Abstract
Unique tricyclic compounds with a five-coordinate phosphorus atom shared by three rings, 7-aryl-3′,5-diphenyl-3,5-dihydro-2H-spiro[1,2-oxaphospholo[2,3-d][1,2,4]diazaphosphinine-8,2′-[1,3,2]oxazaphospholidines], have been synthesized for the first time via reaction of 2-(4,5-dihydrofuran-3-yl)-3-phenyl-1,3,2-oxazaphospholidine with C,N-diarylnitrile imines. Presumably, these compounds are formed via a three-step process including generation of P+-C=N-N− dipolar ion, intramolecular N−→C= cyclization with simultaneous opening of the dihydrofuran ring, and closure of oxaphospholane ring.
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Original Russian Text © Yu.G. Trishin, V.I. Namestnikov, 2015, published in Zhurnal Obshchei Khimii, 2015, Vol. 85, No. 2, pp. 289–293.
To the 80th Anniversary of B.I. Ionin
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Trishin, Y.G., Namestnikov, V.I. Synthesis of tricyclic spirophosphoranes via reaction of 2-(4,5-dihydrofuran-3-yl)-N-phenyl-1,3,2-oxazaphospholidine with C,N-diarylnitrile imines. Russ J Gen Chem 85, 462–466 (2015). https://doi.org/10.1134/S1070363215020176
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DOI: https://doi.org/10.1134/S1070363215020176