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Synthesis of two novel ring systems via photocyclization: Thieno[2′,3′:4,5]thieno[2,3‐ c ][1,10]phenanthroline and thieno[3′,2′:4,5]thieno[2,3‐ c ][1,10]phenanthroline
Author(s) -
Halverson Aileen Pfleider,
Castle Lyle W.,
Castle Raymond N.
Publication year - 1996
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570330121
Subject(s) - chemistry , phenanthroline , ring (chemistry) , stereochemistry , molecule , proton nmr , combinatorial chemistry , crystallography , organic chemistry
The synthesis of thieno[2′,3′:4,5]thieno[2,3‐ c ][1,10]phenanthroline ( 5 ) and thieno[3′,2′:4,5]thieno‐[2,3‐ c ][1,10]phenanthroline ( 10 ) are described. Each compound was obtained in four steps from known starting materials. The basic skeleton of the molecule and of the phenanthroline ring were formed via photocyclization. The total assignment of 1 H‐nmr spectra was accomplished with the aid of two‐dimensional nmr methods.