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10 results on '"Mitan, A."'

1. ChemInform Abstract: Primary Cycloadducts of 1,10-Phenanthrolinium and Phthalazinium Phenacylides with DMAD

Author

Constantin Draghici, Florea Dumitrascu, Carmen Irena Mitan, Dan Raileanu, and Miron Teodor Caproiu

Subjects
chemistry.chemical_compound, Primary (chemistry), chemistry, Stereochemistry, Phenanthroline, Proton NMR, General Medicine, Chirality (chemistry), Isopropyl
Abstract

Primary cycloadducts cis-2 and trans-6 of monosubstituted cycloimmonium phenacylides 1 and 5 with DMAD have been obtained for the first time. They isomerise stereospecifically and regiospecifically by prototropic rearrangement to dihydro derivatives cis-3 and trans-7, respectively. The new heterocyclic system of pyrrolo[1,2-a][1,10]phenanthroline was illustrated by a series of derivatives (8a–f). The ethyl (8b) and isopropyl (8c) esters exhibit helical chirality by 1H NMR.

Published
2010
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2. New Pyrrolo[1,2-a][1,10]phenanthrolines with Helical Chirality

Author

Florea Dumitrascu, Carmen Irena Mitan, Miron Teodor Caproiu, and Constantin Draghici

Subjects
chemistry.chemical_classification, Chemistry, Ylide, Stereochemistry, General Medicine, Spectroscopy, Chirality (chemistry), Isopropyl
Abstract

The 3+2 cycloadditions reaction of 1-(4-nitrophenacyl)-1,10-phenantrolinium ylide 4 with dimethyl, diethyl and diisopropyl ester of acetilylenedicarboxylic acid is a facile synthetic route to helical pyrrolo[1,2-a][1,10]phenanthrolines 7. The helical chirality of ethyl (7b) and isopropyl (7c) esters was put into evidence by 1 H-NMR spectroscopy.

Published
2003
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