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作者利用分阶段控制温度加溴的方法,制备α-溴代异丁酰溴获得成功。首次报道其红外光谱、~1H-NMR、~(13)C-NMR谱数据,并将文献报道的折光率n~(14)1.4552(与异丁酰溴相同)较正为n~(15-16)1.5140-1.5120。为了将2-叔丁氧羰丙基引入噻甲羧肟头孢
The authors make use of the method of controlling the temperature and adding bromine by stages to prepare α-bromoisobutyryl bromide for success. The 1H-NMR and ~ (13) C-NMR data were reported for the first time, and the reported refractive index n ~ (14) 1.4552 (same as isobutyryl bromide) 16) 1.5140-1.5120. In order to introduce 2-tert-butoxycarbonylpropyl into cefotaxime