EP1000026A1

EP1000026A1 - Special 3-azabicyclo 3.1.0]hexanes, method for producing and modifying the same, and their use

Info

Publication number: EP1000026A1
Application number: EP98937579A
Authority: EP
Inventors: Elmar Vilsmaier; Torsten Goerz; Gunther Milch; Uwe Petersen; Axel Dalhoff; Gabriele Schmuck
Original assignee: Bayer AG
Current assignee: Bayer AG
Priority date: 1997-08-02
Filing date: 1998-07-21
Publication date: 2000-05-17
Also published as: KR20010022512A; WO1999006368A1; CA2298509A1; IL134058A0; DE19733439A1; US6310216B1; HUP0002895A3; JP2001512101A; HUP0002895A2; CN1265650A; AU8632198A; PL338349A1

Abstract

The invention relates to novel 3-azabicyclo[3.1.0]hexanes with a doubly protected amino group in position 6, and to a method for producing the same from chloramines or bicyclic N,O acetals or bicyclic nitriles. The two protective groups on the amino group in 6 and the group on N(3) can be specifically removed. The novel 3-azabicyclo[3.1.0]hexanes with a doubly protected amino group in position 6 are suitable for manufacturing pharmaceutical products, e.g. gyrase inhibitors, which can be modified by subsequently splitting off the protective groups.

Description

Special 3-Azabicvclof3.1.0] hexanes, process for their preparation and modification and their use

The present invention initially relates to 3-azabicyclo [3. l.OJhexane with a two

Protective group-bearing amino function in the 6-position. The present invention furthermore relates to processes for the preparation of these compounds starting from chlororenamines or bicyclic nitriles and to modification by customary deprotection. Finally, the present invention relates to the use of the new aminoazabicyclohexanes for the preparation of quinolones and

Naphthyridinecarboxylic acid derivatives such as 7- (6-amino-3-azabicyclo [3.1.0] hexyl) -6-fluoro-1 - (2,4-difluorophenyl) - 1,4-dihydro-4-oxo-1,8- naphthyridine-3-carboxylic acid and its salts and, if appropriate, a subsequent modification by deprotection.

It is known that 6-amino-3-azabicyclo [3.1.0] hexane is used as the diamine component for the production of gyrase inhibitors (see WO 91/02526, US Pat. No. 5,164,402, EP-A 413 455, Synlett 1996, 1097. US-A 5 298 629, WO 93/18001 and Synlett 1996. 1100). The more accessible 6-exo amine is preferably used.

In the previous syntheses of 6-exo- or 6-endo-amino-3-azabicyclo [3.1.0] hexane, the 6-amino group is always generated after the cyclopropanation step by converting a functional group. In each case, compounds with mono-protected 6-amino groups are used.

In the invention presented below, the amino group is already present in the molecule in the cyclopropanation step. However, the amino group is initially protected by two protective groups such as. B. protected benzyl or allyl residues, which can be split off later or after incorporation of the new aminoazabicyclohexanes in quinolone or naphthyridine carboxylic acid derivatives. In spite of the contradictory opinion expressed in the literature (see Synlett 1996, 1100), this path has proven to be a practical approach to 6-amino-3-azabicyclo [3.1.0] hexane derivatives with a free amino group in the 6-position. Chlorenamines or bicyclic nitriles which can be prepared therefrom are chosen as starting materials in the new processes. Chlororenamines only provide the 6-endo-amino-3-azabicyclo [3.1.0] hexanes, and from the bicyclic nitriles both 6-endo- and 6-exo-amino-3-azabicyclo [3.1.0] hexanes are accessible .

The present invention relates to new 6-amino-3-azabicyclo [3.1.0] hexanes of the formula

in the

R ¹ and R ² independently of one another for C ₃ -C 4 alkenyl or Ar-CH (R ') - with R' = hydrogen or C 1 -C 4 -alkyl and Ar = optionally substituted C ₆ -Cιo-aryl and

R ³ for hydrogen, C ₃ -C ₄ alkenyl, Ar-CH (R ') - with R' = hydrogen or C, -C ₄ - alkyl and Ar = optionally substituted C ₆ -Cιo-aryl or COOR ⁴ with R ⁴ = -C-alkyl or C ₂ -C ₄ alkenyl.

R 'is preferably hydrogen.

Optionally substituted C ₆ -C 10 -aryl can be, for example, C ₆ -C 10 -aryl which is unsubstituted or substituted by 1 to 3 identical or different substituents. Examples of substituents are C 1 -C 4 -alkyl and C.

C -alkoxy in question. In preferred compounds of formula (I), R ¹ and R ^{2 are the} same and stand for allyl or benzyl and R ³ stands for hydrogen, allyl, benzyl, COOCH ₃ or COOCH = € H ₂ .

There are two stereoisomers of the compounds of formula (I) mentioned

Formulas

and

which are identified in the following as endo- (I) or exo- (I) if a more precise description is required. R ¹ , R ² and R ³ in the formulas endo- (I) and exo- (I) correspond to the radicals given for formula (I).

The present invention further relates to a process for the preparation of compounds of the formula endo- (I), which is characterized in that a

Chlorenamine of the formula

in the

R ¹ and R ^{2 are the} same and represent C ₃ -C ₄ alkenyl or Ar-CH (R ') - with R' = hydrogen or C ₁ -C ₄ -alkyl and Ar = optionally substituted C ₆ -Cιo-aryl and

R ^{3 has} the same scope as R ¹ and R ² , but can be different from R ¹ and R ² ,

reacted with a C 1 -C 8 -alkanolate, thus obtaining an N, O-acetal of the formula (III)

in the

R ¹ , R ² and R ^{3 have} the meaning given for formula (II),

this treated with a hydride transfer agent and thus an amine of the formula

receives in the

R ¹ , R ² and R ^{3 have} the meaning given above for formula (II).

This method of the present invention is distinguished by a very high stereoselectivity. The cyclopropane formation from the chlororenamines of the formula (II) and the subsequent substitution in the N, O-acetals of the formula (III), which have a tertiary acetal amine unit, always lead to endo-amine derivatives of the formula endo- (I).

Chlorenamines of the formula (II) are accessible in a known manner or analogously thereto, for example by reacting 1- [C -C ₄ -alkenyl- or Ar-CH (R ') - with R' = hydrogen or -CC-alkyl and Ar = optionally substituted C6-Cιo-aryl] -4-di- [C ₃ -C ₄ -alkenyl- or Ar-CH (R ') - with R' = hydrogen or Cι-C alkyl and Ar = optionally substituted C ₆ -Cιo-aryl-] amino-l, 2,5,6-tetrahydropyridine with N-

Chlorosuccinimide (see Tetrahedron 5_i, 3507 (1995)).

The substituted 4-aminotetrahydropyridine used can preferably be 1-benzyl-4-dibenzylamino-1, 2,5,6-tetrahydropyridine and 1-benzyl-4-diallylamino-1, 2, 5, 6-tetra-hydropyridine. The reaction mixture obtained in the chlorination can also be used as such, i.e. can be used without isolating the chlororenamine of the formula (II).

