SYNTHESIS OF NEW PYRROLINE NITROXIDES WITH ETHYNYL FUNCTIONAL GROUP

Úr, Györgyi and Kálai, Tamás and Balog, Mária and Bognár, Balázs and Gulyás-Fekete, Gergely and Hideg, Kálmán (2015) SYNTHESIS OF NEW PYRROLINE NITROXIDES WITH ETHYNYL FUNCTIONAL GROUP. SYNTHETIC COMMUNICATIONS, 45 (18). pp. 2122-2129. ISSN 0039-7911

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Abstract

3-Substituted and 3,4-disubstituted pyrroline nitroxides containing an ethynyl group or two ethynyl groups were achieved by the reaction of a paramagnetic aldehydes with dimethyl (1-diazo-2-oxopropyl)phosphonate (Bestmann–Ohira reagent). The new compounds containing an ethynyl group were found to be useful building blocks in Sonogashira coupling, cyclization, and cycloaddition reactions producing potentially “azido-specific” cross-linking spin labels, paramagnetic ligands, and polyradical scaffolds

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