Detection of Elusive Chloro- and Bromo Substituted Ozonides by nucleophilic substitution reactions
作者:K. Griesbaum、Konrad Schlindwein、Herbert Bettinger
DOI:10.1002/prac.19963380162
日期:——
Ozonolyses of 2,3-dichloro-2-butene (4), 4,5-dichloro-4-octene (9) and 2,3-dibromo-1,4-dichloro-2-butene (12) on polyethylene gave the corresponding ozonides 5, 10 and 13a, respectively, which could not be isolated or unequivocally identified. Their identity could be proven, however, via substitution of the chloro- or bromo substituents at the ozonide rings by stabilizing substituents and subsequent isolation of the substituted ozonides 6, 11, 13b and 13c. Ozonolysis of 2,3-diacetoxy-2-butene (14) on polyethylene, in dichloro methane and in pentane gave mixtures of 16 and 17 but not ozonide 6.