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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 21, Number 6
BKCSDE 21(6)
June 20, 2000 

Synthesis and NMR Studies of Core-Modified, N-Confused Porphyrins Possessing Alkyl Groups at the Rim Nitrogen
Dae-Wi Yoon, Chang-Hee Lee
The '3+1'type condensation of 16-thiatripyrromethane with N-alkyl-2,4-bis[(α+hydroxy-α-phenyl)methyl]pvrole in the presence of acid catalyst afforded core-modified, N-confused porphyrins bearing alkyl groups at the rim nitrogen. The proton NMR spectra indicate that the bulkiness of the N-alkyl substituents is somewhat relatedwith the tiltedness of the inverted pyrrole ring. The changes in chemical shift of inner methine protons depending on the N-alkyl group and protonation site is discussed.
618 - 622
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