TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred process: In the process (P1) first solution of unsaturated cinacalcet free base is prepared either by dissolving unsaturated cinacalcet free base in the solvent at 0 degrees C to the boiling temperature of the solvent; or by reacting 3-(trifluoromethyl)cinnamaldehyde with (R)-(+)-1-(1-naphthyl)ethyl amine or an acid addition salt in the presence of a reducing agent in a solvent to produce a reaction mass containing (R)- alpha -methyl-N-(3-(3-(trifluoromethyl)phenyl)propylene)-1-naphthalene methaneamine (unsaturated cinacalcet free base); subjecting the reaction mass to a filtration, a washing, an extraction, and/or an evaporations; and dissolving or extracting the unsaturated cinacalcet free base in the solvent at a temperature of 0 degrees C to the boiling temperature of the solvent; or by treating an acid addition salt of unsaturated cinacalcet with a base to produce unsaturated cinacalcet free base and dissolving or extracting the unsaturated cinacalcet free base in the solvent. The first solution obtained is optionally subjected to carbon treatment or silica gel treatment. The hydrochloric acid is in the form of a concentrated hydrochloric acid or an aqueous hydrochloric acid or in the form of hydrogen chloride gas or hydrogen chloride dissolved in an organic solvent; and the oxalic acid or the di-p-toluoyl-L-(+)-tartaric acid is used directly or in the form of a solution of oxalic acid or di-p-toluoyl-L-(+)-tartaric acid dissolved in a solvent selected from the group consisting of water, an ether, an alcohol, a ketone, a chlorinated hydrocarbon, a hydrocarbon, an ester, and/or a nitrile. The combining step is accomplished by adding the first solution to the acid or by adding the acid to the first solution. The reaction mass obtained after completion of the addition process is stirred at a temperature below 50 degrees C for at least 30 minutes to produce a second solution or suspension. The second solution or suspension obtained is optionally heated at 40-80 degrees C for at least 20 minutes. The isolation step is carried out by forcible or spontaneous crystallization, where the forcible crystallization is initiated by cooling, seeding, partial removal of the solvent from the solution, and/or by adding an anti-solvent to the solution. The crystallization is carried out by cooling the solution at 0-25 degrees C for 30 minutes to 20 hours. The recovering step is carried out by filtration, filtration under vacuum, decantation, centrifugation, and/or filtration employing a filtration media of a silica gel or celite. Preferred Components: The hydrogenation catalyst is selected from palladium hydroxide, palladium on carbon, platinum on carbon, platinum oxide, rhodium on carbon and rhodium on alumina. The hydrogenation catalyst is used in the ratio of 0.05-10 (preferably 0.5-2.5) (wt./wt.%) with respect to the unsaturated cinacalcet hydrochloride. The hydrogenation catalyst is used in a ratio of 0.5-2.5 (wt./wt.%) with respect to the compound (VI). The base is an organic or inorganic base; where the inorganic base is selected from sodium hydroxide, calcium hydroxide, magnesium hydroxide, potassium hydroxide, lithium hydroxide, sodium carbonate, potassium carbonate, lithium carbonate, sodium bicarbonate and potassium bicarbonate. The solid unsaturated cinacalcet salt is in a crystalline form, an amorphous form, anhydrous and/or solvent-free form or as a hydrate and/or a solvate. The solid unsaturated cinacalcet salt comprises the solid state form of unsaturated cinacalcet hydrochloride salt having a powder X-ray diffraction pattern or IR spectrum as given in the specification; the solid state form of unsaturated cinacalcet oxalate salt having a powder X-ray diffraction pattern or IR spectrum as given in the specification; and the solid state form of unsaturated cinacalcet di-p-toluoyl-L-(+)-tartrate salt having a powder X-ray diffraction pattern or IR spectrum as given in the specification. The solid state form of unsaturated cinacalcet salt has a purity of 99-99.95% as measured by HPLC.