Cyclic tetramer of a metalloporphyrin based on a quadruple hydrogen bond

Haruki Ohkawa, Akihiro Takayama, Satoshi Nakajima, Hiroyuki Nishide*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)2225-2228
Number of pages4
JournalOrganic Letters
Issue number11
Publication statusPublished - 2006 May 25

ASJC Scopus subject areas

  • Molecular Medicine


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