Photochromic dihetarylethenes. 14. Synthesis of symmetrical and unsymmetrical dihetarylcyclobutene-1,2-diones

Photochromic dihetarylethenes. 14. Synthesis of symmetrical and unsymmetrical dihetarylcyclobutene-1,2-diones Full article

Journal

Russian Chemical Bulletin
ISSN: 1573-9171 , E-ISSN: 1066-5285

Output data

Year: 2002, Volume: 51, Number: 8, Pages: 1515-1518 Pages count : 4 DOI: 10.1023/a:1020975326034

Authors

Krayushkin M.M. ¹ , Shirinian V.Z. ¹ , Belen"kii L.I. ¹ , Shadronov A.Yu. ¹

Affiliations

1	Russian Academy of Sciences, N. D. Zelinsky Institute of Organic Chemistry, 47 Leninsky prosp., 119991, Moscow, Russian Federation

A procedure was developed for the synthesis of symmetrical and unsymmetrical cyclobutene-1,2-dione derivatives bearing thiophene and thieno[3,2-b]thiophene substituents by the Friedel—Crafts reaction of the corresponding heterocyclic compounds with squaric acid dichloride in the presence of AlCl3. In addition to the target dihetarylcyclobutenediones, monoacylation products of methyl (2,5-dimethylthiophen-3-yl)acetate and methyl 5-methylthieno[3,2-b]thiophene-2-carboxylate with squaric acid dichloride were isolated and characterized.

Krayushkin M.M. , Shirinian V.Z. , Belen"kii L.I. , Shadronov A.Y.
Photochromic dihetarylethenes. 14. Synthesis of symmetrical and unsymmetrical dihetarylcyclobutene-1,2-diones
Russian Chemical Bulletin. 2002. V.51. N8. P.1515-1518. DOI: 10.1023/a:1020975326034 WOS OpenAlex

Web of science:	WOS:000179677800018
OpenAlex:	W2949550134

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