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United States Patent Office Patented Oct 3,845,124 United States Patent Office Patented Oct. 29, 1974 2 with a pharmacologically acceptable carrier, the propor 3,845,124 tion of these agents are determined by their solubility METHYLTRICYCLO4.4.0.03.8DECAN. and chosen route of administration. For example the 1-METHYLAMINE agents may be administered orally in solid form contain Pierre Deslongchamps, Sherbrooke, Quebec, Canada, as ing such excipients as starch, milk sugar, certain types of signors to Ayerst, McKenna & Harrison, Limited, St. clay and so forth. Also they may be administered orally NoLaurent, Drawing. Quebec, Continuation-in-part Canada of application Ser. No. in the form of solutions or they may be injected paren 743,623, July 10, 1968, now Patent No. 3,579,567. terally. For parenteral administration they may be used This application Jan. 27, 1969, Ser. No. 794,422 in the form of a sterile solution containing other solutes, Int, C, COTc 87/40 10 for example, enough saline or glucose to make the solu U.S. C. 260-563 P 3 Claims tion isotonic. The dosage of the present therapeutic agent will vary with the form of administration. Furthermore, it will ABSTRACT OF THE DISCLOSURE vary with the particular host under treatment. Generally, There are disclosed herein tricyclo[4.4.0,088 decan-1- 5 treatment is initiated with small dosages substantially amine and o-methyltricyclo[4.4.0.03.8 decan - 1 - methyl less than the optimum dose of the compound. Thereafter, amine and the intermediates used in their preparation 8 the dosage is increased by small increments until the op hydroxytricyclo4.4.0.03.8) decan - 4 - one acetate, 8-hy timum effect under the circumstances is reached. In gen droxytricyclo[4.4.0.03.8 decan-4-one acetate thioketal, tri eral, tricyclic amines of this invention are most desirably cyclo4.4.0.03.8 decan-1-ol acetate, tricyclo[4.4.0.0.) 20 administered at a concentration level that will generally decan-1-ol, N-1-tricyclo[4.4.0.03.8 decanylacetamide, tri afford effective results without causing any harmful or cyclo4.4.0.03.8) decane - 1 - carboxylic acid, tricyclo deleterious side effects and preferably at a level that is in 4.4.0.03.8 decanylmethylketone and tricyclo[4.4.0.08. a range of from about 0.5 mg. to about 100 mg. per kilo decanylmethylketone oxime. The compounds possess anti per day, although as aforementioned variations will occur. viral properties, and methods for their use as well as proc 25 However, a dosage level that is in the range of from about esses for their preparation are also disclosed. 2 mg. to about 10 mg. per kilo per day is most satis factory. Such doses may be administered once or twice a day, as required. This application is a Continuation-in-part of my U.S. The tricyclic amines of this invention are prepared by Patent Application Ser. No. 743,623, filed July 10, 1968 30 processes illustrated by the following formulae: and now U.S. Pat. No. 3,579,567 (AHP-4827). This invention relates to the novel tricyclic amines tri cyclo4.4.0.03.8 decan - 1 - amine and ot-methyltricyclo O CH C. O 4.4.0.03.8 decan-1-methylamine, to intermediates used in N their syntheses and to processes for their preparation. w-rr- ermined Furthermore, this invention includes the non-toxic, pharmaceutically acceptable acid addition salts of tricyclo o- N/-0 -1 4.4.0.03.8 decan-1-amine and o-methyltricyclo[4.4.0.08:8 O decan-1-methylamine. Such salts are prepared from suit II. II able acids, such as inorganic acids, for instance, hydro 40 O O chloric, hydrobromic, sulfuric, phosphoric, or sulfamic acid; or organic acids, for instance, acetic, maleic, lactic, CH3 d O CH3 ( O ethanedisulfonic, glycolic, salicyclic and fumaric acids. The acid addition salts are prepared by reacting the tri - e-m- <> p-mind 45 cyclic amines of this invention with either one equivalent S of acid or preferably an excess in an organic solvent such S as ether or an ethanol-ether mixture. \ / CH Tricyclo4.4,0.03.8 decan-1-amine and cy-methyltricyclo W. CH W. 4.4.0.03.8 decan-1-methylamine, the tricyclic amines of O this invention, may be represented by the formula I, 50 <>O CH &NH<> WI. WII. E. in which Q represents the amino group -NH2 or the (oy-methyl) methylamino group -CH(CH3)NH2, respec tivley. g The tricyclic amines of this invention possesses useful 60 antivirial activity. This activity is readily demonstrated in BO Q > standard pharmaceutical tests, such as, for example, the tests described by R. C. Stewart in "Pharmacological VII. I (Q-NH2) Techniques in Drug Evaluation' by