NZ187392A - Acyl derivatives of certain cephalosporins and pharmaceutical compositions containing them - Google Patents

Description

New Zealand Paient Spedficaiion for Paient Number 1 87392 1 8739 n-fec.y t;-J?) *2-3 •"» Ccr;:pZ©-:.3 u-3ccif:ccti0n riku.^ * 5 '78 pt^~. COlj)$oil fiblK 3iJ 5H-S "r'VMAY 1984 iasa. eacBDBQieaioaD P. s No.: Date: NEW ZEALAND PATENTS ACT, 1953 COMPLETE SPECIFICATION "ACYL DERIVATIVES" fy We, F* HOFFMANN-LA ROCHE « CO. AKTIENGESELLSCHAFT, 124-184 Grensacherstrasse, Basle, Switzerland, a Swiss company hereby declare the invention for which X / we pray that a patent may be granted to r^/us, and the method by which it is to be performed, to be particularly described in and by the following statement:- • .... i £ HAN 4 410/4J.8 The present invention relates to acyl derivatives. More particularly, the invention is concerned with acyl derivatives, a process for the manufacture thereof and pharmaceutical preparations containing same.

The acyl derivatives provided by the present invention are compounds of the general formula h h r 1on=c c0nh- -chg s x cooh , wherein R represents furyl, thienyl or phenyl optionally substituted by halogen, hydroxy, lower alkoxy or lower alkyl, represents alkyl or aminocarbonylxtiethyl and X represents a group of the formula (I) 3 (a) or sn' (b) in which one of the two symbols R2 and R^ or and R- represents hydrogen and the (c) Mn/20.4.1978 187392 other represents lower alkyl, carboxymethyl or sulphomethyl, as well as salts of said compounds and hydrates of said salts.

Examples of salts of the compounds of formula I are alkali 5 metal salts such as the sodium and potassium salt, the ammonium salt, alkaline earth metal salts such as the calcium salt, salts with organic bases such as salts with amines (e.g. salts with N-ethyl-piperidine, procaine, dibenzylamine, N,N'-dibenzylethyl-ethylenediamine, alkylamines or dialkylamines) as well as salts 10 with amino acids (e.g. salts with arginine or lysine). The salts can be mono-salts or di-salts. ' The second salt formation occurs at the tautomeric enol form ■, Qf the triazine group (b), said form being acidic.

-• The compounds of formula I also form acid addition salts 15 with organic or inorganic acids. Examples of such salts are hydrohalides (e.g. hydrochlorides, hydrobromides and hydro-iodides) as well as other mineral acid salts (e.g. sulphates, nitrates, phosphates and the like), alkylsulphonates and mono-arylsulphonates (e.g. ethanesulphonates, toluenesulphonates, 20 benzenesulphonates and the like) and other organic acid salts (e.g. acetates, tartrates, maleates, citrates, benzoates, salicylates, ascorbates and the like).

The salts of the compounds of formula I can be hydrated. The hydration can be effected in the course of the manufacturing 25 process or can occur gradually as a consequence of the hygro scopic properties of an initially anhydrous salt of a compound of formula I. 187392 The aforementioned lower alkyl groups are either straight--chain or branched-chain and can contain up to 7 carbon atoms (e.g. methyl, ethyl, n-propyl, isopropyl, n-pentyl and n-heptyl). The lower alkoxy groups have an analogous significance. The halogen atom is fluorine, chlorine, bromine or iodine with chlorine and bromine being preferred.

Preferred groups denoted by R are furyl, thienyl and phenyl, especially furyl. preferably represents methyl.

X preferably represents the group of formula (c) or a group of formula (a) or (b) in which one of the two symbols R£ and R^ or R^ and R^ represents hydrogen and the other represents methyl. Especially preferred groups denoted by X are the 1,2,5,6--tetrahydro-2-methyl-5,6-dioxo-as-triazin-3-yl group and the 1,4,5,6-tetrahydro-4-methvl-5,6-dioxo-as-triazin-3-yl group.

Preferred acyl derivatives provided by the present invention are the compound (R)-7-[2-(2-furyl)-2-(methoxyimino)-acetamido]-3-/ [(1,2,5,6-tetrahydro-2-methyl-5,6-dioxo-as--triazin-3-yl)thio]methyl_7-3-cephem-4-carboxylic acid and salts thereof as well as the hydrates of said salts.

The compounds of formula I as well as their salts and hydrates of said salts can exist in the syn-isomeric form R—C—CONH 1 I N X0R1 or in the anti-isomeric form 187392 r c—conh c R1° or as mixtures of these two forms. The syn-isomeric form is preferred as are mixtures in which the syn-isomeric form predominates.

