Application of 1070-64-0,Some common heterocyclic compound, 1070-64-0, name is Ethyl 6,8-dichlorooctanoate, molecular formula is C10H18Cl2O2, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.
600 kg (2.48 kmol) racemic 6,8-dichloroethyl caprylate and 78 kg (2.43 kmol, 0.98 equiv.) sulphur in 576 kg ethanol were placed in a 6 m3 reactor with stirrer, metering pump, pressure and internal temperature measurement and also jacket heating. At an internal temperature of 110 C. and a pressure of 0.35 MPa, 2062 kg of an aqueous sodium sulphide solution (12.3 wt. %) comprising 253.6 kg Na2S (3.24 kmol, 1.31 equiv.) was metered in uniformly with stirring over a period of 85 min. The reaction mixture was stirred for another 120 min at 110 C. Then 508 g of a solution of sodium borohydride (12 wt. %) in sodium hydroxide solution (40 wt. %) comprising 61.0 kg NaBH4 (1.61 kmol, 0.65 equiv.) was metered in uniformly within 90 min. at 70 C. The ethanol contained was distilled off from the reaction mixture to the greatest possible extent, and thereupon a further 253 kg of a solution of sodium borohydride (12 wt. %) in sodium hydroxide solution (40 wt. %) comprising 30.4 kg NaBH4 (0.80 kmol, 0.32 equiv.) added over a period of 60 min. at 70 C. Once addition had taken place, the mixture was heated to boiling and stirred further for 30 min. at this temperature. After cooling, 540 kg MTBE was added and the batch was acidified to a pH value of 2.6 to 3.0 by adding 1454 kg (12.3 kmol) hydrochloric acid (31 wt. %). The organic phase was separated off and the organic solvent was distilled off completely without a vacuum. 506 kg of a yellow liquid was obtained, with a content of 94.0 wt. % dihydrolipoic acid and a polymer content of 5.6 wt. % (corresponds to a yield of 91.8% of theory).
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route Ethyl 6,8-dichlorooctanoate, its application will become more common.
Reference:
Patent; ALZCHEM TROSTBERG GMBH; SCHNAPPERELLE, Ingo; WINKLER, Stephan; SANS, Juergen; THALHAMMER, Franz; (7 pag.)US2019/276396; (2019); A1;,
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