2014
Synthesis and Properties of 6-Methoxy- and 6-Dimethylamino-1-methylthio- and 1,3-Bis(methylthio)azulenes and Triflic Anhydride-Mediated Synthesis of Their Biaryl Derivatives
Bulletin of the Chemical Society of Japan
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- Volume
- 87
- Number
- 1
- First page
- 141
- Last page
- 154
- Language
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1246/bcsj.20130275
6-Methoxy- and 6-dimethylaminoazulenes with methylthio groups at the 1- or 1,3-positions have been prepared by electrophilic substitution of the corresponding azulenes with DMSO in the presence of acid anhydride, followed by treatment with Et 3 N. The products, 1-methylthioazulenes, reacted with Tf 2 O to afford the corresponding 1,1′-biazulene derivatives in moderate yields. The redox behavior of these azulene and 1,1′-biazulene derivatives was examined by cyclic voltammetry (CV), which revealed reversible electron transfers under electrochemical oxidation conditions. 6-Dimethylamino-1,3-bis(methylthio)azulenes with a heteroaiyl group at the 2-position were also prepared by the reaction of 6-dimethylamino-1,3- bis(methylthio)azulene with triflates of iV-containing heterocycles, i.e., pyridine, quinoline, isoquinoline, acridine, and 1,10-phenanthroline, followed by treatment with KOH in alcohols. © 2013 The Chemical Society of Japan.
- Link information
- ID information
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- DOI : 10.1246/bcsj.20130275
- ISSN : 0009-2673
- ORCID - Put Code : 53156906
- SCOPUS ID : 84892879395
- Web of Science ID : WOS:000329895600013