Synthesis of 3?-acyl-substituted indoline spiropyrans
Autor: | N. P. Samoilova, M. A. Gal'bershtam, N. N. Artamonova |
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Rok vydání: | 1975 |
Předmět: | |
Zdroj: | Chemistry of Heterocyclic Compounds. 11:167-172 |
ISSN: | 1573-8353 0009-3122 |
DOI: | 10.1007/bf00471390 |
Popis: | The reaction of 1,3,3-trimethyl-ω-formyl-2-methyleneindoline with substituted salicylaldehydes in most organic solvents is accompanied by decarbonylation and gives known spiropyrans that do not contain a formyl group; however, 3′-formyl-substituted spiropyrans can be obtained in low yields in dimethyl sulfoxide. The reaction of 1,3,3-trimethyl-ω-acetyl-2-methyleneindoline with 3-bromo-5-nitrosalicylaldehyde gave a 3′-acetyl-substituted compound in the open merocyanine form with a branched chromophore chain. 3′-Acyl-substituted indoline spiropyrans can be obtained by acylation of the appropriate compounds that do not contain substituents in the 3′ position. Indoline spiropyrans with 3′-acyl substitutents do not have photochromic properties. |
Databáze: | OpenAIRE |
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