The -CC alkyl alcoholates are generally used together with a solvent, preferably in an alcoholic solution, for example dissolved in the alcohol which corresponds to the respective alcoholate residue. The system is preferably sodium methanolate / methanol, which can be easily produced from elemental sodium and excess methanol. Preferably a two to four fold molar excess of alcoholate is used with respect to the chlororenamine. The reaction often proceeds at room temperature at a sufficient rate. It can be accelerated by heating to 50 to 60 ° C, for example.

After completion of the reaction with the -C ₄ alkyl alcoholate, the N, O-acetal of the formula (III) obtained can be isolated and purified by, for example, first stripping off the solvent and extracting the remaining residue with a solvent, for example a hydrocarbon and the N, O-acetal of the formula (III) is obtained from the extract, for example by crystallization or distillation in vacuo.

In particular, when reacting a chlororenamine of formula (II) with a d-alkyl alcoholate, the chlororenamine of formula (II) as a powder

Solution of a -C -C alkyl alcoholate added in a -C -C alkyl alcohol, you only get the 6-endo-amine isomer of N, O-acetal [as shown in formula (III)].

As a hydride transfer agent for the exchange of the -CC alkoxy group in the N, 0-

Acetal of formula (III) against hydrogen come e.g. Hydrides in question such as lithium aluminum hydride or diisobutyl aluminum hydride. Suitable solvents for this exchange reaction are, for example, ethers, preference is given to tetrahydrofuran. N, O-acetals of formula (III) and hydride transfer agents can e.g. be used in a molar ratio of 1: 1.2 to 1: 4. The reaction is preferred in one

Temperature range of e.g. 50 to 70 ° C performed. It is then generally finished within 3 to 5 hours.

The exchange reaction with the hydride transfer agent can e.g. carry out such that the hydride transfer agent is suspended in a suitable

Suspending agent submitted, added dropwise a solution of the N, O-acetal of formula (III), after the end of the reaction, the suspension and solvent that the The residue is hydrolyzed, the solid constituents of the mixture then present are separated off, the remaining aqueous phase is extracted and the amine of the formula endo- (I) is isolated from the extract.

This is preferably used as the solvent for the N, O-acetal of the formula (III)

Suspending agent for the hydride transfer agent. For alkaline hydrolysis e.g. an aqueous alkali hydroxide solution in question, wherein the reaction mixture can optionally be poured into aqueous mineral acid beforehand. The extraction of the aqueous phase can e.g. perform with ethers such as diethyl ether.

Suitable methods for isolating the amine of the formula endo- (I) are, for example, crystallization from a non-polar solvent such as pentane or distillation under reduced pressure.

The present invention also relates to a process for the preparation of compounds of the formula endo- (I), which is characterized in that a chlororenamine of the formula

in the

R ¹ and R ^{2 are the} same and represent Ar-CH (R ') - with R' = hydrogen or -CC ₄ -alkyl and Ar = optionally substituted Cβ-Cio-aryl and

R ^{3 has} the same scope as R ¹ and R ² , but can be different from R ¹ and R ² , reacted directly with a hydride transfer agent, the resulting primary product is subjected to acidic hydrolysis and the amine of the formula endo- (I) is liberated. This process also proceeds with high stereoselectivity to form the endo-amine isomers of the formula endo- (I).

This implementation can e.g. in acetonitrile or an acetonitrile-water mixture (e.g. 9: 1 to 2.5: 1) with heating to e.g. Carry out 40 to 70 ° C. As hydride transfer agents e.g. Complex hydrides resistant to water and acetonitrile are suitable. Sodium boron tetrahydride is preferred. Chlororenamine and hydride transfer agents can e.g. in a molar ratio of 1: 5 to 1:10. The amine adduct formed primarily is split by hydrolysis with acid, preferably hydrochloric acid. The amine of the formula endo- (I) is subsequently mixed with alkali, e.g. released by adding aqueous alkali such as dilute potassium hydroxide solution.

The present invention further relates to a process for the preparation of amines of the formula (I), which is characterized in that a bicyclic nitrile of the formula

in the

R and R ^{2 have} the meaning given for formula (I) and R ⁵ for hydrogen, CC ₆ alkyl, C ₃ -C ₄ alkenyl, Ar-CH (R ') - with R' = hydrogen or Cι-C ₄ alkyl and Ar = optionally substituted Cβ-Cio-aryl or COOR ⁴ with R ⁴ = -C ₄ alkyl or C ₂ -C ₄ alkenyl,

with an alkali metal in liquid ammonia, optionally in a mixture with a mono- or dialkylamine. The alkyl groups of these amines preferably contain 1 to 4 carbon atoms. Ethylamine is preferably used. This process can be used to stereoselectively prepare 6-amino-3-azabicyclo [3.1.0] hexane derivatives of the formulas endo- (I) and exo- (I)

in the

R ¹ and R ^{2 have} the meaning given for formula (I) and

R ³ for hydrogen, -CC ₆ -alkyl, C ₃ -C ₄ -alkenyl, Ar-CH (R ') - with R' = hydrogen or -CC ₄ -alkyl and Ar = optionally substituted C6-Cι ₀ - Aryl or COOR ⁴ with R ⁴ = -CC ₄ alkyl or C ₂ -C ₄ alkenyl.

Bicyclic nitriles of the formula (IV) are obtainable, for example, in accordance with tetrahedron 51 _^ 3507 (1995) from chlororenamines or analogously to the procedure described there. According to the invention, the nitrile group in the nitrile of the formula (IV) can be replaced by hydrogen with an alkali metal in liquid ammonia or in a mixture of ammonia and a mono- or dialkylamine, preferably ethylamine.

For the reaction, the nitrile and the alkali metal can be used in a molar ratio of e.g. 1: 3 to 1: 8 can be implemented. A ratio of 1: 5 to 1: 7 is preferred. Per mmol of nitrile of formula (IV) z. B. 15 to 100 ml, preferably 15 to 25 ml, ammonia or alkylamine-ammonia mixture can be used. The temperature used plays an important role in the stereochemical course of the reaction

Role. Carrying out the reaction at -70 ° C to -40 ° C causes a substitution with complete or almost complete retention of the configuration at C (6) to form the 6-endo amine isomer of the formula endo- (I). If, on the other hand, the analogous reaction of a nitrile of the formula (IV) with R ¹ = R ² benzyl and R ⁵ = hydrogen is carried out in a mixture of ethylamine and ammonia at ± 0 ° C. using sodium or, preferably, lithium as the alkali metal, this gives a stereoisomer mixture of amines of the formula exo- (I) and endo- (I) with R ¹ = R ² = benzyl and R ³ = hydrogen. The 6-exo-amine isomer of the formula exo- (I) mentioned is generally present in a proportion of (80 ± 10)%; it can be obtained as a pure compound by crystallization or other separation methods. It corresponds to a 3-azabicyclo [3.1.0] hexane with a protective group bearing an amine group in the 6-exo position; it is a derivative of

Diamine building block in the gyrase inhibitor described above.

The present invention further encompasses the modification of the bicycles of the formula obtained via chlororenamines of the formula (II) or from nitriles of the formula (IV)

where R ¹ , R ² and R ³ can have the meaning given in the formulas (II) and (IV), by customary splitting off of protective groups.

