Premium
The reactions of pyranylidenemethylpyrylium salts with sodium sulfide
Author(s) -
Reynolds G. A.,
Van Allan J. A.
Publication year - 1972
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.5570090526
Subject(s) - chemistry , ring (chemistry) , sulfur , alkyl , sodium sulfide , sulfide , methylene , aryl , medicinal chemistry , sodium salt , sodium , oxygen atom , group (periodic table) , organic chemistry , inorganic chemistry , molecule
Symmetrical pyranylidenemethylpyrylium salts react with sodium sulfide to give, after acidification, pyranylidenemethylthiapyrylium salts. In the case of unsymmetrical salts in which the methylene group is joined at the 2‐position of one ring and the 4‐position of the other, the ortho oxygen atom is displaced by sulfur. An unsymmetrical dye which is substituted in the 2,6‐positions of one ring with phenyl groups and with alkyl groups in the other ring gave a product which contained the sulfur atom in the aryl‐substituted ring.