Process for the preparation of lactam-lewis acid complex
阅读：909发布：2023-12-28
专利汇可以提供Process for the preparation of lactam-lewis acid complex专利检索，专利查询，专利分析的服务。并且A process for the preparation of lactams, which comprises reacting lactim-O-sulfonic acid with a complex of alicyclic ketoxime with a halide which is a Lewis acid, and recovering the complex of lactam with the halide.，下面是Process for the preparation of lactam-lewis acid complex专利的具体信息内容。
2. The process of claim 1 wherein said halide is present in the reaction system in a quantity not exceeding an amount equimolar to said lactim-O-sulfonic acid initially present in the reaction system.
3. The process of claim 2 wherein said complex of said alicyclic ketoxime with said halide is represented by the formula, wherein m is a number of 3 to 11, M'' is tin, zirconium, boron, zinc, antimony or aluminum, X is a halogen atom, p is a number equalling the valency of M'', and a is 1/2 or 1.
4. A process for the preparation of lactams, which comprises adding to a reaction system comprising an inert organic solvent and lactim-O-sulfonic acid (a) of the formula, wherein n is a number of 3 to 11, and R1 and R2 are each a hydrogen atom, an alkyl group or alkenyl group, dissolved therein a complex compound (b) of a ketoxime of the formula, wherein n, R1 and R2 are as defined above, with a halide of the formula, MXp wherein M is an element of Groups I-B, II-B, III-A, IV-A, IV-B, V-A or VIII of the Periodic Table, X is a halogen atom, and p is a number equalling the valency of M, at such a ratio that said complex (b) does not exceed 500 mol percent based on said lactim-O-sulfonic acid (a) in the reaction system, at a temperature ranging from 20* to 100* C., and recovering the formed complex of the corresponding lactam with said halide.
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