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The solvent is selected from water, methanol, ethanol, isopropyl alcohol, propanol, tert-butanol, n-butanol, acetone, methyl ethyl ketone, methyl isobutyl ketone, diethyl ketone, ethyl acetate, methyl acetate, isopropyl acetate, tert-butyl methyl acetate, ethyl formate, acetonitrile, tetrahydrofuran, dimethylformamide, dimethylsulfoxide, dioxane, and/or diethyl carbonate (preferably methanol, ethanol, isopropyl alcohol, and/or n-butanol). The first solvent (s1) is selected from water, tetrahydrofuran, dimethylformamide, and/or dimethylsulfoxide; and the second solvent (s2) is selected from water, methanol, ethanol, isopropyl alcohol, and/or n-butanol. The first solvent (s3) is selected from water, and/or ethyl acetate, the second solvent (s4) is selected from water, and/or tetrahydrofuran, the third solvent (s5) is selected from methanol, and/or n-butanol, and the fourth solvent (s6) is selected from water, methanol, and/or n-butanol. The organic base is selected from triethyl amine, tributylamine, diisopropylethylamine, diethylamine, tert-butyl amine, N-methylmorpholine, pyridine and 4-(N,N-dimethylamino)pyridine. The nitrogen protecting agent is an amine protecting agent selected from acid anhydride, mixed anhydride, acid chloride, alkyl halide, aralkyl halide and silyl compound (preferably di-tert-butyl-dicarbonate). The nitrogen protecting agent is used in a molar ratio of 1-5 moles with respect to 1 mole of the cinacalcet free base. The hydrochloric acid is in the form of concentrated hydrochloric acid or aqueous hydrochloric acid or in the form of hydrogen chloride gas or hydrogen chloride dissolved in an organic solvent. The nitrogen protecting agent is used in a molar ratio of 1-5 moles per 1 mole of (R)- alpha -methyl-N-(3-(3-(trifluoromethyl)phenyl)propylene)-1-naphthalene methaneamine (V). The solvent (s7) is selected from water, methyl tert-butyl ether, diethyl ether, diisopropyl ether, monoglyme, diglyme, tetrahydrofuran, dioxane, methanol, ethanol, n-propanol, isopropyl alcohol, isobutanol, n-butanol, tert-butanol, amyl alcohol, isoamyl alcohol, acetone, methyl ethyl ketone, methyl isobutyl ketone, methyl tert-butyl ketone, ethyl acetate, methyl acetate, isopropyl acetate, tert-butyl methyl acetate, ethyl formate, methylene chloride, ethylene dichloride, n-pentane, n-hexane, n-heptane and their isomers, cyclohexane, toluene, xylene, and/or acetonitrile (preferably water, methanol, ethanol, isopropyl alcohol, and/or acetonitrile). Preferred Definitions:    P1=acetyl, pyrrolidinylmethyl, cumyl, benzhydryl, trityl, benzyloxycarbonyl (Cbz), 9-fluorenylmethyloxy carbonyl (Fmoc), benzyloxymethyl (BOM), pivaloyloxymethyl (POM), trichloroethxoycarbonyl(Troc), 1-adamantyloxycarbonyl (Adoc), allyl, allyloxycarbonyl, trimethylsilyl, tert- butyldimethylsilyl, triethylsilyl (TES), triisopropylsilyl, trimethylsilylethoxymethyl(SEM), t-butoxycarbonyl (BOC), t-butyl, 1 -methyl- 1,1-dimethylbenzyl or pivaloyl.    ACTIVITY - Endocrine-Gen.; Antithyroid; Cardiovascular-Gen.; CNS-Gen.; Gastrointestinal-Gen; Calcium antagonist. No biological data is given.    MECHANISM OF ACTION - None given.    SPECIFIC COMPOUNDS - Tert-butoxycarbonyl (BOC) protected cinacalcet of formula (IVa) is specified as compound (IV). Tert-butoxycarbonyl (BOC) protected unsaturated cinacalcet of formula (VIa) is specified as compound (VI).    EXAMPLE - Unsaturated cinacalcet hydrochloride salt (19 g) was dissolved in n-butanol (1000 ml) and hydrogenated with 20% wet palladium hydroxide (0.25 g) at 1.5 Kg/Cm2 for 3 hours at 5-10 degrees C. The catalyst was removed by filtration and the solvent was stripped off below 70 degrees C under vacuum. The resulting crude product was dissolved in n-butanol (70 ml) and heated to 70 degrees C to obtain clear solution. The resulting solution was cooled to 0-5 degrees C and maintained for 1 hour. The isolated compound was filtered, washed with chilled n-butanol and then dried at 70 degrees C under vacuum to give cinacalcet hydrochloride (10 g; purity 99.5%).