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ES247829A1 - Improvements in or relating to the production of substituted tetrahydro-1,4-oxazines

ES247829A1 - Improvements in or relating to the production of substituted tetrahydro-1,4-oxazines - Google PatentsImprovements in or relating to the production of substituted tetrahydro-1,4-oxazines Info
Publication number
ES247829A1
ES247829A1 ES0247829A ES247829A ES247829A1 ES 247829 A1 ES247829 A1 ES 247829A1 ES 0247829 A ES0247829 A ES 0247829A ES 247829 A ES247829 A ES 247829A ES 247829 A1 ES247829 A1 ES 247829A1
Authority
ES
Spain
Prior art keywords
benzyl
phenyl
methyl
formic acid
acid
Prior art date
1958-03-13
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
ES0247829A
Other languages
Spanish (es)
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.)
CH Boehringer Sohn AG and Co KG
Original Assignee
CH Boehringer Sohn AG and Co KG
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.)
1958-03-13
Filing date
1959-03-10
Publication date
1960-03-16
1959-03-10 Application filed by CH Boehringer Sohn AG and Co KG filed Critical CH Boehringer Sohn AG and Co KG
1960-03-16 Publication of ES247829A1 publication Critical patent/ES247829A1/en
Status Expired legal-status Critical Current
Links Classifications Landscapes Abstract

The invention comprises 2-phenyl-4-benzyl-, 2 - methyl - 3 - phenyl - 4 - benzyl -, 2 - (p - chlorophenyl) - 4 - benzyl -, 2 - phenyl - 3 - benzyl - 4 - methyl -, 2 - (5,6,7,8 - tetrahydronaphthyl - 2) - 3,4 - dimethyl -, and 2 - (m - hydroxyphenyl) - 3 - methyl -, 1,4 - oxazines, 2 - (p - methoxyphenyl) - 3 - methylmorpholine and their acid addition salts. In general tetrahydro-1,4-oxazines of the general formula <FORM:0862198/IV (b)/1> are produced by heating an a -(ethanolamino)-ketone of general formula <FORM:0862198/IV (b)/2> or a salt thereof with formic acid or a compound yielding formic acid under the reaction conditions, R1 being alkyl, aryl or aralkyl and R2, R3, R4 and R5 representing hydrogen or alkyl, aryl or aralkyl residues, and in which R1, R2, R3, R4 and R5 may be the same or different and may be substituted. The process is particularly useful for the production of those compounds in which R1 is a methyl, phenyl, chlorophenyl, methoxyphenyl, hydroxyphenyl or tetrahydronaphthyl radical and R2, R3, R4 and R5 are hydrogen atoms or methyl, phenyl or benzyl radicals. Substances yielding formic acid under the reaction conditions are, for example, formamide or dimethylformamide. The process may be carried out in a solvent medium, e.g. 70-100% aqueous formic acid an amide such as acetamide, dimethylformamide or dimethylacetamide a urea derivative such as N,N1-dimethylurea or an amine such as aniline, dimethylaniline, benzylamine or pyridine. The preferred temperature range for the process is 130-140 DEG C. It is advantageous to add an esterification catalyst such as, for example, perchloric acid, trichloracetic acid, p-toluene sulphonic acid, strongly acidic ion-exchangers, zinc chloride or boron trifluoride. If in the product R3 is a benzyl group or if any of the groups R2, R4 or R5 is a benzyloxy-phenyl residue these may be catalytically hydrogenated to replace the benzyl groups by hydrogen. Specification 791,416 is referred to.

ES0247829A 1958-03-13 1959-03-10 Improvements in or relating to the production of substituted tetrahydro-1,4-oxazines Expired ES247829A1 (en) Applications Claiming Priority (1) Application Number Priority Date Filing Date Title DE862198X 1958-03-13 Publications (1) Publication Number Publication Date ES247829A1 true ES247829A1 (en) 1960-03-16 Family ID=6797453 Family Applications (1) Application Number Title Priority Date Filing Date ES0247829A Expired ES247829A1 (en) 1958-03-13 1959-03-10 Improvements in or relating to the production of substituted tetrahydro-1,4-oxazines Country Status (2) Families Citing this family (2) * Cited by examiner, † Cited by third party Publication number Priority date Publication date Assignee Title WO2011146821A2 (en) 2010-05-21 2011-11-24 Research Triangle Institute 1 - phenylmorpholine derivatives as hydroxybupropion analogues for treating drug dependence ES2687095T3 (en) * 2010-05-21 2018-10-23 Research Triangle Institute Phenylimorpholins and analogues thereof Also Published As Similar Documents Publication Publication Date Title ES247829A1 (en) 1960-03-16 Improvements in or relating to the production of substituted tetrahydro-1,4-oxazines US3167561A (en) 1965-01-26 2, 5-diazabicyclo-[2,2,1]heptanes and [2,2,2]octanes GB1111507A (en) 1968-05-01 Substituted amino pyridines GB1024816A (en) 1966-04-06 Basic ethers of substituted hydroxy benzoic acids and process for making same ES2017950B3 (en) 1991-03-16 NEW CHEMICAL PROCEDURE FOR THE OBTAINING OF OXAMIDE DERIVATIVES AND COMPOUNDS OBTAINED THROUGH THE SAME. GB860423A (en) 1961-02-08 Production of compounds of the pyrimidine series US3883532A (en) 1975-05-13 2-Substituted -4,5-diamino-6-cyanopyrimidines US2617808A (en) 1952-11-11 4-thiazolidone-2-n-caproates and preparation thereof US3398155A (en) 1968-08-20 2, 6-dichloro-isonicotinamide derivatives and a method for their preparation US3244723A (en) 1966-04-05 Certain 4-aminothiazole compounds and their preparation US3671535A (en) 1972-06-20 4-imino-oxazolidin-2-ones and process of preparation US3029241A (en) 1962-04-10 Phenylpbperazinylacyl anilines GB1001094A (en) 1965-08-11 Improvements in or relating to the production of n-(3-hydroxy-alkyl)-3,4,5-trimethoxybenzoic acid amides US3291827A (en) 1966-12-13 Process for preparing n, n&#39;-dicyanoamidine salts US4292446A (en) 1981-09-29 Aniline derivatives GB1570591A (en) 1980-07-02 Process for preparing n-methylolated amides and ethers thereof US3247219A (en) 1966-04-19 3&#39;-nitro-2-oxo-3-oxazolidine carboxanilide US2915525A (en) 1959-12-01 Preparation of arylenebenzoxazolols and arylenebenzothiazolols Baumgarten et al. 1967 Reactions of amines. XVI. 1-t-Butyl-3, 3-diphenylaziridinone GB765544A (en) 1957-01-09 Production of amides and ketones having basic substituents GB840361A (en) 1960-07-06 New morpholinoacyl anilides and methods for their preparation Gilligan 1971 Synthesis of N, N-bis (2-fluoro-2, 2-dinitroethyl)-N-alkylamines ATE2528T1 (en) 1983-03-15 PHTHALIDISOCHINOLINE DERIVATIVES, THEIR PRODUCTION AND USE IN PHARMACEUTICALS. GB1367163A (en) 1974-09-18 Boron compounds GB1379428A (en) 1975-01-02 Unsaturated amides containing tertiary amino groups

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