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

✍ Scribed by Tóth, Gábor ;Kovács, Attila ;Bitter, István ;Duddeck, Helmut

• Book ID: 102367978
• Publisher: John Wiley and Sons
• Year: 1991
• Tongue: English
• Weight: 373 KB
• Volume: 1991
• Category: Article
• ISSN: 0947-3440
• DOI: 10.1002/jlac.1991199101208

✦ Synopsis

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 ^1^H‐, ^13^C‐ and ^15^N‐NMR data, NOE difference spectroscopy, and different two‐dimensional carbon‐proton correlation measurements.