For the deprotection reaction from an amine of the formula (I) there are, for example, a hydrogenation treatment, a reaction with chloroformic acid C ₂ -C -alkenyl ester and subsequent acidic hydrolysis, a reaction with chloroformic acid CrC ₄ alkyl ester to give a urethane and its cleavage with halo-trialkylsilane or a deallylation with tetrakis (triaryl) phosphine palladium and a CH acid such as N, N'-dialkylbarbituric acid. The hydrating treatment can be done e.g. B. with hydrogen in the presence of a noble metal catalyst. Suitable catalysts are, for example, elemental palladium, in particular elemental palladium on a support such as carbon, aluminum oxide, silicon dioxide or silicates. The hydrogenating treatment can optionally be carried out in a solvent. Alcohols such as methanol are suitable for this purpose, to which tertiary amines such as triethylamine can optionally be added. The other reaction conditions for this hydrogenating treatment (for example pressure, temperature etc.) and for the work-up of the resulting reaction mixture can be selected as they are known from the prior art for such reactions. According to these methods, for example in the amine of the formula endo- (I) with R ¹ = R ² = R ³ = benzyl, all benzyl groups can be reductively removed by hydrogen. This creates an amine of the formula

H

in the

R ^{6 represents} hydrogen.

A selective removal of the N (3) -CH (R ') - Ar group in an amine of the formula (I) can be carried out, for example, by reaction with C ₂ -C -alkenyl chloroformate and subsequent acidic hydrolysis of the urethane formed. A benzyl group on Ν (3) in the amine and chloroformic acid vinyl ester are particularly suitable for this. This conversion to urethane is preferably carried out in a solvent. Examples are dichloromethane, chloroform and acetonitrile,

Chloroform is preferred. Chloroformic acid vinyl ester and amine can be used, for example, in a molar ratio of (1.1 to 1.2): 1. Reaction temperatures in A range of 40 to 60 ° C and reaction times of 1 to 3 hours generally lead to good results. The coproduct benzyl chloride can be separated off and the urethane can be purified by distillation in vacuo. Under the conditions described, dibenzylamine hydrochloride is formed as a by-product. The cleavage of the vinyloxycarbonyl group in the urethane z. B. with concentrated hydrochloric acid in chloroform, and working up with lye give the partially deprotected amine of formula (I). According to these methods, for example in an amine of the formula endo- (I), in which R ¹ = R ² = R ³ = benzyl, the benzyl radical R ^{3 can be} selectively replaced by hydrogen.

A selective removal of the N (3) -CH (R ') - Ar group in an amine of the formula (I) can also be carried out by reaction with C 1 -C 4 -chloroformate and subsequent reaction with a halotrialkylsilane. A benzyl group on N (3) in the amine and methyl chloroformate and the cleavage of the resulting urethane with trimethylsilyl iodide are particularly suitable for this. The conversion to the urethane is preferably carried out in a solvent. Examples are dichloromethane and chloroform mixed with pyridine. Chloroform / pyridine in the ratio (4 to 6): 1 is preferred. Chloroformic acid methyl ester and amine can e.g. in a molar ratio of (1.5 to 2): 1. Reaction temperatures in the range of 40 to 60 ° C and reaction times of 3 to 6 hours generally led. too good

Results. The coproduct benzyl chloride can be separated off and the urethane can be purified by distillation in vacuo. Under the conditions described, dibenzylamine hydrochloride is formed as a by-product. The methoxycarbonyl group in the urethane is split off with halotrialkylsilane, in particular trimethylsilyl iodide, preferably in a solvent such as

Chloroform at 40 to 70 ° C, preferably at 50 to 65 ° C. Halotrialkylsilane can e.g. be used in a 4 to 6-fold molar excess. I.a. the reaction is complete after 5 to 8 hours. It is then expedient to hydrolyze with acid. Good results are achieved with a methanolic hydrogen chloride solution. The amine of the formula (I) is then released by working up with alkali.

According to these methods, e.g. B. in an amine of the formula endo- (I), in which R ¹ = R ² = R ³ = benzyl, the benzyl radical R ^{3 are} selectively replaced by hydrogen. Alternatively, for example, the resulting urethane of the formula endo- (I) with R - R = benzyl and R ³ = COOCH _{3 can be} debenzylated to the amine of the formula (V) with R ⁶ = COOCH ₃ .

For the deallylylation, for example, the compound of the formula (I) with R ¹ and R ² = C ₃ -

C ₄ alkenyl with N, N'-dimethylbarbituric acid or a similar compound and tetrakis (triphenylphosphine) palladium or an analog derivative, preferably in a molar ratio of 1: (3 to 4): (0.01 to 0.05) . These molar ratios can also be chosen differently. Chlorinated hydrocarbons such as methylene chloride are suitable as solvents for this. For example, the

Diallyl compound of the formula endo- (I) with R ¹ = R ² = allyl and R ³ - benzyl in the presence of, for example, tetrakis (triphenylphosphine) palladium with N, N'-dimethyl barbituric acid to give the monobenzyl compound of the formula (V) with R ⁶ = Benzyl to be deallylated. The reaction is preferably carried out in dichloromethane at, for example, 30 to 40 ° C. The educt, N, N'-dimethylbarbituric acid and

Tetrakis (triphenylphosphine) palladium used, in a ratio of 1: (3.0 to 3.5): (0.01 to 0.03).

The configuration at C (6) of the 3-aza-bicyclo [3.1.0] hexane system is not changed in all reactions that remove benzyl or allyl protective groups.

The present invention also relates to the use of the new compounds of the formula (I) for the preparation of quinolone and naphthyridinecarboxylic acid derivatives with, if appropriate, subsequent modification of the 6-amino radical by deprotection. For example, 7- (6-endo-amino-3-azabicyclo [3.1.0] hex-3- yl) -6-fluoro-1 - (2,4-difluorophenyl) - 1,4-dihydro-4- oxo-1, 8-naphthyridine-3-carboxylic acid and its salts accessible. One can proceed according to the following formula scheme, for example.

Bn = benzyl Et = ethyl

The 7- (6-endo-amino-3-azabicyclo [3.1.0] hex-3-yl) -6-fluoro-l- (2,4-difluorophenyl) -l, 4-dihydro-4-oxo-l , 8-naphthyridine-3-carboxylic acid and its salts are distinguished from the corresponding 6-exo-amine isomers by a significantly lower neurotoxicity. According to the analogous formula scheme, the 7- (6-exo-amino-3-azabicyclo) can also be obtained from the new 6-exo-amine isomer of the formula exo- (I) with R ¹ = R ² = benzyl and R ³ = H [3.1. 0] hex-3 -yl) -6-fluoro-1 - (2,4-difluorophenyl) - 1, 4-dihydro-4-oxol, 8-naphthyridine-3-carboxylic acid and its salts. Examples

example 1

A solution of 4.14 g of N-chlorosuccinimide in 200 ml of dichloromethane was converted into a solution of 11.42 l of benzyl-4-dibenzylamino-1,2,5,6-tetrahydripyridine in 50 at -78 ° C. in the course of 2 hours ml of dichloromethane was added dropwise. The mixture was then stirred at -78 ° C for 1 hour. Then stirring was continued with slow warming to -30 ° C for 2 hours. After removing the solvent in a high vacuum, the residue was extracted five times with 150 ml of pentane. From the

The chlororenamine of the formula (II) with R ¹ = R ² = R ³ = benzyl precipitated out as a colorless powder at a low temperature in pentane solution. 10.9 g were obtained, which corresponds to a yield of 87% of theory. The melting point was 57 ° C.

