A New Facile Synthesis of Diethyl 1-Aryl-1-Cyanomethanephosphonates

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• Characteristics of 4. 4a; 1H-NMR(CDC13) 1.20(6H, t, POCH2CH3), 4.01(4H, dq, POCH2CH3), 4.31(1H, d, PCH, J=26Hz), 7.37(5H, s. ArH); IR(CHC13) 2250(w), 1260(s), 1020(vs); Mass(m/e, rel. intens., %) 253(M+, 18.5), 117(92.9), 109(100). 4b; 1H-NMR (CDC13) 1.21(6H, t, POCH2CH3), 3.78(3H, s, OCH3), 4.0(4H, dq, POCH2CH3), 4.30 (1H, d, PCH, J=26Hz), 6.80–7.7U(4H, m, ArH); IR(CHC13) 2245(w) 1260(s), l035(vs); Mass(m/e, rel. intens., %) 283(M+, 14.5), 147(90. l), 109(100). 4c; 1H-NMR(CDCl3) 1.20(6H, t, POCH2CH3), 3.75(3H, s, OCH3) 4.04(4H, dq, POCH2CH3), 4.35 (1H, d, PCH, J=25.5Hz), 6.85–7.70(4H, m, ArH); IR(CHC13) 2240(w), 1260(s), 1030–1010(vs); Mass(m/e, rel. intens., %) 283 (M+, 11.5), 147(100), 109(94.1). 4d; 1H-NMR(CDC13) 1.20(6H, t, POCH2CH3), 4.06(4H, dq, POCH2CH3) 4.35(1H, d, PCH, J=26Hz), 7.15–7.55(4H, m, ArH); IR(CHC13) 2260(w), 1260(s), 1040–1010 (vs); Mass(m/e, rel. intens., %) 287(M+, 6.8), 152(11.0), 151(32.4), 150(28.8), 109(100). 4e; 1H-NMR(CDC13) 1.20(6H, t, POCH2CH3) 4.12(4H, dq, POCH2CH3), 4.70(1H, d, PCH, J=26Hz) 7.10–7.55(4H, m, ArH); IR(CHC13) 2230(w), 1260(s), 1030–1010 (vs); Mass (m/e, rel. intens., %) 287(M+, 4.2) 151(31.4) 150 (28.8), 109(100). 4f; 1H-NMR(CDC13) 1.20(6H, t, POCH2CH3), 2.21(3H, S, CH3), 3.98(4H, dq, POCH2CH3), 4.30(1H, d, PCH, J=25Hz), 7.10–7.55(4H, m, ArH); IR(CHC13) 2250(w), 1260(s), 1020(vs); Mass(m/e, rel. intens., %) 267(M+, 20.7), 131(100), 109(97.6
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