... Nobuo lkota and Bruce Ganem* Department of Chemistry, Cornell Uniuersity, Ithaca, New York 14853 Receiiied November 15,1977 ... 6 5.82 (broads, 2 H), 5.38 (d, 1 H, J = 2 Hz), 4.63 (d, 2 H, J = 2 Hz ... 1 h at -20 "C then 2 h at 0 "C. Ether was added and the organic layer tieparated ...