1H-NMR spectrum: 2.67 ppm (H _B ι, 1H), 2.95 ppm (H _B2 , 1H), 3.08 ppm (H _AI , lH),

3.39 ppm (H _A2 , 1H), 4.68 ppm (H _X1 , Hx ,, 2H) (2 ABX systems), 3.52 ppm (H _B3 , 1H), 3.82 ppm (H _AS , 1H) (AB system), 4, 10 ppm (H _B4 , 2H), 4.43 ppm (H _A4 , 2H) (AB system), 7.15-7.45 ppm (m, 15H).

¹³ C-NMR spectrum: 141.1 (s), 138.7 (s), 137.6 (s), 128.9 (d), 128.3 (d), 128.2 (d),

127.3 (d), 127.0 (d), 126.8 (d), 101, 1 (d), 61.5 (t), 57.4 (t), 54.3 (d), 52 , 49 (t), 52.46 (t).

Example 2

4.5 ml of titanium tetrachloride mixed with 15 ml of toluene were added at 0 ° C. to a solution of 41.84 ml of diallylamine and 15 ml of N-benzylpiperidone in 200 ml of toluene. The mixture was stirred at 0 ° C for 1 hour and at 20 ° C for 20 hours. The solid residue was then suctioned off. The filtrate was obtained after evaporating the solvent in vacuo and distilling the residue in

Kugelrohr at 130-150 ° C / 1.3 ^'10 ^"3 mbar the corresponding enamine as a slightly yellow oil

(13.03 g) in 96% purity. To the solution of the oil isolated in this way in 20 ml of chloromethane, a solution of 6.22 g of N-chlorosuccinimide in 160 ml of dichloromethane was added dropwise at -78 ° C. with stirring over the course of 2 hours. The mixture is stirred for a further hour at -78 ° C and then with heating to -50 ° C for 4 hours. The solvent was then evaporated in vacuo and the residue extracted seven times with 50 ml each of pentane. 12.92 g of chlororenamine of the formula (II) with R ¹ = R ² = allyl and R ³ = benzyl with a melting point of 34 ° C. were obtained from the cooled pentane solution. This corresponds to a yield of 50% of theory, based on the N-benzylpiperidone used.

1H-NMR spectrum: 2.64 ppm (H _B ι, 1H), 2.94 ppm (H _B2 , 1H), 3.07 ppm (H _A1 , 1H),

3.44 ppm (H _A2 , 1H), 4.55 ppm (H _X1 , 1H), 4.62 (H, 1H) (2 ABX systems), 3.52 ppm (H _B3 , 1H), 3, 79 ppm (H _AS , 1H) (AB system), 3.58 ppm (H _γ , 2H), 3.78 ppm (Hχ3, 2H), 5.10 ppm (H _M , 1H), 5.13 ppm (H _N , 1H), 5.78 ppm (H _A , 1H) (AMNXY system), 7.22-7.43 ppm (m, 5H).

¹³ C-NMR spectrum: 140.5 (s), 137.5 (s), 134.7 (d), 128.6 (d), 127.9 (d), 126.8 (d), 116 , 1 (t), 99.3 (d), 61.3 (t), 57.2 (t), 54.0 (d), 52.4 (t), 51.0 (t).

Example 3

4.00 g of the chlororenamine obtained according to Example 2 was added to a solution of sodium methoxide in methanol which had been prepared from 0.91 g of sodium and 80 ml of methanol. The mixture was stirred for 3 days at 20 ° C, then the methanol was evaporated in vacuo. The residue was extracted with pentane and the extract in a Kugelrohr at 130 ° C / 1,3 ^'distilled mbar 10 ^"3. There were 3.35 g of the N, O acetal of formula (III) with R ¹ = R ² = Allyl , R ³ = benzyl and -CC ₄ -alkyl = methyl as a colorless oil, which corresponded to a yield of 85% of theory.

1H-NMR spectrum: 2.01 (H _XI , H _x > ι, 2H), 2.32 (H _A1 , H _A -ι, 2H), 3.07 (H _B1 , H _B -ι, 2H) (AA'BB'XX 'system), 3.29 (s, 3H), 3.58 (s, 2H), 3.50 (H _X2 , 4H), 5.14 (H _M , 1H),

5, 16 (H _N , 1H), 5.89 (H ^, 1H) (AMNX ₂ system), 7.22-7.31 (m, 5H). ¹³ C-NMR spectrum: 139.1 (s), 136.1 (d), 128.3 (d), 126.4 (d), 116.5 (t), 87.2 (s), 58 , 9 (t), 54.5 (q), 53.28 (t), 53, 18 (t), 33.7 (d).

Example 4

a) A solution of 1.77 g of N-chlorosuccinimide in 80 ml of dichloromethane was converted into a solution of 4.88 g of l-benzyl-4-dibenzylamino-l, 2,5,6- at -78 ° C within 2 hours. added tetrahydripyridine in 20 ml dichloromethane. The mixture was further stirred under slow warming to -50 ° C for a further 4 hours. Then the solvent was removed in vacuo. To the

A sodium methoxide solution prepared from 1.22 g of sodium and 100 ml of methanol was added to the residue. After stirring for 20 hours at room temperature, the solvent was removed under high vacuum. 4.17 g of N, O-acetals of the formula (III) with R ¹ = R ² = R ³ = benzyl and C, -C ₄ -alkyl = methyl were obtained from the residue by extraction with four times 40 ml each of pentane, the crystallized when stored in the freezer. The product had a melting point of 69 ° C and was obtained in a yield of 79% of theory.

b) 3.83 g of the chlororenamine obtained according to Example 1 were analogous to Example

3 and 3.59 g of the same N, O-acetal as in Example 4a were obtained. This corresponded to a yield of 95% of theory.

1H-NMR spectrum: 1.90 ppm (H _x , H _x> , 2H), 2.37 ppm (H _AI , H _AI , 2H), 2.71 ppm (H _B ι, H _B - _I , 2H ) (AA'BB'XX 'system), 3.33 ppm (s, 3H), 3.59 ppm (s, 2H), 3.93 ppm (H _B2 , 2H), 4.12 ppm (H ^ , 2H) (AB system), 7.19-7.29 ppm, 7.39-7.41 ppm (m, 15H).