Year Book Medical Publishers, Inc., Volume 2, page 576. More specifically, the compound of this invention shows antivirial activity 65 ^ against certain strains of influenza, especially influenza NoH A and influenza A'. CH3 CH Q When the tricyclic amines of this invention are used as antiviral agents in warm-blooded mammals, for example, mice, they may be employed alone or in combination with 70 pharmacologically acceptable carriers. When employed 3,845,124 4 More specifically, for the preparation of tricyclo with petroleum ether and 25% petroleum ether in ben 4.4.0.03.8) decan-1-amine the process, zene. The combined eluates are evaporated to dryness. The residual colorless oil is crystallized from petroleum ether to afford the title compound (III) as colorless crys is used and for the preparation of O-methyltricyclo tals, m.p. 66-68 C. 4.4.0.03.8 decan-1-methylamine the process, EXAMPLE 2 8-Hydroxytricyclo4.4.0.03.8) decan-4-one acetate is used. thioketal (IV) For the two processes outlined above I prefer to use O Freshly distilled borontrifluoride-ether complex (50 as starting material the compound, decalin-2,7-dione of ml.) is added to a solution of 4 g. of 8-hydroxytricyclo 4.4.0.03.8 decan-4-one acetate (III) and 4.0 ml. of ethane formula II, described by A. G. Anderson and D. O. Bar dithiol in 300 ml. of glacial acetic acid. The mixture is low, J. Am. Chem. Soc. 77, 5165 (1955). Treatment of stirred at room temperature for 24 hours, diluted with the starting material (II) with a mixture of a lower alka 5 1.5 1. of water and extracted with ether (5x250 ml.). noic acid such as, acetic acid, a lower alkanoic anhydride, The ether extract is washed with dilute sodium carbonate, such as acetic anhydride, and boron trifluoride at room and then water, dried over magnesium sulfate, filtered and temperature affords the 8 - hydroxytricyclo[4.4.0.08 evaporated to dryness to afford the title compound, Suit decan-4-one acetate of formula III. The latter compound able for use in the following step (Example 3), as a crude is converted to its corresponding thioketal of formula IV 20 by treatment with ethane dithiol in a conventional man oil, The residual crude oil is crystallized from petroleum ner. Desulfurization of the thioketal IV with an excess of ether to yield the pure title compound (IV), m.p. 71 C. Raney nickel in boiling ethanol for two days yields tri EXAMPLE 3 cyclo4.4.0.03.8 decan-1-ol acetate of formula V. The lat Tricyclo[4.4.0.03.8 decan-1-ol acetate (V) ter compound is converted to its corresponding free hy 25 droxy derivative of formula VI, tricyclo4.4.0.03.8 decan A solution of crude 8-hydroxytricyclo4.4.0.03.8 decan 1-ol, preferably by reductive hydrolysis with lithium alu 4-one acetate thioketal (IV, 8.0 g.) in 400 ml. of absolute minum hydride; alternatively, hydrolysis with a dilute ethanol is treated with 7.0 g. of Raney nickel and boiled acid, such as, for example, dilute hydrochloric acid, or for 12 hours. During the time small portions of fresh with a dilute base, such as, for example, dilute sodium 30 Raney nickel are added at two hour intervals. The re carbonate, may be used to achieve this conversion. action mixture is cooled and filtered through Celite. The process for the preparation of tricyclo[4.4.0.03.8- Raney nickel (30 g.) is added to the filtered solution and decan-1-amine is completed as follows: treatment of tri the resultant mixture is boiled for 12 hours. The mixture cyclo[4.4.0.03.8 decan-1-ol (VI), described above, with is now cooled and filtered through Celite, diluted with acetonitrile and sulfuric acid readily affords N-1-tricyclo 35 water (3 1.) and extracted with pentane (4x250 ml.). 4.4.0.03.8 decanyl-acetamide of formula VII, which upon The pentene extract is dried over magnesium sulfate, fil hydrolysis, preferably by boiling with dilute sodium hy tered, and evaporated to dryness yielding the title com droxide in diethylene glycol, yields the tricyclic amine of pound (V) as a colourless oil, b.p. 80-82 C./0.4- this invention, tricyclo4.4.0.03.8 decan-1-amine, of for 0.5 mm. mula (Q=NH2). 40 EXAMPLE 4 For the preparation of the tricyclic amine of this inven tion, or-methyltricyclo4.4.0.03.8 decan-1-methylamine of Tricyclo[4.4.0.03.8 decan-1-ol (VI) formula I (Q=CH(CH3)NH2), tricyclo[4.4.0.03.8 decan A mixture of tricyclo4.4.0.038 decan-1-ol acetate (V, 1-ol (VI), described above, is treated with formic acid in 200 mg.) and lithium aluminum hydride (200 mg.) in the presence of a strong mineral acid, such as, for exam 25 ml.
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