3â²-dihexyl-2,2â²-methylenedipyrrole and the [Ru(phen)2]2+ complex of 5,5â²-bis(p-formylphenyl)-2,2â²-bipyridine, followed by chloranil oxidation. The protected dialdehyde (5,5â²-bis[(5,5-dimethyl-1,3-dioxan-2-yl)phenyl]-2,2â²-bipyridine) was obtained in 80% yield by Suzuki coupling of 2-[4-(5,5-dimethyl-1,3-dioxan-2-yl)phenyl]-4,4,5,5-tetramethyl-1,3-dioxaborolane and 5,5â²-dibromo-2,2â²-bipyridine, using [Pd(PPh3)4] as catalyst. A new procedure is reported for the preparation of 5,5â²-dibromo-2,2â²-bipyridine, which is obtained in 80% yield by Stille homocoupling of 2,5-dibromopyridine
in the presence of hexamethylditin.
通过3,5-二叔丁基苯甲醛、4,4²-二甲基-3,3²-二己基-2,2²-亚甲基二吡咯和5,5²-双(对甲酰基苯基)-2,2²-联吡啶的[Ru(苯)2]2+络合物的一锅缩合,并随后进行氯醌氧化,合成了线性双卟啉桥联的5,5²-二苯基-2,2²-联吡啶棒状间隔体,收率为7.4%。通过2-[4-(5,5-二甲基-1,3-二恶烷-2-基)苯基]-4,4,5,5-四甲基-1,3-二氧硼戊环和5,5²-二溴-2,2²-联吡啶的铃木偶联,并使用[Pd(PPh3)4]作为催化剂,获得了保护二醛(5,5²-二[(5,5-二甲基-1,3-二恶烷-2-基)苯基]-2,2²-联吡啶),收率为80%。报告了一种制备5,5²-二溴-2,2²