期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 11, 期 21, 页码 6221-6227出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200500291
关键词
heterocycles; phosphorus; selenium; Woollins reagent; X-ray structure
资金
- Engineering and Physical Sciences Research Council [GR/S61386/01] Funding Source: researchfish
A new and improved method for the preparation of (PhPSe2)(2) (Woollins reagent (WR), 1) is reported. Reaction of dichlorophenylphosphine with Na2Se, (prepared from the reaction of elemental selenium and sodium in liquid ammonia) gives WR with excellent purity, high yield and on a larger scale than was previously possible. Four novel phosphorus-selenium heterocycles, including a spirocyclic heterocycle exhibiting a four-membered P2SeC ring, were obtained from the reaction of WR with two reactive substrates (diphenylcyclopropenone and methyl phenylpropiolate). Useful selenocarbonyl and thiocarbonyl compounds were obtained from the reaction of both WR and Lawesson's reagent with diphenylcyclopropenone. All new compounds were characterised spectroscopically and three demonstrative X-ray structures are reported.
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