¹³ C NMR spectrum: 139.1 (s), 138.5 (s), 129, l (d), 128.4 (d), 127.7 (d), 127.4 (d), 126 , 4 (d), 126.3 (d), 85.0 (s), 59.4 (t), 55.3 (t), 55.0 (q), 52.9 (t), 32, 7 (d). Example 5

a) A solution of 2.1 g of the N, O-acetal obtained according to Example 4 in 25 ml of tetrahydrofuran was slowly added dropwise to a suspension of 0.25 g of lithium aluminum hydride in 5 ml of tetrahydrofuran. The mixture was stirred at 60 ° C for 4 hours. The solvent was then removed in vacuo and the residue was carefully hydrolyzed with ice cooling by adding 30 ml of 2 molar aqueous potassium hydroxide solution. After the solid components had been centrifuged off, the aqueous phase was extracted four times with 20 ml of ether each time and the residue was extracted once with 20 ml of diethyl ether.

After removing the solvent and crystallizing from pentane, 1.65 g of an amine of the formula endo- (I) with R ¹ = R ² = R ³ = benzyl with a melting point of 75 ° C. was obtained from the combined extracts. This corresponded to a yield of 85% of theory.

Η NMR spectrum: 1.73 ppm (H _x , H _x -, 2H), 2.01 ppm (H _γ , 1H), 2.42 ppm (H _A , H _A >, 2H), 2.95 ppm (H _B , H _B <, 2H) (AA'BB'XX'Y system), 3.59 ppm (s, 4H), 3.68 ppm (s, 2H), 7.19-7.37 ppm (m, 15H).

¹³ C-NMR spectrum: 139.6 (s), 137.5 (s), 129.6 (d), 128.8 (d), 128.1 (d),

127.9 (d), 126.8 (d), 126.7 (d), 59.4 (t), 56.1 (t), 51.8 (t), 47.5 (d), 25 , 8 (d).

b) In an analogous manner from 5.0 g of N, O-acetal, which had been obtained according to Example 3, and 2.54 g of lithium aluminum hydride in 90 ml of tetrahydrofuran, 3.01 g of an amine of the formula endo- (I) with R ¹ = R ² = allyl and R ³ = benzyl as a colorless oil with a boiling point of 1 15 ° C / 1.3 10 ^"3 mbar. This corresponded to a yield of 67% of theory.

1H-NMR spectrum: 1.72 ppm (H _x , H _x -, 2H), 2.11 ppm (H _γ , 1H), 2.35 ppm (H _A , H _A -, 2H), 3, 10 ppm (H _B , H _B -, 2H) (AA'BB'XX'Y system), 3.61 ppm (s,

2H), 3.16 ppm (H∞, 4H), 5, 15 ppm (H _M , 1H), 5.18 ppm (H _N , 1H), 5.92 ppm (H _A2 , 1H) (AMNXz system ), 7.20-7.35 ppm (m, 5H). ¹³ C NMR Spectrum - 139.7 (s), 134.7 (s), 128.4 (d), 127.9 (d), 126.4 (d), 117.1 (t), 58, 7 (t), 55.1 (t), 51.8 (t), 46.9 (d), 25.6 (d).

Example 6

1.88 ml of a 1 molar diisobutylaluminum hydride solution in tetrahydrofuran were added dropwise to a solution of 0.5 g of N, O-acetal, which had been obtained according to Example 4, in 30 ml of tetrahydrofuran. The solution was 5 hours at 60 ° C. and stirred for a further 3 days at room temperature and then poured onto a mixture of 20 g of ice, 40 ml of water (40 ml) and 1 ml of 96% by weight sulfuric acid. Then, with ice cooling, 30 ml of a 3 molar aqueous potassium hydroxide solution were added, the aqueous phase extracted five times with 25 ml of diethyl ether and the ether phase dried over magnesium sulfate. After removing the solvent, bulb tube distillation of the residue (130 ° C / 1.3 10 ^"3 mbar) and crystallizing the

Distillate from pentane was obtained 0.41 g of an amine of the formula endo- (I) with R ¹ = R ² = R ³ = benzyl with a melting point of 75 ° C. This corresponded to a yield of 89% of theory

Example 7

a) A solution of 0.5 ml of vinyl chloroformate in 5 ml of chloroform was added dropwise at 50 ° C. in the course of 15 minutes to a solution of 1.95 g of the product from Example 5 in 80% chloroform. The mixture was stirred at 50 ° for 1.5 hours C and stirred for 2 hours at room temperature

The solvent was then removed in vacuo and the residue was distilled in a rotating spherical tube at 140 to 180 ° C / 1.3 10 ^"3 mbar. The distillate was extracted four times with 20 ml each of pentane and the combined extracts were distilled again, lastly at 135 ° C / 1.3 10 ^"3 mbar This gave 0.93 g of an amine of the formula endo- (I), in which R ¹ = R ² = benzyl and R ³ =

COOCH = CH ₂ stood that corresponded to a yield of 50% of Theoπe 1H NMR Spectrum: 1.70 ppm (H _x , H _γ , 2H), 2.09 ppm (H _z , 1H), 3.39 ppm (H _A , 1H), 3.49 ppm (Hc, 1H) ), 3.51 ppm (H _B , 1H), 3.56 ppm (H _D , 1H) (ABCDXYZ system), 3.60 ppm (s, 4H), 4.45 ppm (dd, 1H), 4 , 76 ppm (dd, 1H), 7.20-7.36 ppm (m, 11H).

¹³ C NMR Spectrum: 150.9 (s), 142.4 (d), 137.2 (s), 129.4 (d), 128.1 (d), 127.0 (d), 94 , 7 (dd), 57.7 (t), 46.0 (t), 45.2 (t), 43.4 (d), 23.2 (d), 22.4 (d).

b) In an analogous manner, a product of the formula endo- (I) was obtained from 0.5 g of the product from Example 5 and 0.18 ml of methyl chloroformate in a mixture of 15 ml of chloroform and 3 ml of pyridine, in which R ¹ = R ² = benzyl and R ³ = COOCH ₃ . The yield was 0.21 g, which was 46% of the

Theory corresponded.

1H NMR Spectrum: 1.70 ppm (H _X H _Y , 2H), 2.09 ppm (Hz, 1H), 3.37 ppm

(H _A , 1H), 3.46 ppm (H _B , 1H), 3.52 ppm (H _c , 1H), 3.55 ppm (H _D , 1H) (ABCDXYZ system), 3.61 ppm ( s, 4H), 3.74 ppm (s, 3H), 7.22-7.34 ppm (m, 10 H).

¹³ C NMR Spectrum: 154.5 (s), 137.3 (s), 129.5 (d), 128.1 (d), 127.0 (d), 57.3

(t), 52.1 (q), 46.0 (t), 45.2 (t), 43.2 (d), 23.4 (d), 22.7 (d).

Example 8

A solution of 0.93 g of the product obtained according to Example 7a) in

30 ml of chloroform was mixed with 7 ml of 37% strength by weight aqueous hydrochloric acid and stirred at room temperature for 14 hours. 20 ml of water were then added and the chloroform was removed in vacuo. The aqueous solution was shaken out with 20 ml of diethyl ether and 25 ml of aqueous 5 molar potassium hydroxide solution were then added while cooling with ice. The basic solution became that

Reaction product in a Kutscher-Steudel apparatus (see Römpp Chemical Lexicon, 9th edition on CD-ROM, version 1.0 (1995)) with 80 ml for 5 days Extracted diethyl ether. The Kugelrohr distillation of the extract at 105 ° C / 1.3 10 ^"3 mbar and crystallization of the distillate from pentane gives 0.55 g of pure product of the formula endo- (I) with R ¹ = R ² = benzyl and R ³ = hydrogen. This corresponded to a yield of 74% of theory, and the product had a melting point of 86 ° C.

