Solutions of carbonyl compounds in dibromodifluoromethane in the presence of hydrogen bromide: protonation of ketones and formation of 1 -bromo-alcohols from aldehydes
作者:John Emsley、Victor Gold、M. Jamil B. Jais、Leszek Z. Zdunek
DOI:10.1039/p29820000881
日期:——
HBr in CBr2F2 is capable of protonating a variety of ketones, and at low temperatures separate 1H n.m.r. signals can be seen for the acid and protonated base. Line shape analysis of the signals enables rates of protonation to be calculated. Aldehydes in HBr–CBr2F2 give n.m.r. spectra that are consistent with the formation of 1-bromoalcohols.
CBr 2 F 2中的HBr能够使各种酮质子化,并且在低温下可以看到酸和质子化碱的1 H nmr信号。信号的线形分析可以计算质子化率。HBr–CBr 2 F 2中的醛具有与1-溴代醇形成一致的nmr光谱。