According to the process provided by the present invention, the acyl derivatives aforesaid (i.e. the compounds of formula I as well as their salts and hydrates of said salts) are manufactured by (a) reacting a compound of the general formula h h ch2—s—x (ii) cooh , wherein X has the significance given earlier and the carboxy group can be present in protected form, with an acid of the general formula r10n=( ■cooh (III) , wherein R and R^ have the significance given earlier, or with a reactive functional derivatxve of this acid and, where required, cleaving off the protecting group, 187592 or (b) reacting a compound of the general formula r h I f r 1on=c conh cooh , wherein R and R^ have the significance given earlier, and Y represents a leaving group, - - i ------ , with a thiol of the general formula hs—x (v) , wherein X has the significance given earlier, in the presence of water, and (c) if desired, converting the reaction product into a salt or a hydrate of such a salt.

The carboxy groups present in the starting materials of formula II can be protected if desired; for example, I esterification to form a readily cleavable ester such as a silyl ester (e.g. the trimethylsilyl ester). The carboxy group can also be protected by salt formation with an inorganic base or a tertiary organic base such as triethylamine. h -ch2 y (IV) 1 873 0 Examples of reactive functional derivatives of acids of formula III include halides (i.e. chlorides, bromides and fluorides), azides, anhydrides, especially mixed anhydrides with strong acids, reactive esters, (e.g. N-hydroxysuccinimide esters) and amides (e.g. imidazolides).

Examples of leaving groups denoted by Y in compounds of formula IV include halogen atoms (e.g. chlorine, bromine or iodine), acyloxy groups (e.g. lower alkanoyl groups such as acetoxy), lower alkylsulphonyloxy or arylsulphonyloxy groups (e.g. mesyloxy or tosyloxy) and the azido group.

The reaction of a compound of formula II with an acid of formula III or a reactive derivative thereof can be carried out in a manner known per se. Thus, for example, a free acid of formula III can be condensed with one of the aforementioned esters of a compound of formula II in the presence of a carbodi-imide (e.g. dicyclohexylcarbodiimide) in an inert solvent (e.g. ethyl acetate, acetonitrile, dioxan, chloroform, methylene chloride, benzene or dimethylformamide) and the ester group can subsequently be cleaved off. Oxazolium salts (e.g. N-ethyl-5--phenyl-isoxazolium-31-sulphonate) can be used in the place of carbodiimides.

According to another embodiment, a salt of an acid of formula II (e.g. a trialkylammonium salt) is reacted with a reactive functional derivative of an acid of formula III as mentioned earlier in an inert solvent (e.g. one of the solvents specified earlier). 187392 According to a further embodiment, an acid halide, preferably the acid chloride, of an acid of formula III is reacted with an amine of formula II. The reaction is preferably carried out in the presence of an acid-binding agent; for example, in the presence of aqueous alkali, preferably sodium hydroxide, or in the presence of an alkali metal carbonate such as potassium carbonate, or in the presence of a lower-alkylated amine such as triethylamine. Water is preferably used as the solvent, although the reaction can also be carried out in an aprotic organic solvent such as, for example, dimethylformamide, dimethyl sulphoxide or hexamethylphosphoric acid triamide.

The reaction of a compound of formula II with a compound of formula III or a reactive functional derivative thereof can be carried out conveniently at a temperature between about -40°C and room temperature, for example at about 0°-10°C.

The reaction of a compound of formula IV with a thiol of formula V can be carried out in a maimer known per se; for example, at a temperature between about 40°C and 80°C, conveniently at about 60°C, in water or in a buffer solution : having a pH of about 6 to 7, preferably 6.5. i After completion of the!reaction of a compound of formula II with an acid of formula III or a reactive derivative thereof, # i87392 any protecting group present is cleaved off. Where the protecting group is a silyl group (silyl ester), this group can be cleaved off especially readily by treating the reaction product with water. Where the carboxyl group is protected by salt formation (e.g. with triethyl-amine), then the cleavage of this salt-forming protecting group can be carried out by treatment with acid. In this case there can be used as the acid, for example, hydrochloric acid, sulphuric acid, phosphoric acid or citric acid.

The starting materials of formula II hereinbefore can be prepared by reacting a compound of the general formula h h 1 \ h2n- -ch2—v (VI) cooh , wherein Y has the significance given earlier with a thiol of formula V hereinbefore. The reaction can be carried out under the same conditions as described earlier in connection with the reaction of a compound of formula TV with a thiol of formula V.

A syn/anti mixture of a compound of formula I which may be obtained can be separated into the corresponding syn- and anti--forms in the usual manner; for example, by recrystallisation or by chromatographic methods using a suitable solvent or solvent mixture.

