... 3, c, p-ClC 6 H 4, 52, 7 d,e. 4, d, p-BrC 6 H 4, 44, 6 c,e. a After chromatography. b Not detected. c Ref. ... Soc., Perkin Trans. 1 1977, 239; 2 Pinho e Melo TMVD. Lopes CSJ. Rocha Gonsalves AMd' A. Storr RC. Synthesis 2002, 605; 3a Padwa A. Smolanoff J. Tremper A. Tetrahedron ...