Regioselectivity of 1, 3-dipolar cycloadditions of (phenylsulfinyl)-and (phenylsulfonyl) alkenes

…, P Dalla Croce, P Del Buttero, E Licandro…

Index: Barzaghi, Mario; Beltrame, Pier Luigi; Dalla Croce, Piero; Del Buttero, Paola; Licandro, Emanuela; et al. Journal of Organic Chemistry, 1983 , vol. 48, # 21 p. 3807 - 3810

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Abstract

NMR (CDCl,) 6 1.27 (d, J= 7.0 Hz, 6 H), 1.38 (d, J= 7.0 Hz, 3 H), 3.12 (septet, J= 7.0 Hz, 1 H), 5.05 (septet, J= 7.0 Hz, 1 H);"% NMR (CDC13) 6-70.3 (d, J= 7.0 Hz); IR (neat) 1745 cm-'(C= O); mass spectrum, m/e 184 (M'). Anal. Calcd for C7HllF302: C, 45.65; H, 6.02. Found: C, 45.68; H, 5.92. Ethyl 4, 4, 4-trifluorobutyrate [3a-(a)]:"'H NMR (CDCl,) 6 1.27 (t, J= 6.6 Hz, 3 H), 2.1-2.7 (m, 4 H), 4.15 (4, J= 6.6 Hz, 2 H); 19F NMR (CDC13) 6-67.7 (t, J= 10.5 Hz); IR ( ...