Gleim F, Schnakenburg G, Ferao AE, Streubel R. Arbuzov meets 1,2-oxaphosphetanes: transient 1,2-oxaphosphetan-2-iums as an entry point to beta-halo phosphane oxides and P-containing oligomers.
Chem Commun (Camb) 2024;
60:2625-2628. [PMID:
38334361 DOI:
10.1039/d4cc00254g]
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Abstract
Herein, we describe the synthesis of a 1,2σ3λ3-oxaphosphetane from ethylene oxide and its reactions with alkyl halides to form β-halo phosphane oxides in an Arbuzov-type reaction. When methyl triflate was used as a hard electrophile, cationic oligomerisation of 1,2-oxaphosphetanes was observed. DFT calculations indicate 1,2-oxaphosphetan-2-iums as intermediates and reveal differences between the Arbuzov and the potential Perkow reaction pathway.
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