The compounds of formula I, their salts and the hydrates of said salts have antibiotic, especially bactericidal, activity. They have a wide spectrum of activity against gram-positive and gram-negative microorganisms, including ^-lactamase forming Staphylococci and various 3-lactamase forming gram-negative bacteria such as, for example, Haemophilus influenzae, Escherichia coli, Proteus species and Klebsiella species.

The compounds of formula I as well as their pharmaceutically acceptable salts and hydrates of said salts can be used for the treatment and prophylaxis of infectious diseases. In the case of adults a daily dosage of about 1 g to about 4 g may be administered. Administration by the parenteral route is especially preferred.

In order to demonstrate the antimicrobial activity of the compounds provided by the present invention, the following representative compounds were tested: Compound A: (7R)-7-[2-(2-furyl)-2-(methoxyimino)acetamido]-3--/ [(1,2,5,6-tetrahydro-2-methyl-5,6-dioxo-as--triazin-3-yl)thio]methyl_/-3-cephem-4-carboxylic acid. #10 1 873* Compound B: (7R)-7-[2-(2-furyl)-2-(methoxyimino)acetamido]-3- [(1-amino-l,2-dihydro-2-oxo-4-pyrimidinyl)thio] methyl_/-3-cephem-4-carboxylic acid.

Compound C: (7R)-7-[2-(phenyl)-2-(methoxyimino)acetamido]-3- [(1,2,5,6-tetrahydro-2-methyl-5,6-dioxo-as--triazin-3-yl)thio]methyl_7-3-cephem-4-carboxylic acid.

Compound D: (7R)-7-[2- (2-furyl)-2-(methoxyimino)acetamido]-3--£~ [(1,4,5,6-tetrahydro-4-methyl-5,6-dioxo-as--triazin-3-yl)thio]methyl_7-3-cephem-4-carboxylic acid.

Compound E: (7R)-7-[2-(methoxyimino)-2-(2-thienyl)acetamido]--3-/~ [(1,2,5,6-tetrahydro-2-methyl-5,6-dioxo-as--1r iaz in-3-y1)thio]methy1_7-3-c ephem-4-carboxylie acid.

Compound F: (7R)-3-/ [(1-ethyl-l,4,5,6-tetrahydro-5,6-dioxo--as-triazin-3-yl)thio]methyl_7~7-[2-(2-furyl)-2--(methoxyimino)acetamido]-3-cephem-4-carboxylic acid.

Compound G: (7R)-7-/ 2-[ (carbamoylmethoxy)imino]-2-(2-furyl)-acetamido_/-3-/~~ [(1,4,5,6-tetrahydro-4-methyl-5,6--dioxo-as-triazin-3-yl)thio]methyl_7-3-cephem-4--carboxylic acid. 63C?B,> C / 3 Activity in vitro: Minimum Inhibitory Concentration (ng/ml) A B C D E F G Haemophilus influenzae strain 1 1. 2 2. 2. 2. 2. 2. . 0 strain 2 0. 16 0. 63 0. 16 0. 31 0. 16 0. 31 0. 63 strain 3 0. 16 0. 63 0. 16 0. 31 0. 16 1. 2 0. 31 strain .4 0. 16 0. 31 0. 16 0. 31 0. 16 0. 16 0. 63 strain 0. 08 0. 31 0. 08 0. 16 0. 08 0. 08 0. 31 strain 6 0. 16 0. 31 0. 08 0. 16 0. 08 0. 08 0. 63 strain 7 0. 08 0. 31 0. 08 0. 16 0. 08 0. 16 0. 63 Klebsiella pneumoniae 40 40 2.

Escherichia coli strain 1 0. 63 2. 1. 2 0. 16 2. 1. 2 0. 31 strain 2 40 80 Proteus mirabilis strain 1 2. strain 2 40 40 Proteus vulgaris 40 1. 2 1. 2 Proteus rettgeri 0. 63 2. 0. 63 0. 63 2. 0. 63 Staphylococcus aureus ATCC 6538 2. 0. 16 2. 0. 63 2. 1. 2 Penicillin resistant strain 1. 2 2. 0. 63 2. 1. 2 Activity in vivo Groups of 10 mice are infected intraperitoneally with an aqueous suspension of Proteus mirabilis. One hour after the infection the test compound is administered subcutaneously. The number of surviving mice is determined on the 4th day. Various dosages of test compound are administered and the dosage at which 50% of the mice survive (CD^0, mg/kg) is determined by interpolation.

Test compound A B C D E F G cd50' mg/kg 0.09 3.0 0.60 0.70 1.15 0.85 0.80 Toxicity (mice r 24 hour values) Test compound A B C .

