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2005
Ring closure reactions
O 0130
Fluorine-Containing 1,1-Dicyanoethylenes in Heterocyclization Reactions. Part 7.
and Some Heterocyclization Reactions of New Diethyl (1,1-Difluoro21- 044 Synthesis
-3,3-dicyano-2-trifluoromethylallyl)phosphonate and Ethyl 3,3-Dicyano-2-[(diethoxyphosphoryl)difluoromethyl]acrylate. — The synthesis of the title compounds (IV) and examples of their heterocyclization reactions are presented. Unexpectedly, the condensation of (IVb) with anilines and acetone affords 2-arylaminopyridines,
e.g., (XXI), instead of the 1-aryl-2-aminopyridines obtained from (IVa), for example
(XIX). A similar behavior is observed in reactions with cyclohexanone. —
(PASTERNAK, P. V.; AVERKIEV, B. B.; ANTIPIN, M. Y.; PEREGUDOV, A. S.;
CHKANIKOV*, N. D.; J. Fluorine Chem. 125 (2004) 12, 1853-1868; Nesmeyanov
Inst. Organoelem. Compd., Russ. Acad. Sci., Moscow 117813, Russia; Eng.) —
D. Singer
2005
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