1H-NMR spectrum 1.45 ppm (H _x , H _x >, 2H), 1.98 ppm (H _γ , 1H), 2.52 ppm (H _A , H _A 2H), 2.78 ppm (H _B , H _B -, 2H) (AA'BB'XX'Y system), 1.85 ppm (s, broad, 1H), 3.55 ppm (s, 4H), 7.22-7.35 ppm (m, 10H).

¹³ C NMR Spectrum - 138.2 (s), 129.5 (d), 128.2 (d), 127.1 (d), 59.7 (t), 48.3 (t), 45 , 0 (d), 24.5 (d)

Example 9

A solution of 0.21 ml of iodotrimethylsilane and 0.10 g of the product from Example 7b) in 5 ml of chloroform was stirred for 6.5 hours at 60 ° C. Then 2 ml of a concentrated methanolic hydrogen chloride solution were added at 20 ° C. After 10 -minute stirring was mixed with a solution of 0.65 g of sodium methanolate in 20 ml of methanol. The removal of the solvent in vacuo followed by the addition of 10 ml of aqueous 2-normal potassium hydroxide solution gave the free base, which was extracted five times with 20 ml of diethyl ether and distillation in a Kugelrohr at 105 ° C / 1.3 10 ^"3 mbar was obtained in pure form. 0.07 g of a product of the formula endo- (I) with R ¹ = R ² = benzyl and R ³ = Hydrogen corresponded to a yield of 85% of theory

Example 10

A solution of 0.13 g of the starting material also used in Example 9 in 14 ml of diethyl ether / chloroform mixture (1 1) was mixed with hydrogen chloride in the

Ammonium salt transferred and this isolated after evaporation of the solvent. A solution of the ammonium salt obtained after evaporation of the solvent in 30 ml of methanol was debenzylated with hydrogen in the presence of 0.1 g Pd / C catalyst (10% Pd). The catalyst was then filtered off and the solvent was removed in vacuo. The diamine of the formula (V) with R ⁶ -COOCH _{3 was} obtained by treating the residue with 0.65 g of sodium carbonate and distilling the mixture in a Kugelrohr at 150 ° C./1.3'10 ^"3 mbar. This was obtained by sublimation at ^'mbar purified 70 ° C / 1.3 10 ^"3. 0.04 g of the diamine with a melting point of 76 ° C. was obtained. This corresponded to a yield of 66% of theory.

1H NMR spectrum: 1.60 ppm (H _x , H _γ , 2H), 2.48 ppm (H _z , 1H), 3.46 ppm, 3.53 ppm

(H _A / Hc, 2H), 3.56 ppm, 3.62 ppm (H _B / H _D , 2H), (ABCDXYZ system), 3.68 ppm (s, 3H).

¹³ C NMR spectrum: 154.6 (s), 52.2 (q), 44.9 (t), 44.3 (t), 31.4 (d), 21.3 (d), 20.4 (d).

Example 11

A solution of 1.86 g of the product obtained according to Example 5b in 9 ml of dichloromethane was added to a mixture of 0.16 g of tetrakis (triphenylphosphine) palladium and 3.49 g of N, N'-dimethylbarbituric acid and 5 hours at 40 ° C stirred. The solvent was then evaporated. Then were

40 ml of saturated aqueous sodium carbonate solution was added to the residue and that

Mixture extracted three times with 40 ml of diethyl ether. The ether extract was mixed with 35 ml of a 2 molar aqueous hydrochloric acid solution, the ether evaporated and the residue washed three times with 30 ml of ethyl acetate. It remained pure

Amine hydrochloride. After adding 10.6 g of sodium carbonate, five times

Extract with 30 ml diethyl ether each and distill the extract in a Kugelrohr

70 ° C / 1.3 10 ^"3 mbar, 0.9 g of free base of the formula (V) with R ⁶ = benzyl was obtained. This corresponded to a yield of 69% of theory. 1H NMR Spectrum: 1.37 ppm (H _x , H _x -, 2H), 2.35 ppm (H _γ , IH), 2.65 ppm (H _B , H _B -, 2H), 3.05 ppm (H _A , H _A -, 2H), (AA'BB'XX'Y system), 1.92 ppm (s, broad, 2H), 3.59 ppm (s, 2H), 7.20- 7.31 ppm (m, 5H).

¹³ C-NMR spectrum: 139.4 (s), 128.2 (d), 128.1 (d), 126.7 (d), 59.8 (t), 52.5 (t), 34 , 5th

(d), 19.9 (d).

Example 12

a) To a cooled to -78 ° C solution of 0.7 g of sodium in 100 ml of liquid

2 g of finely powdered 3-benzyl-6-dibenzylamino-3-azabicyclo [3.1.0] bicyclohexane-6-carbonitrile were added in one portion of ammonia with vigorous stirring. The cooling bath was then removed and the mixture was stirred until the ammonia had completely evaporated. The remaining residue was extracted three times with 30 ml of diethyl ether each time and the combined extracts were distilled in a Kugelrohr at 190 ° C./7 10 ^-3 mbar. The distillation gave 1.76 g of a diamine of the formula endo- (I) with R ¹ = R ² = R ³ = benzyl as a clear, pale yellow oil, which subsequently crystallized The crystalline substance thus obtained, melting point from 72 to 74 ° C., corresponded to a yield of 94% of theory.

b) In an analogous manner, 2.0 g of 6-endo-dibenzylamino-3-azabi-cyclo [3.1.0] hexane-6-carbonitrile and 0.7 g of sodium in 100 ml of liquid ammonia became 6-endo-dibenzylamino-3 -azabicyclo [3.1.0] hexane implemented. The crude product obtained (1.61 g) was purified by distillation under high vacuum. 1.09 g of a fraction of 115 to 150 ° C./7'10 ^"3 mbar were obtained, the pure 6-endo-dibenzylamino-3-azabicyclo [3.1.0] hexane of the formula endo- (I) with R ¹ = R ² = benzyl and R ³ = hydrogen, which corresponded to a yield of 60% of theory.

c) In an analogous manner 1.5 g of 6-endo-dibenzylamino-3-methyl-3-azabicyclo [3.1.0] hexane-6-carbonitrile and 0.65 g of sodium in 60 ml of liquid Ammonia converted to 6-endo-dibenzylamino-3-methyl-3-azabicyclo [3.1.0] hexane. The crude product obtained (1.4 g) was purified by distillation under high vacuum. 0.96 g of a fraction of 130 to 150 ° C / 7'10 ^"3 mbar was obtained, the pure 6-endo-dibenzylamino-3-methyl-3-azabicyclo [3. L.Ojhexane of the formula endo- (I) with R ¹ = R ² = benzyl and R ³ = methyl, which corresponded to a yield of 70% of theory.

