Syn-Anti Selectivity in Cycloadditions. 6. Cycloadditions of Benzonitrile Oxide, 2-Diazopropane, and Diphenylnitrilimine to Polychloronorbornadienes

Article abstract of DOI:10.1021/jo01295a008

Benzonitrile oxide, 2-diazopropane, and diphenylnitrilimine react smoothly at the unsubstituted double bond of 2,3-dichloro-, 1,2,3,4-tetrachloro-, 1,2,3,4,7-pentachloro-, and 1,2,3,4,7,7-hexachloronorbornadiene to give mixtures of syn and anti adducts.Th