C Acylation of Meldrum´s acid by (het)arylacetic acids in ethanol in the presence of 1,1' carbonyldiimidazole leads to ethyl 4 (het)aryl 3 oxobutanoates in high yields.
Nitro substituted benzothienopyrroline spiropyrans containing substituents in the ben zothienopyrroline moiety were synthesized. The comparative spectral kinetic study of the pho tochromic transformations of these compounds and their indoline analogs in solvents of various polarity was carried out. On the basis of the results obtained and literature data, the photoin duced aggregation of molecules of the merocyanine form in weakly polar solvents was sug gested.
Benzothiophene derivatives R 0100Fischer Synthesis of 1H-and 3H-[1]Benzothieno[3,2-b]pyrroles. -A range of target compounds derivatives is prepared following the sequence shown in the scheme. The reaction tolerates various functional groups in the ketone substrates and is also applicable to the pyridine-derived hydrazone (X). -(SHIMKIN, A. A.; MAILIAN, A. K.; SHIRINIAN*, V. Z.; KRAYUSHKIN, M. M.; Synthesis 2007, 17, 2706-2710; Zelinsky Inst. Org. Chem., Russ. Acad. Sci., Moscow 117913, Russia; Eng.) -Y. Steudel 01-101
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