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Typical Experimental Procedure: To a solution of diphenyl ditelluride (0.6 mmol) in anhyd MeOH (2 mL) was added dropwise a solution of Br2 (0.60 mmol) and MeOH (1.2 mL) under nitrogen atmosphere. The mixture was stirred at r.t. for 2 h. Then 1,2-allenic phosphonates 1 (1.0 mmol) in anhyd MeOH (2 mL) was added to the above PhTeBr solution with stirring, and the reaction mixture was heated to 55°C After the reaction was complete (2 h, the mixture was concentrated and the residue was purified by flash chromatography to afford 4-(phenyltelluro)-1,2-oxaphosphol-3-ene 2-oxides 2. Compound 2a: white solid; mp 148-150°C 1H NMR (400 MHz, CDCl3, δ, 7.85-7.87 (m, 2 H, 7.29-7.49 (m, 3 H, 5.59 (d, J, 30.3 Hz, 1 H, 3.69 (d, J, 11.9 Hz, 3 H, 1.61 (s, 3 H, 1.55 (s, 3 H, 13C NMR (100 MHz, CDCl3, δ, 156.5 (d, J, 15.1 Hz, 140.9, 130.2, 129.9, 117.3 d, J, 154
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+], 77(100), 102(76), 51(74), 43(53), 67(46).
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CCDC 661519 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge via www.ccdc.cam.ac.uk/ data_request/cif, or by emailing data_request@ccdc.cam.ac.uk, or by contacting The Cambridge Crystallographic Data Centre, 12, Union Road, Cambridge CB2 1EZ, UK; fax: +44(1223)336033.
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CCDC 661519 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge via www.ccdc.cam.ac.uk/ data_request/cif, or by emailing data_request@ccdc.cam.ac.uk, or by contacting The Cambridge Crystallographic Data Centre, 12, Union Road, Cambridge CB2 1EZ, UK; fax: +44(1223)336033.
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