首页>
外国专利>
ADDRESS OF THE CYCLOPENT METHOD AND SWAVELDIOXIDE MARKET AND ITS MANUFACTURING AUTHORISATION HOLDER
ADDRESS OF THE CYCLOPENT METHOD AND SWAVELDIOXIDE MARKET AND ITS MANUFACTURING AUTHORISATION HOLDER
展开▼
机译:闭环法和二氧化钨市场的地址及其制造授权人
展开▼
页面导航
摘要
著录项
相似文献
摘要
A method for the preparation of omega lactams is disclosed, more particularly epsilon caprolactam or a precursor thereof (such as cyclohexanone oxime), using as the starting material a cyclomethylene ketene, with the simultaneous formation of side products such as cyclohexanecarboxylic acid, wherein an adduct is preliminarly formed between cyclomethylene ketene and sulphur dioxide. The adduct is then reacted with a nitrosating agent so as to obtain, under the appropriate reaction conditions, the expected lactam, more specifically epsilon caprolactam.
展开▼