US3055906A - Pyridylethylated d-alpha-methylphenethylamines - Google Patents

Pyridylethylated d-alpha-methylphenethylamines Download PDF

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US3055906A
US3055906A US63462A US6346260A US3055906A US 3055906 A US3055906 A US 3055906A US 63462 A US63462 A US 63462A US 6346260 A US6346260 A US 6346260A US 3055906 A US3055906 A US 3055906A
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pyridylethylated
methylphenethylamines
pyridyl
alpha
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US63462A
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Seymour L Shapiro
Freedman Louis
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US Vitamin and Pharmaceutical Corp
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US Vitamin and Pharmaceutical Corp
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D213/00Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/24Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with substituted hydrocarbon radicals attached to ring carbon atoms
    • C07D213/36Radicals substituted by singly-bound nitrogen atoms
    • C07D213/40Acylated substituent nitrogen atom
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D213/00Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/24Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with substituted hydrocarbon radicals attached to ring carbon atoms
    • C07D213/36Radicals substituted by singly-bound nitrogen atoms
    • C07D213/38Radicals substituted by singly-bound nitrogen atoms having only hydrogen or hydrocarbon radicals attached to the substituent nitrogen atom

Definitions

  • p and said substituted phenyl is selected from consisting of lower alkoxylphenyl and 3,4,5-t-rimethoxy.
  • This invention is concerned with pyridylethylated d-u-methylphenethylamines and derivatives thereof which are effective agents in modifying central nervous system activity.
  • the invention is concerned with pyridylethylated d-wmethylphenethylamines of the structure shown vinylpyridine being derived from the group consisting of 2- and 4-vinylpyridine and the ring alkylated derivatives of 2- and 4-vinylpyridines.
  • the most eflicient procedure has proven to be the acetic acid catalyzed condensation as described by Reich and Levine, J. Am. Chem. Soc., 77: 5434 (1955).
  • the amines are secondary amines and can be readily converted to their monoand dihydrochlorides and similar acid salts.
  • the secondary amine is readily acylated or aroylated upon treatment with acid chlorides of the type RCOCI wherein R has the significance described above.
  • acylated and aroylated derivatives upon treatment with mineral acids give the corresponding acid salts and upon treatment with lower alkyl halides or sulfates afford the corresponding quaternary ammonium salts.
  • R is lower alkyl, phenyl and substituted phenyl the group and 4-pyridyl e compounds of this invention on testing show diverse yet unambiguous response in their effect on the central nervous system in that they either promote central nervous system activity or significantly depress such activity.
  • pyridylethylated d-a-methylphenethylamines of this invention are conveniently prepared by condensation of d-a-methylphenethylamine with a vinylpyridine, said by Weller and Strauss, Oxford, England.
  • Example I N-d-a-methylphenethyl 2-(5 ethyl 2 pyridyl)ethylamine (Compound 9).
  • a mixture of one-third mole each of d-a-methylphenethylamine, Z-Vinyl 5 ethylpyridine, and acetic acid in ml. of methanol was heated under reflux for 8 hours and distilled. After removal of low boiling fractions, a forerun was collected at l28-l40 (0.3 mm), and the product (41.5 g.) was obtained, B.P. 148-l50 (0.4 mm.). The forerun, upon trituration with hexane, gave 2.4 g. (4.1% M.P. l26127, not depressing the melting point of authentic d-a-methylphenethylacetamide.
  • Example I Acetamide of Compound 1 (Compound 2) .A mixture of 9.6 g. (0.04 mole) of Compound 1 and 10 ml. of acetic anhydride was heated under reflux for 1 hour. When cool, after addition of ml. of water, and basification, the formed oil was extracted with 100 ml. of benzene and the product was obtained by distillation, 9.77 g. (87%), B.P. 179 (0.16 mm).
  • Example 111 3,4,5-trimethoxybenzamide of Compound 1 (Compound 6) .-A solution of 9.6 g. (0.04 mole) of compound 1 in 35 ml. of benzene was added dropwise under stirring over 1 hour to a solution of 4.6 g. (0.02 mole) of 3,4,5- trimethoxybenzoyl chloride in 65 ml. of benzene while maintaining the temperature at 25-30". When addition was complete, the reaction mixture was heated under reflux for 1 hour and then stored at 20 for 24 hours. After extraction with dilute hydrochloric acid, and basification, 8.6 g. (98%) of product was separated and recrystallized.

