Heterocyclization with iminium chlorides, V. Condensation of 1,3‐dichlorotrimethinecyanines with 1,3‐ and 1,2‐dinucleophiles

Gábor Tóth, Attila Kovács, I. Bitter, Helmut Duddeck

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Cyclic 1,3‐dichlorotrimethinecyanines 1 were used for the preparation of condensed polycycles 2–13 with high regioselectivity. In the case of five‐membered cyanines the exclusive formation of the linear‐type products was observed, while with six‐ and seven‐membered cyanines the linear or angular type of products were obtained, depending on the character of the nucleophile. The structures of the products were supported by 1H‐, 13C‐ and 15N‐NMR data, NOE difference spectroscopy, and different two‐dimensional carbon‐proton correlation measurements.

Original languageEnglish
Pages (from-to)1215-1219
Number of pages5
JournalLiebigs Annalen der Chemie
Volume1991
Issue number11
DOIs
Publication statusPublished - 1991

Keywords

  • N‐Heterocycles, condensed, regioselective synthesis of, structure elucidation of

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry

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