Ohkawa Haruki, Takayama Akihiro, Nakajima Satoshi, Nishide Hiroyuki
Consolidated Research Institute for Advanced Science and Medical Care, Waseda University (ASMeW), Shinjuku, Tokyo, Japan.
Org Lett. 2006 May 25;8(11):2225-8. doi: 10.1021/ol060488u.
[reaction: see text] This paper describes the selective formation of a cyclic tetramer from a readily synthesized metalloporphyrin with two self-complementary quadruple hydrogen-bonding units. The extremely strong quadruple hydrogen-bonding unit, 2-ureido-4[1H]-pyrimidinone, enabled the formation of a stable cyclic tetramer based on a tetraphenylporphyrin derivative over a wide concentration range. This hydrogen-bonded tetramer is a new functional unit for use in a higher-ordered architecture of a supramolecular porphyrin assembly.
[反应：见正文] 本文描述了从一种易于合成的带有两个自互补四重氢键单元的金属卟啉选择性形成环状四聚体的过程。极强的四重氢键单元2-脲基-4[1H]-嘧啶酮能够在很宽的浓度范围内基于四苯基卟啉衍生物形成稳定的环状四聚体。这种氢键连接的四聚体是用于超分子卟啉组装体高阶结构的一种新型功能单元。
