... The inorganic precipitate was removed the organic layer was evaporated to give 5 (13.5 g, 85%) as ... CDC13) 6 8.11 (1 H, dd, J = 7.5, 1.5 Hz), 7.43 (1 H, td, J = 7.5, ... Minh Tho Nguyen and Anthony F. Hegarty* Department of Chemistry, University College, Belfield, Dublin 4, Ireland ...