Description

p and said substituted phenyl is selected from consisting of lower alkoxylphenyl and 3,4,5-t-rimethoxy.
3,055,906 Patented Sept. 25, 1962 This invention is concerned with pyridylethylated d-u-methylphenethylamines and derivatives thereof which are effective agents in modifying central nervous system activity. 'In particular, the invention is concerned with pyridylethylated d-wmethylphenethylamines of the structure shown vinylpyridine being derived from the group consisting of 2- and 4-vinylpyridine and the ring alkylated derivatives of 2- and 4-vinylpyridines. The most eflicient procedure has proven to be the acetic acid catalyzed condensation as described by Reich and Levine, J. Am. Chem. Soc., 77: 5434 (1955).
After a suitable reaction period under reflux, the products are collected by fractional distillation. The amines are secondary amines and can be readily converted to their monoand dihydrochlorides and similar acid salts.
In turn, the secondary amine is readily acylated or aroylated upon treatment with acid chlorides of the type RCOCI wherein R has the significance described above.
The acylated and aroylated derivatives upon treatment with mineral acids give the corresponding acid salts and upon treatment with lower alkyl halides or sulfates afford the corresponding quaternary ammonium salts.
Typical compounds representing the structural ambit of this invention are described in the table below:
TABLE Analyses Yield, N o. R M.P. n or per- Formula Carbon, per- Hydrogen, per- Nitrogen, per- B.P., 0 cent cent cent cent Calcd. Found Calcd Found Calcd. Found 120 (0.05) E 66 C1eH2oN'2 80. 0 80. 1 8. 4 8. 2 11.7 12.0 170-179 (0.16) 87 ClsH22N.0 9. 9 10. 1 151-152 85 CreHzsINzO--. 53. 8 54. 0 5. 9 6. 0 6. 6 6. 8 p-OH3OCeH C O 238-242 (0.03)-- 39 Cz4H2uN202 77.0 77.0 7 0 6. 7 7. 5 7.0 o-C2H OOaH4CO.. 226-229 (0.03).- 47 OH28N202--- 7. 2 6. 8 Il\ IB 117-118 58 CzcHaoNzO-i. 71. 9 71.7 7.0 7. 2 6. 5 6.0 128-134 (0.08) E 53 CrsHzuNz 80.0 79. 5 8. 4 8. 4 11. 7 11. 7 103-106 Ob 57 Cz5HzaN2Oz 77.3 77.4 7. 3 7.1 7.2 6.9 148-150 (0.4) E 01s 24N2 80. 6 80. 7 9. 0 9. 1 l0. 4 9. 8
B Py=2-pyridyl unless otherwise indicated; b Melting points are not corrected and were 1w Py=4-pyridyl; Py=6-ethyl-2-pyridyl. established on a Fisher-Johns melting point block.
Recrystallizing solvent; M ethyl acetate; vb hexane-benzene. d Yields are expressed as recrystallized or distilled product.
8 Analyses are 1 Compound is s [111 in methanol; compound 11 TMB=3,4,5-tri.methoxybenzo methiodide of compound 2.
l @om-on-g-nm-om-m wherein R is lower alkyl, phenyl and substituted phenyl the group and 4-pyridyl e compounds of this invention on testing show diverse yet unambiguous response in their effect on the central nervous system in that they either promote central nervous system activity or significantly depress such activity.
While the exact mechanism of the pharmacological response to the compounds of this invention is as yet unknown, it would appear that they act and mediate central nervous system responses which, depending on the structure of the compound involved, are observable as a depressant or analeptic pharmacological response.
The pyridylethylated d-a-methylphenethylamines of this invention are conveniently prepared by condensation of d-a-methylphenethylamine with a vinylpyridine, said by Weller and Strauss, Oxford, England.
1, +21.40; compound 7, +2430; compound 9, +2230.
The invention will be further illustrated by description in connection with the following specific examples showing the preparation of compounds of the invention.
Example I N-d-a-methylphenethyl 2-(5 ethyl 2 pyridyl)ethylamine (Compound 9). A mixture of one-third mole each of d-a-methylphenethylamine, Z-Vinyl 5 ethylpyridine, and acetic acid in ml. of methanol was heated under reflux for 8 hours and distilled. After removal of low boiling fractions, a forerun was collected at l28-l40 (0.3 mm), and the product (41.5 g.) was obtained, B.P. 148-l50 (0.4 mm.). The forerun, upon trituration with hexane, gave 2.4 g. (4.1% M.P. l26127, not depressing the melting point of authentic d-a-methylphenethylacetamide.
Compounds 1 and 7 were similarly prepared.
Example I] Acetamide of Compound 1 (Compound 2) .A mixture of 9.6 g. (0.04 mole) of Compound 1 and 10 ml. of acetic anhydride was heated under reflux for 1 hour. When cool, after addition of ml. of water, and basification, the formed oil was extracted with 100 ml. of benzene and the product was obtained by distillation, 9.77 g. (87%), B.P. 179 (0.16 mm).
A solution of 2.8 g. (0.01 mole) of the compound in 25 ml. of acetonitrile and 2 ml. of methyl iodide was refluxed for 2 hours, and upon cooling, yielded 3.6 g. (85%) of the methiodide (Compound 3). Attempted hydrogenation with rhodium on carbon afforded only unconverted reactant.
Example 111 3,4,5-trimethoxybenzamide of Compound 1 (Compound 6) .-A solution of 9.6 g. (0.04 mole) of compound 1 in 35 ml. of benzene was added dropwise under stirring over 1 hour to a solution of 4.6 g. (0.02 mole) of 3,4,5- trimethoxybenzoyl chloride in 65 ml. of benzene while maintaining the temperature at 25-30". When addition was complete, the reaction mixture was heated under reflux for 1 hour and then stored at 20 for 24 hours. After extraction with dilute hydrochloric acid, and basification, 8.6 g. (98%) of product was separated and recrystallized.
It is to be noted that it is intended to cover all changes and modifications of the examples of the invention herein chosen for the purpose of illustration which do not constitute departures from the spirit and scope of the invention.
We claim:
1. The amide of the structure wherein Py is selected from the group consisting of 2- .pyridyl, 4-pyridyl, and 2-pyridyl-5-ethyl and R is selected from the group consisting of lower alkyl, phenyl, lower alkoxyphenyl, and 3,4,5-trimethoxyphenyl.
2. The compound of the formula 4. The compound of the formula N @om-thn-nuom-cmonto -00H3 I OCH! References Cited in the file of this patent UNITED STATES PATENTS 2,792,403 Blicke May 14, 1957 2,843,594 Leditschke et al. July 15, 1958 2,870,156 Perron et al. Jan. 20, 1959 OTHER REFERENCES Noller: The Chemistry of Organic Compounds, 2nd
Ed., page 244 (Saunders) (1957).