1H NMR Spectrum: 1.80 ppm (H _x , H _x ., 2H), 2.03 ppm (H _γ , IH), 2.33 ppm (H _A , H _A -, 2H), 3.02 ppm (H _B , H _B -, 2H), (AA'BB'XX'Y system), 2.34 ppm (s, 3H), 3.60 ppm (s, 4H), 7.25 - 7, 36 ppm (m, 10H).

¹³ C-NMR spectrum: 137.9 (s), 130.2 (d), 128.6 (d), 127.5 (d), 56.5 (t), 54.1 (t), 48 , 2 (d) m 41.3 (q), 27.3 (d).

Example 13

Ammonia was passed at -78 ° C into a mixture of 20 ml of ethylamine and 0.14 g of lithium. After the beginning of blue coloration, the inflow of ammonia was stopped and the mixture was stirred at this temperature until the lithium had completely dissolved. Then the solution was warmed to 0 ° C. After the excess ammonia had been evaporated, 40 ml of ethylamine and 1.0 g of 6-endo-dibenzylamino-3-azabicyclo [3.1.0] hexane-6-carbonitrile were added. A color change from red to yellow-green indicates the end of reductive debenzylation. Excess lithium was then destroyed by adding ammonium chloride. After evaporating the solvent, extracting the residue three times with 30 ml of diethyl ether each time and distilling the extract at 100 to 150 ° C./7 10 ^"3 mbar in a Kugelrohr, 0.70 g of 6-dibenzylamino-3-azabicyclo [3.1. 0] hexane mixture of diastereomers was obtained, which corresponded to a yield of 75% of theory, and a mixture of 80% exo-amine and 20% endo-amine was present, and the ether extracts, after evaporation of the diethyl ether and

Crystallization of the residue from pentane 0.51 g of the pure exo-diastereomer of the formula exo- (I) with R ¹ - R = benzyl and R ³ = hydrogen. That corresponded a yield of 56% of theory. The compound showed a melting point of 51 to 53 ° C.

1H-NMR spectrum: 1.31 ppm (H _x , H _x -, 2H), 1.55 ppm (H _γ , IH), 2.79 ppm (H _B , H _B -, 2H), 2.88 ppm (H _A , H _A - , 2H) (AA'BB'XX'Y system), 3.70 ppm (s, 4H), 7.20-7.35 ppm (m, 10H).

¹³ C-NMR spectrum: 138.4 (s), 129.3 (d), 127.9 (d), 126.7 (d), 58.7 (t), 48.5 (t), 43 , 9th

(d), 26.7 (d).

Example 14

1 g of l-benzyl-5-chloro-4-dibenzylamino-l, 2,5,6-tetrahydropyridine was triturated with 1 g of sodium boron tetrahydride and a mixture of 20 ml of acetonitrile and 2.5 ml of water was added. The mixture was stirred at 70 ° C for 4 hours.

The solvent was then removed in vacuo, and the residue was mixed with a mixture of 10 ml of 18% hydrochloric acid and 5 ml of acetonitrile and stirred at 60 ° C. for 2 hours. Removal of the solvent in vacuo, addition of 25 ml of 4-molar potassium hydroxide solution and extraction with 4 × 30 ml of ether gave crude diamine which, after dissolving in pentane, was purified by distillation in vacuo in a bulb tube. 0.5 g of the same amine as in Example 5 was obtained. This corresponds to a yield of 55%.

Example 15

7-πα.5α, 6ß-6-dibenzylamino-3-azabicvclor3.1.01hex-3-ylV6-fluoro-l- (2.4-difluorophenyl - 1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid ethyl ester

896.5 mg of 7-chloro-6-fluoro-1 - (2,4-difluorophenyl) -1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid ethyl ester were suspended in 80 ml of acetonitrile, with 9 , 5 ml of triethylamine and 632.5 mg of lα, 5α, 6ß-6-dibenzylamino-3-azabicyclo [3.1.0] hexane and heated to 60 ° C. for 5 hours. The mixture was then concentrated at 60 ° C./20 mbar, the residue was mixed with water, the precipitate which had separated out was filtered off with suction, washed with water and dried at 70 ° C. in a high vacuum. 1.3 g of a crude product were obtained, which was purified by chromatography on 100 g of silica gel (Amicon, 60A 35-70 μm) with dichloromethane / methanol (95: 5) as the mobile phase.

Yield: 1.24 g (79.5% of theory), melting point 178-179 ° C (with decomposition).

1H-NMR (400 MHz, CF ₃ COOD): δ = 1.52 (t, J - 7.3 Hz, 3H), 2.20 (m, 2H), 3.06 (t, J = 7.3) Hz, IH), 3.16-3.29 (m, IH), 3.29-3.41 (m, IH), 3.65-3.83 (m, 2H), 4.54 (d, J = 12.9 Hz, 2H), 4.71 (q, J - 7.3 Hz, 2H), 4.72-4.83 (m, 2H), 7.23 (t, J = 8.4 Hz, IH), 7.32 (t, J = 7.4 Hz, IH), 7.45-7.73 (m, 1 IH), 8.31 (d, J = 10.7 Hz, IH) , 9.14 (s, IH).

FAB mass spectrum: me 625 ([M + H] ⁺ ). Example 16

7- (lα.5α.6ß-6-Amino-3-azabicvclor3.1.01hex-3-vπ-6-fluoro-l- (2,4-difluorophenyl-1,4-dihydro-4-oxo-1,8-naphthyridine -3-carboxylic acid ethyl ester

1.2 g 7- (lα, 5α, 6ß-6-dibenzylamino-3-azabicyclo [3.1.0] hex-3-yl) -6-fluoro-l- (2,4-di-fluoro-phenyl-1 Ethyl 4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate was dissolved in 200 ml of ethanol, 1 ml of concentrated hydrochloric acid and 100 mg of palladium / carbon (5%) were added and the mixture was hydrogenated at room temperature for 20 hours under normal pressure A suspension was obtained which was filtered off together with the catalyst and dissolved in a mixture of dichloromethane / methanol / 17% ammonia (30: 8: 1), the undissolved contact was filtered off, the solution was concentrated and the residue was concentrated with dichloromethane / Methanol 17% ammonia (30: 8: 1) as eluent, chromatographically purified on 40 g silica gel (Amicon, 60A 35-70μm) The main fraction was concentrated and dried at 60 ° C. under high vacuum.

Yield: 660 mg (77.3% of theory), melting point: 216-218 ° C (with decomposition).

1H-NMR (400 MHz, CDC1 ₃ ): δ = 1.07 (broad, 2H), 1.40 (t, J = 7.5 Hz, 3H), 1.66 (broad, 2H), 2.49 (t, J = 6.9 Hz, IH), 3.45-3.85 (broad, 4H), 4.38 (q, J = 7.5 Hz, 2H), 7.04 (m, 2H) , 7.37 (m, IH), 8.04 (d, J = 12.9 Hz, IH), 8.36 ppm (s, 1H).