D E F G LD5q/ mg/kg i. v. 500- 1000- 1000- 500- 2000- 1000- >4000 1000 2000 2000 1000 4000 2000 s.c. >4000 >4000 p.o. >5000 >5000 Pharmaceutical preparations, preferably dry ampoules, can contain the compounds of formula I, their pharmaceutically acceptable salts or hydrates of said salts, optionally in admixture with another therapeutically valuable substance.

Such compounds, salts or hydrates are conveniently mixed with pharmaceutical inorganic or organic inert carrier material, especially one which is suitable for parenteral administration, such as, for example, water or gum arabic. The pharmaceutical preparations are preferably made up in liquid form (e.g. as solutions, suspensions or emulsions). The pharmaceutical preparations may be sterilised and/or may contain adjuvants such as preserving agents, stabilising agents, wetting agents, emulsifying agents, salts for varying the osmotic pressure or buffers. 14 1 The following Examples illustrate the process provided by the present invention: Preparation of the sodium salt of (7R)-7-[2-(2-furyl)-2--(methoxyimino)acetamido]-3-/~[(1,2,5,6-tetrahydro-2-methyl-5,6--dioxo-as-triazin-3-yl)thio]methyl 7~3-cephem-4-carboxylic acid .06 g of 2-methoxyimino-2-furyl-acetic acid (syn/anti mixture 80:20) are dissolved in 150 ml of benzene and treated at 5°-10°C while gassing with nitrogen with 4.2 ml of triethyl-amine, 2.6 ml of oxalyl chloride and 6 drops of dimethylformamide. The mixture is stirred while gassing with nitrogen at 5°-lO°C for 1 hour and at 25°C for 0.5 hour and then evaporated at 40°C in vacuo. The residue is suspended in 150 ml of acetone and treated at 0°C with a solution of 11.2 g of (7R)-7-amino-3--desacetoxy-3-[(1,2,5,6-tetrahydro-2-methyl-5,6-dioxo-as--triazin-3-yl)thio]cephalosporanic acid in 150 ml of water, which has previously been adjusted to pH 7.5 using 2-N aqueous sodium hydroxide. The mixture is stirred at 0°-10°C for 2.5 hours under nitrogen, the pH being held between 7.5 and 8.0 by the addition of 2-N aqueous sodium hydroxide. 500 ml of ethyl acetate are then added and the pH is adjusted to 1.5 with 2-N aqueous hydrochloric acid. After separating the organic phase, the aqueous phase is extracted once with ethyl acetate. The combined organic phases are washed twice with saturated aqueous sodium chloride solution, dried over sodium sulphate and concentrated to a volume of ca 100 ml. Insolubles are filtered off and the orange coloured filtrate obtained is diluted with Example 1 1000 ml of ether. The amorphous (7R)-7-[2-(2-furyl)-2--(methoxyimino)acetamido]-3-/~[(1,2,5,6-tetrahydro-2-methyl--5,6-dioxo-as-triazin-3-yl)thio]methyl_7-3-cephem-4-carboxylic acid which thereby precipitates is filtered off under suction and washed with ether and with low-boiling petroleum ether. The beige coloured product obtained is dissolved in 250 ml of ethyl acetate and insolubles are filtered off. The orange coloured filtrate is treated with 10. ml of a 2-N solution of sodium 2-ethylcaproate in ethyl acetate, whereby the sodium salt of (7R)-7-[2-(2-furyl)-2-(methoxyimino)acetamido]-3-/ [(1,2,5,6--tetrahydro-2-methyl-5,6-dioxo-as-triazin-3-yl)thio]methyl_7~3--cephem-4-carboxylic acid precipitates. This is filtered off under suction, washed with ethyl acetate and low-boiling petroleum ether and dried at 25°C in vacuo for 2 days. The product obtained is a beige coloured powder (syn/anti mixture 80:20); = -108.6° (c = 0.5 in water); R^ value = 0.10 [thin-layer chromatography on Kieselgel-F2^^-finished plates in butanol/glacial acetic acid/water (4:1:1), visualisation with ultraviolet light].

Example 2 Preparation of the sodium salt of (7R)-7-[2-(2-furyl)-2--(methoxyimino)acetamido]-3-/~[(1-amino-l,2-dihydro-2-oxo-4--pyrimidinyl)thio]methyl /-3-cephem-4-carboxylic acid This salt is prepared in a manner analogous to that described in Example 1 from 3.4 g of 2-methoxyimino-2-furyl--acetic acid and 7.11 g of (7R)-7-amino-3-desacetoxy-3-[(1--amino-1,2-dihydro-2-oxo-4-pyrimidinyl)thio]cephalosporanic 1 87"* » » if ^ vy acid. The product is a beige powder (syn/anti mixture 70:30); value = 0.40 [thin-layer chromatography on Kieselgel-F25<j--finished plates in butanol/glacial acetic acid/water (4:1:1), visualisation with ultraviolet light].

