四氧化硫 → 六氯-1,3-丁二烯

HRID 46751

反应方程式

HRID 46751 反应方程式
ClC1(Cl)C(=O)C(Cl)=C1Cl.[Cl:10][C:11]1([Cl:19])[C:14]([Cl:15])=[C:13]([Cl:16])[C:12]1([Cl:18])[Cl:17].S(=O)(=O)(O)O.S(=O)(=O)=O>>[Cl:10][C:11]1([Cl:19])[C:14]([Cl:15])=[C:13]([Cl:16])[C:12]1([Cl:18])[Cl:17].[Cl:10][C:11]([Cl:19])=[C:14]([Cl:15])[C:13]([Cl:16])=[C:12]([Cl:18])[Cl:17]

参与物

6

反应物 4

HCID 1118四氧化硫2 次HCID 185452,3,4,4-Tetrachloro-2-cyclobuten-1-oneHCID 22504Hexachlorocyclobutene2 次HCID 24682三氧化硫2 次

产物 2

HCID 6901六氯-1,3-丁二烯HCID 22504Hexachlorocyclobutene

实验过程

Tetrachlorocyclobutenone, required as a starting material, is obtained with high yields and conversions by a not yet published process from hexachlorocyclobutene and a mixture of sulphuric acid and sulphur trioxide at elevated temperatures, e.g., by reaction of 1 mol hexachlorocyclobutene with approximately 1 mol each of sulphuric acid and sulphur trioxide at a temperature of 80° C. within 5 hours. Hexachlorocyclobutene can be obtained from hexachloro-1,3-butadiene in yields of near 100% of theory (DE-OS No. 26 18 557), corresponding to U.S. Pat. No. 4,115,460), for example by rectifying commercial hexachlorobutadiene at a pressure of from 2 to 100 mm Hg with a reflux ratio of from 300:1 to 600:1, subjecting hexachlorobutadiene remaining in the bottoms to a heat treatment at from 150° to 200° C. and then returning it to the rectifying column together with fresh commercial hexachlorobutadiene while withdrawing the product rich in hexachlorocyclobutene over the top. A suitable starting material is not only pure tetrachlorocyclobutenone but also crude tetrachlorocyclobutenone which may, for example, contain hexachlorobutadiene and hexachlorocyclobutene originating from its process of manufacture.

后处理

  1. customis obtained
  2. customwith high yields

来源与证据

ORD记录
ord-836302dff01f4cb2b1919c94896ee549
来源数据集
uspto-grants-1979_11
专利号
US04175095

关联笔记

加载中…