GB690238A - Process of producing 3, 4-dimethyl-5-phenyl-2-iminothiazolidine - Google Patents

Process of producing 3, 4-dimethyl-5-phenyl-2-iminothiazolidine

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Publication number
GB690238A
GB690238A GB19568/50A GB1956850A GB690238A GB 690238 A GB690238 A GB 690238A GB 19568/50 A GB19568/50 A GB 19568/50A GB 1956850 A GB1956850 A GB 1956850A GB 690238 A GB690238 A GB 690238A
Authority
GB
United Kingdom
Prior art keywords
phenyl
methylaminopropane
chloro
heating
hydrochloride
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB19568/50A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Abbott GmbH and Co KG
Original Assignee
Knoll GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Knoll GmbH filed Critical Knoll GmbH
Publication of GB690238A publication Critical patent/GB690238A/en
Expired legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The invention comprises 3,4-dimethyl-5-phenyl-2-iminothiazolidine in its racemic and in its optically active forms, and also its preparation by the action of a salt of thiocyanic acid on 1 - phenyl - 1 - halogen - 2 - methylaminopropane hydrohalide in the presence of a solvent or suspension medium and preferably in an alkaline medium. In a modification, the reaction components are first heated in an acid medium and the 1-phenyl-1-thiocyan-2-methylaminopropane so formed is then heated in an alkaline medium. The optically active products are obtained by starting from the optically active 1-phenyl-1-halogen - 2 - methylaminopropane hydrohalogenides. Suitable solvents or suspension media are water, methanol, ethanol, butyl ether, chlorinated hydrocarbons, benzene and pyridine, and suitable alkaline materials are caustic alkali, ammonia, methylamine, aniline, ephedrine, pyridine and quinoline. In example (1), racemic 1 - phenyl - 1 - chloro - 2 - methylaminopropane hydrochloride is suspended in ethyl alcohol with ammonium thiocyanate and caustic soda or caustic potash and heated under reflux to yield the thiocyanate of 3,4-dimethyl - 5 - phenyl - 2 - iminothiazolidine; l - 1 - phenyl - 1 - chloro - 2 - methylaminopropane hydrochloride similarly treated yields the salt of d-3,4-dimethyl-5-phenyl-2-iminothiazolidine, and vice versa. In other examples, the thiocyanic salt of 3,4-dimethyl-5-phenyl-2-iminothiazolidine is prepared by (2) heating a suspension of 1-phenyl-1-chloro-2-methylaminopropane hydrochloride in an aqueous solution of ammonium thiocyanate and sodium acetate; (3) heating a suspension of 1-phenyl-1-chloro-2-methylaminopropane hydrochloride with ammonium thiocyanate and a little hydrochloric acid, and heating the 1-phenyl-1-thiocyan-2-methylaminopropane hydrothiocyanate so formed in aqueous caustic soda; (4) heating 1-phenyl-1-chloro - 2 - methylaminopropane hydrochloride and ammonium thiocyanate in a mixture of ethylene chloride and pyridine; (5) heating a mixture of 1-phenyl-1-chloro-2-methylaminopropane hydrochloride, ammonium thiocyanate and l - 1 - phenyl - 1 - oxy - 2 - methylaminopropane suspended in ethylene chloride; and (6) by heating the thiocyanic acid salt of 1-phenyl-1-thiocyano-2-methylaminopropane and caustic soda in water.
GB19568/50A 1949-08-23 1950-08-04 Process of producing 3, 4-dimethyl-5-phenyl-2-iminothiazolidine Expired GB690238A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US690238XA 1949-08-23 1949-08-23

Publications (1)

Publication Number Publication Date
GB690238A true GB690238A (en) 1953-04-15

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ID=22086217

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19568/50A Expired GB690238A (en) 1949-08-23 1950-08-04 Process of producing 3, 4-dimethyl-5-phenyl-2-iminothiazolidine

Country Status (1)

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GB (1) GB690238A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1001281B (en) * 1953-10-29 1957-01-24 Cassella Farbwerke Mainkur Ag Process for the production of therapeutically valuable rhodane compounds
FR2024952A1 (en) * 1968-11-29 1970-09-04 Sandoz Sa
FR2034463A1 (en) * 1969-01-13 1970-12-11 Sandoz Sa
US4665083A (en) * 1984-04-25 1987-05-12 Egis Gyogyszergyar Iminothiazolidine derivatives

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1001281B (en) * 1953-10-29 1957-01-24 Cassella Farbwerke Mainkur Ag Process for the production of therapeutically valuable rhodane compounds
FR2024952A1 (en) * 1968-11-29 1970-09-04 Sandoz Sa
FR2034463A1 (en) * 1969-01-13 1970-12-11 Sandoz Sa
US4665083A (en) * 1984-04-25 1987-05-12 Egis Gyogyszergyar Iminothiazolidine derivatives

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