Example 3 Preparation of the sodium salt of (7R)-7-[2-(phenyl)-2-(methoxyimino) acetamido]-3-/~[(1,2,5,6-tetrahydro-2-methyl-5,6-dioxo--as-triazin-3-yl)thio]methyl 7~3-cephem-4-carboxylic acid This salt is prepared in a manner analogous to that described in Example 1 from 1.8 g of 2-methoxyimino-phenyl--acetic acid (syn/anti mixture 90:10) and 3.75 g of (7R)-7--amino-3-desacetoxy-3-[(1,2,5,6-tetrahydro-2-methyl-5,6-dioxo--as-triazin-3-yl)thio]cephalosporanic acid. The product is a beige powder (syn/anti mixture 90:10); Ca]^0 = "135° (c = 0.5 in water); R^ value = 0.17 [thin-layer chromatography on Kieselgel-F254~finished plates in butanol/glacial acetic acid/ water (4:1:1), visualisation with ultraviolet light].

Example 4 Preparation of the sodium salt of (7R)-7-[2-(2-furyl)-2--(methoxyimino)acetamido]-3-/ [(1,4,5,6-tetrahydro-4-*methyl--5,6-dioxo-as-triazin-3-yl)thio]methyl 7~3-cephem-4-carboxylic acid This salt is prepared in a manner analogous to that described in Example 1 from 3.4 g of 2-methoxyimino-2-furyl--acetic acid (syn/anti mixture 80:20) and 7.46 g of (7R)-7- 187392 -amino-3-desacetoxy-3-[(1,4,5,6-tetrahydro-4-methyl-5,6-dioxo--as-triazin-3-yl)thio]cephalosporanic acid. The product is a beige powder (syn/anti mixture 80:20); £a]^ = -44° (c = 0.5 in water); value = 0.34 [thin-layer chromatography on Kieselgel- -F254~finished plates in butanol/glacial acetic acid/water (4:1:1), visualisation with ultraviolet light].

Examp le 5 Preparation of the sodium salt of (7R)-7-[2-(methoxyimino)-2--(2-thienyl)acetamido]-3-/~[(1,2,5,6-tetrahydro-2-methyl-5, 6--dioxo-as-triazin-3-yl)thio]methyl 7~3-cephem-4-carboxylic acid This salt is prepared in a manner analogous to that described in Example 1 from 1.85 g of 2-methoxyimino-2-thienyl--acetic acid (syn/anti mixture ca 70:30) and 3.71 g of (7R)-7--amino-3-desacetoxy-3-[ (1,2,5,6-tetrahydro-2-methyl-5,6-dioxo--as-triazin-3-yl)thio]-cephalosporanic acid. The product is a beige powder (syn/anti mixture ca 70:30); = -128.2° (c = 0.5 in water); R^ value = 0.21 [thin-layer chromatography on Kieselgel-F25^-finished plates in butanol/glacial acetic acid/ water (4:1:1), visualisation with ultraviolet light].

Example 6 Preparation of the disodium salt of (7R)-7-[2-(2-furyl)-2- (methoxyimino)acetamido]-3-/ [(2,5-dihydro-2-methyl-5-oxo-6--hydroxy-as-triazin-3-yl)thio]methyl /-3-cephem-4-carboxylic acid This salt is prepared in a manner analogous to that described in Example 1 from 10.12 g of 2-methoxyimino-2-furyl- -acetic acid (syn isomer) and 18.7 g of (7R)-7-amino-3- -desacetoxy-3-[(1,2,5,6-tetrahydro-2-methyl-5,6-dioxo-as- -triazin-3-yl)thio]-cephalosporanic acid. For the salt- -formation there are used 20 ml (2 equivalents) of a 2-N solution of sodium 2-ethylcaproate in ethyl acetate. The product is an almost colourless powder (syn isomer); = -141.6° (c = 0.5 in water); value = 0.14 [thin-layer chromatography on Kieselgel-F254~finished plates in butanol/ glacial acetic acid/water (4:1:1), visualisation with ultraviolet light].

Example 7 Preparation of the sodium salt of (7R)-3-/~[(1-ethyl-l,4,5,6--tetrahydro-5,6-dioxo-as-triazin-3-yl)thio]methyl 7-7-[2-(2--furyl)-2-(methoxyimino)acetamido]-3-cephem-4-carboxylic acid This salt is prepared in a manner analogous to that described in Example 1 from 1.69 g of 2-methoxyimino-2-furyl--acetic acid (syn isomer) and 3.85 g of (7R)-7-amino-3--desacetoxy-3-t(1-ethyl-l,4,5,6-tetrahydro-5,6-dioxo-as--triazin-3-yl)thio]-cephalosporanic acid. The product is a beige powder (syn/anti mixture ca. 70:30); [a]20 = -47.2° D (c = 0.5 in water); R^ value = 0.47 [thin-layer chromatography on Kieselgel-F254~finished plates in butanol/ glacial acetic acid/water (4:1:1), visualisation with ultraviolet light].