FAB mass spectrum: m / e 445 ([M + H] ⁺ ). Example 17

7-πα.5α.6ß-6-amino-3-azabicvclor3.1.01hex-3-ylV6-fluoro-l-C2.4-difluoro-ohenyl-1.4-di-hydro-4-oxo-1.8-naphthyridine-3 -carboxylic acid methanesulfonate

400 mg of 7- (lα, 5α, 6β-6-amino-3-azabicyclo [3.1.0] hex-3-yl) -6-fluoro-l- (2,4-difluorophenyl-l, 4-dihydro -4-oxo-1,8-naphthyridine-3-carboxylic acid ethyl ester was heated in a mixture of 8 ml of water and 2.8 ml of 70% methanesulfonic acid solution for 20 hours at 70 ° C. A suspension was obtained which was cooled in an ice bath The precipitate was filtered off with suction, washed with ice water and dried at 80 ° C. in a high vacuum.

Yield: 276 mg (59.8% of theory), melting point: 244-247 ° C (with decomposition).

1H-NMR (500 MHz, CF ₃ COOD): δ = 2.38 (broad, 2H), 3.1 (s, 3H), 3.28 (t, J = 7.3 Hz, IH), 3, 7-4.8 (broad, 4H), 7.26 (m, 2H), 7.61 (m, IH), 7.82 (m, IH), 7.96 (broad, 3H), 8.27 (d, J = 12.4 Hz, IH), 9.21 (s, IH).

FAB / MS: m / e 417 ([M + H] ⁺ ).

The compound produced had a significantly lower neurotoxicity than the corresponding exo-6-amino compound.

Claims

claims

1. 6-amino-3-azabicyclo [3.1.OJhexanes of the formula

R ^

in the

R ¹ and R ² independently of one another for C ₃ -C ₄ alkenyl or Ar-CH (R ') - with R' = hydrogen or -CC ₄ alkyl and Ar = optionally substituted

R ³ for hydrogen ^" , C ₃ -C ₄ alkenyl, Ar-CH (R ') - with R' - hydrogen or

-C-C ₄ alkyl and Ar = optionally substituted C6-Cιo-aryl or COOR ⁴ with R ⁴ = CC ₄ alkyl or C ₂ -C ₄ alkenyl.

2. Process for the preparation of compounds of the formula

in the

R ¹ and R ^{2 are the} same and for C ₃ -C ₄ alkenyl or Ar-CH (R ') - with R' = hydrogen or -CC ₄ alkyl and Ar = optionally substituted C ₆ - Cio-aryl and R ^{3 has} the same scope as R ¹ and R ² , but can be different from R ¹ and R ² ,

characterized in that a chlororenamine of the formula

in the

R ¹ and R ^{2 are the} same and are C ₃ -C ₄ alkenyl or Ar-CH (R ') - with R' - hydrogen or -CC ₄ -alkyl and Ar = optionally substituted Cβ-Cio-aryl and

reacted with a C 1 -C ₄ -alkyl alcoholate, thus obtaining an N, O-acetal of the formula (III),

in the

R ¹ , R ² and R ^{3 have} the meaning given for formula (II),

and subsequently treated with a hydride transfer agent.

3. Process for the preparation of compounds of the formula

in the

R ¹ and R ^{2 are the} same and represent Ar-CH (R ') - with R' = hydrogen or CC ₄ - alkyl and Ar = optionally substituted Cβ-cio-aryl and

R ^{3 has} the same scope as R 'and R ² , but may be different from R ¹ and R ² ,

characterized in that a chlororenamine of the formula

in the

R ¹ and R ^{2 are the} same and for Ar-CH (R ') - with R' = hydrogen or Cι-C ₄ -

Alkyl and Ar = optionally substituted C ₆ -Cιo-aryl and

reacted directly with a hydride transfer agent, the resulting primary product is subjected to an acidic hydrolysis and the amine is liberated.

4. Process for the preparation of compounds of the formula

and

in the

R ¹ and R ² independently of one another for C ₃ -C ₄ alkenyl or Ar-CH (R ') - with R' = hydrogen or -CC ₄ -alkyl and Ar = optionally substituted

R ³ for hydrogen, CC ₆ alkyl, C ₃ -C ₄ alkenyl, Ar-CH (R ') - with R' = hydrogen or C ₁ -C ₄ alkyl and Ar = optionally substituted C ₆ - cio-aryl or COOR ⁴ with R ⁴ = dC ₄ alkyl or C ₂ -C ₄ alkenyl,

characterized in that a bicyclic nitrile of the formula

in the

R ¹ and R have the meaning given for formula (I) and R ⁵ for hydrogen, -CC ₆ alkyl _> C ₃ -C ₄ alkenyl, C ₆ -Cιo-Ar-C C ₄ alkyl or COOR ⁴ with R ⁴ = CC ₄ alkyl or C ₂ -C ₄ - Alkenyl stands,

with an alkali metal in liquid ammonia, optionally in a mixture with a mono- or dialkylamine.

5. Process for modifying the new amines of the formula

R ¹ R ²

in the

R ¹ and R ² independently of one another for C ₃ -C ₄ -alkenyl or Ar-CH (R ') - with R' = hydrogen or C ₁ -C -alkyl and Ar = optionally substituted

R ³ for hydrogen, C ₃ -C ₄ alkenyl, Ar-CH (R ') - with R' = hydrogen or Cι-C ₄ alkyl and Ar = optionally substituted C ₆ -Cιo-aryl or COOR ⁴ with R ⁴ = dC ₄ alkyl or C ₂ -C ₄ alkenyl,

by splitting off one or more of the radicals R, R and R.

6. The method according to claim 5, characterized in that amines of the formula (I)

in the R ¹ and R ² independently of one another for Ar-CH (R ') - with R' = hydrogen or -CC ₄ -alkyl and Ar = optionally substituted Cβ-Cio-aryl and

R ³ for hydrogen, Ar-CH (R ') - with R' = hydrogen or C Q-alkyl and Ar = optionally substituted C ₆ -Cιo-aryl or COOR ⁴ with R ⁴

= C 1 -C ₄ -alkyl,

undergoes a hydrating treatment.

7 The method according to claim 5, characterized in that for the preparation of amines of formula (I) with R ³ = hydrogen, an amine of formula (I) with the radical R ³ = Ar-CH (R ') - with R' = Hydrogen or C ₁ -C ₄ alkyl and Ar = optionally substituted Cβ-Cw-aryl are reacted with a chloroformic acid vinyl ester and the urethane thus obtained is saponified with acid.

8. The method according to claim 5, characterized in that for the preparation of amines of formula (I) with R ³ = hydrogen, an amine of formula (I) with the radical R ³ = Ar-CH (R ') - with R' = Hydrogen or CC ₄ alkyl and Ar = optionally substituted Ce- o-aryl with a chloroformic acid alkyl ester and cleaves the urethane thus obtained with halotrialkylsilane.

9 The method according to claim 5, characterized in that the amines

Formula (I) in which R ¹ , R ² and R ³ can have the meaning given for formula (I) and in which at least one of the radicals is C3-C4-alkenyl, with a tetrakis (triarylphosphine) palladium and one CH-

Acid treated.

10. Use of compounds of formula (I) of claim 1 for the preparation of quinolone and naphthyridinecarboxylic acid derivatives.

11. Use according to claim 10 for the preparation of 7- (6-amino-3-azabicyclo [3.1.0] hex-3-yl) -6-fluoro-1 - (2,4-difluorophenyl) - 1,4 dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid and its salts.