Claims (1)

1. THE AMIDE OF THE STRUCTURE
US63462A 1960-10-19 1960-10-19 Pyridylethylated d-alpha-methylphenethylamines Expired - Lifetime US3055906A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3133077A (en) * 1964-05-12 Z-pysudyl-alkylamines and their lower
US4358446A (en) * 1979-07-19 1982-11-09 Shell Oil Company Use as fungicides of N-(3-pyridylmethyl)-N-acyl anilines
US4501746A (en) * 1981-12-18 1985-02-26 Eli Lilly And Company N,N-disubstituted carboxamide derivatives, and fungicidal use thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2792403A (en) * 1955-01-05 1957-05-14 Univ Michigan 2-pyridylethyl-phenylethylalkylamines
US2843594A (en) * 1958-07-15 Substituted isonicotinic acid amides
US2870156A (en) * 1958-03-03 1959-01-20 Bristol Lab Inc N-pyridylethyl-3, 4, 5 trimethoxybenzamide

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2843594A (en) * 1958-07-15 Substituted isonicotinic acid amides
US2792403A (en) * 1955-01-05 1957-05-14 Univ Michigan 2-pyridylethyl-phenylethylalkylamines
US2870156A (en) * 1958-03-03 1959-01-20 Bristol Lab Inc N-pyridylethyl-3, 4, 5 trimethoxybenzamide

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3133077A (en) * 1964-05-12 Z-pysudyl-alkylamines and their lower
US4358446A (en) * 1979-07-19 1982-11-09 Shell Oil Company Use as fungicides of N-(3-pyridylmethyl)-N-acyl anilines
US4501746A (en) * 1981-12-18 1985-02-26 Eli Lilly And Company N,N-disubstituted carboxamide derivatives, and fungicidal use thereof

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