Example 8 Preparation of the sodium salt of (7R)-7-/~2-[(carbamoylmethoxy)-imino]-2-(2-furyl)acetamido 7-3-/ C(1,4,5,6-tetrahydro-4-methyl--5,6-dioxo-as-triazin-3-yl)thio]methyl 7~3-cephem-4-carboxylic acid 9.76 g of /~a-[(carbamoylmethoxy)imino]furfuryl_7cephalo-sporin sodium salt (syn/anti mixture ca 70:30) are suspended together with 4.77 g of 1,4,5,6-tetrahydro-4-methyl-5,6-dioxo--3-mercapto-as-triazine in 200 ml of phosphate buffer having a pH of 6.4. The pH is adjusted to 6.4 using 1-N sodium hydroxide while gassing with nitrogen, whereby a dark solution is obtained. This, solution is stirred at pH 6.4-6.5 for 6 hours at 55°-60°C while gassing with nitrogen, the pH being held constant with the aid of an autotitrator with the addition of 1-N sodium hydroxide. The solution is cooled to 0°-5°C and the pH is adjusted to 2 with 2-N hydrochloric acid, whereby the product separates out as the acid. This is filtered off under suction, washed with ice/water and dried at 40°C overnight in vacuo. The product is obtained in the form of the crude acid. For purification, this crude acid is dissolved in 150 ml of methanol and the solution is boiled with active carbon for 2 minutes. The mixture is filtered through a fluted filter and the orange coloured filtrate is concentrated in vacuo. The resin which thereby precipitates is separated and rejected. The concentrated methanolic solution is poured into ether. The acid which thereby precipitates is filtered off under suction and washed with ether and with low-boiling petroleum ether. The product is obtained in the form of the pure acid which, for conversion into the sodium salt, is dissolved in 100 ml of methanol and treated with 5 ml of a 2-N solution of sodium 2-ethylcaproate in ethyl acetate. A small amount of insolubles is filtered off and the orange coloured filtrate is concentrated at 40°C in vacuo. This concentrated solution is added to ethanol, whereby the sodium salt precipitates. This salt is filtered off under suction, washed with ethanol and low-boiling petroleum ether and dried at 40°C overnight in vacuo. There is obtained the sodium salt of (7R)-7-/~2-[(carbamoylmethoxy)-imino]-2-(2-furyl)acetamido_7-3-/—[(1,4,5,6-tetrahydro-4-methyl--5,6-dioxo-as-triazin-3-yl)thio]methyl_7-3-cephem-4-carboxylic acid in the form of a beige powder (syn/anti mixture ca 70:30); [a]2<^ = -30.1° (c = 1 in water); value = 0.29 [thin-layer chromatography on Kieselgel-F254~finished plates in butanol/ glacial acetic acid/water (4:1:1), visualisation with ultraviolet light].

When the starting materials used in the preceding paragraph are replaced by equivalent amounts of /~a-[(methoxy)-imino]furfuryl_/cephalosporin and 1, 2,5,6-tetrahydro-2-methyl--5,6-dioxo-3-mercapto-as-triazine, then there is obtained under otherwise similar conditions the sodium salt of (7R)-7-[2-(2--furyl)-2-(methoxyimino)acetamido]-3-/ [(1,2,5,6-tetrahydro-2--methyl-5,6-dioxo-as-triazin-3-yl)thio]methyl_/-3-cephem-4--carboxylic acid. This salt is identical with the salt obtained according to Example 1.

The following Example illustrates the preparation of a pharmaceutical preparation provided by the present invention:

Claims (26)

