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DOI: 10.1039/A805403G (Paper) Reference Section for: J. Chem. Soc., Perkin Trans. 1, 1998, 3323-3324

Unexpected tetrahydrophosphepine oxides by the ring enlargement of tetrahydrophosphinine oxides

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György Keglevich, Hoang Thi Thai Thanh, Áron Szöllősy, Kálmán Újszászy and László Tőke

Abstract

Reaction of the regioisomers (A and B) of tetrahydrophosphinine oxide 1 with NaOH–H2O–CHCl3 under PTC conditions affords tetrahydrophosphepine oxides 2A and 2B through an unexpected path involving isomerisation of 1 and cyclopropanation via Michael addition of CCl3–.

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