- 21 - Example.A 1 739 Preparation of dry ampoules for intramuscular administration A lyophilisate of 1 g of the sodium salt of (7R)-7-[2-(2--furyl)-2-methoxyimino)acetamido]-3-/—[(1,2,5,6-tetrahydro-2--methyl-5,6-dioxo-as-triazin-3-yl)thio]methyl_7-3-cephem--carboxylic acid is prepared in the usual manner and filled into an ampoule. Prior to the administration, the latter is treated with 2.5 ml of a 2% aqueous lidocaine hydrochloride solution. \ 1 8 y ^ ^ ^ - 22 - WHATj^Wfc CLAIM ISj Hraving novr rirti rnl =*771 y Anc~ -,T-i '• -1 J "n"1 -"-' 1 ' "nra nature ul urn. aaid invontion and in what mannar tho oama ic to be performed) wo declare that what wo olaim ioi 1) Process for the manufacture of acyl derivatives of the general formula R h h R 1on==c conh— cooh , wherein R represents furyl, thienyl or phenyl optionally substituted by halogen, hydroxy, lower alkoxy or lower alkyl, R^ represents lower alkyl or aminocarbonylmethyl and X represents a group of the formula
1. (I) € I n>y° -N/^o I R3 (a) (b) or ^nh2 (c) 10 in which one of the two symbols R^and R^ ^ or R^and R^^represents hydrogen and the other represents lower alkyl, carboxymethyl or sulphomethyl, as well as salts of said compounds and hydrates of said salts^ - 23 - which process comprises (a) reacting a compound of the general formula H H ch2—s;—x COOH , wherein X has the significance given above and the carboxy group can be present in protected form, with an acid of the general formula (ii) R1ON=C—COOH (III) 10 , wherein R and R^ have the significance given above, or with a reactive functional derivative of this acid and, where required, cleaving off the protecting group, or (b) reacting a compound of the formula R H H 15 R10N=C CONH- -ch2—y (IV) COOH - 24 - , wherein R and R^ have the significance given above,and Y represents a leaving group, . j with a thiol of the general formula hs—x (v) , wherein X has the significance given above, in the presence of water, and (c) if desired, converting the reaction product into a salt or a hydrate of such a salt.
2. 2) A process according to claim 1, wherein a compound of formula II is reacted with an acid of formula III or a reactive functional derivative thereof.
3. 3) A process according to claim 2, wherein an acid chloride of an acid of formula III is reacted with a compound of formula II in aqueous alkali.
4. 4) / A process according to any one of claims 1 to 3 inclusive wherein there is manufactured a compound of formula I in which- R represents furyl or a salt thereof or a hydrate of such a - 25 - 5> A process according to any one of claims 1 to 4 inclusive, wherein there is manufactured a compound of formula I in which R^ represents methyl or a salt thereof or a hydrate of such a salt.
5. 5
6. 6) A process according to any one of claims 1 to 5 - inclusive, wherein there is manufactured a compound of formula I in which X represents the group of the formula, (c) or a 'group of the formula (a) or (b) in which one of the two symbols R£ and R^ or R^ and R^ represents hydrogen and the other represents methyl or 10 a salt thereof or a hydrate of such a salt.
7. 7) A process according to claim 6, , wherein there is manufactured a compound of formula I in which X represents the 1,2,5,6-tetrahydro-2-methyl-5,6-dioxo-as-triazin-3-yl group or a salt thereof or a hydrate of such a salt. 15
8. 8) A process according to claim <6 , wherein there is manufactured a compound of formula I in which X represents the 1,4,5,6-tetrahydro-4-methyl-5,6-dioxo-as-triazin-3-yl group or a salt thereof or a hydrate of such a salt.
9. 9) A process according to claim .7 , wherein there is 20 manufactured (7R)-7-[2-(2-furyl)-2-(methoxyimino)acetamido]-3--/ [(1,2,5,6-tetrahydro-2-methyl-5,6-dioxo-as-triazin-3-yl)-thio]methyl_7-3-cephem-4-carboxylic acid or a salt thereof or a hydrate of such a salt. 1 87392 - 26 -
10. 10) Process for the preparation of acyl derivatives as hereinbefore particularly described, especially with reference to any one of the foregoing Examples. 187392 - 27 -
11. 11) Process for the manufacture of preparations having antimicrobial properties, characterized in that an acyl derivative of the general formula h h r1on=c—conh cooh • (I) 10 15 wherein R represents furyl, thienyl or phenyl optionally substituted by halogen, hydroxy, lower alkoxy or lower alkyl, R^ represents lower alkyl or aminocarbonylmethyl and X represents a group of the formula r .N/^o R, '5\ /nh2 or (c) 3 (a) (b) in which one of the two symbols R2 and R^ or Rd and R^ represents hydrogen and the other represents lower alkyl, carboxymethyl or sulphomethyl, or a salt thereof or a hydrate of such salt.is mixed, as active substance, with nontoxic, inert, therapeutically 187392 - 28 - compatible solid or liquid carriers, commonly used in such preparations, and/or excipients.
12. 12) Compositions having antimicrobial properties, containing an acyl derivative of the general formula h h R 1on=c conh— (I) cooh 10 wherein R represents furyl, thienyl or phenyl optionally substituted by halogen, hydroxy, lower alkoxy or lower alkyl, R^ represents lower alkyl or aminocarbonylmethyl and X represents a group of the formula 15 other represents lower alkyl, carboxymethyl or sulphomethyl, or a salt thereof or a hydrate of such salt and a carrier. 187392 - 29 -
13. 13) Acyl derivatives of the general formula h h R 1on=c—conh- -chg s x (I) cooh wherein R represents furyl, thienyl or phenyl optionally substituted by halogen, hydroxy, lower alkoxy or lower alkyl, R^ represents lower alkyl or aminocarbonylmethyl and X represents a group of the formula or (a) (b) (c) in which one of the two symbols R2 and 10 or R4 and R5 represents hydrogen and the other represents lower alkyl, carboxymethyl or sulphomethyl, as well as salts of said compounds and hydrates of said salts, whenever prepared according to the process claimed in 15 any one of claims 1-3. 187392 - 30 -
14. 14) Acyl derivatives as set forth in claim 13, wherein R represents furyl, as well as salts of said compounds and hydrates of said salts, whenever prepared according to the process claimed in claim 4.
15. 15) Acyl derivatives as set forth in claim 13 or claim 14 , wherein R^ represents methyl, as well as salts of said compounds and hydrates of said salts, whenever prepared according to the process in claim 5. " ~
16. 16) i Acyl derivatives as set forth in any one of claims 13 to 15 inclusive, wherein X represents the group of formula (c) or a group of formula (a) or (b) in which one of the two symbols R2 and R^ or R^ and R^ represents hydrogen and the other represents methyl, as well as salts of said compounds and hydrates of said salts, whenever prepared according to the process claimed in Claim 6 .
17. 17) Acyl derivatives as set forth in claim 16, wher^Ln X represents the 1,2,5,6-tetrahydro-2-methyl-5,6-dioxo-as-triazin-3-yl group, as well as salts of said compounds and hydrates of said salts, whenever prepared according to the process claimed in Claim 7. 187392 - 31 -
18. 18) Acyl derivatives as set forth in claim 16, wherein X represents the 1,4,5,6-tetrahydro-4-methyl-5,6-dioxo-as-triazin-3-yl group, as well as salts of said compounds and hydrates of said salts, whenever prepared according to the process claimed in claim 8.
19. 19) (7R)-7-[2-(2-Furyl)-2-(methoxyimino)acetamido]-3- £ [(1,2,5,6-tetrahydro-2-methyl-5,6-dioxo-as-triazin-3-yl) thio]methyl _7-3-cephem-4-carboxylic acid as well as salts of this compound and hydrates of said salts, whenever prepared according to the process claimed in Claim 9 • 187392 - 32 -
20. 20) Acyl derivatives of the general formula H H R -jON^C—CONH H2—S—X (X) COOH wherein R represents furyl, thienyl or phenyl optionally substituted by halogen, hydroxy, lower alkoxy or lower alkyl, R^ represents lower alkyl or aminocarbonylmethyl and X represents a group of the formula or ^nh2 (a) (b) (c) in which one of the two symbols R and R 2 3 10 or R^ and R^ represents hydrogen and the other represents lower alkyl, carboxymethyl or sulphomethyl, as well as salts of said compounds and hydrates of said salts. 187392 - 33 -
21. 21) Acyl derivatives as set forth in claim 20, wherein R represents furyl, as well as salts of said compounds and hydrates of said salts.
22. 22) Acyl derivatives as set forth in claim 20 or claim 21, wherein R^ 5 represents methyl, as well as salts of said compounds and hydrates of said salts.
23. 23) Acyl derivatives as set forth in any one of claims 20 to 22 inclusive, wherein X represents the group of formula (c) or a group of formula (a) or (b) in which one of the two 10 symbols R2 and R^ or R^ and R^ represents hydrogen and the other represents methyl, as well as salts of said compounds and hydrates of said salts.
24. 24) Acyl derivatives as set forth in claim 23/ wherein X represents the 1,2,5,6-tetrahydro-2-methyl-5,6-dioxo-as-15 triazin-3-yl group, as well as salts of said compounds and hydrates of said salts.
25. 25) Acyl derivatives as set forth in claim 23, wherein X represents the 1,4,5,6-tetrahydro-4-methyl-5,6-dioxo-as-triazin-3-yl group, as well as salts of said compounds and 20 hydrates of said salts.
26. 26) (7R)-7-[2-(2-Furyl)-2-(methoxyimino)acetamido]-3- [(1,2,5,6-tetrahydro-2-methyl-5,6-dioxo-as-triazin-3-yl) thio]methyl^-3-cephem^-4-carboxylic acid was well as salts of this compound and hydrates of said salts. ■ate* this x ^ day of hUS ' w OAT Or A. J, PARK * SO^ ♦ 10FEB1984