sodium;N-methylcarbamodithioate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In 3 ml of dimethylformamide was dissolved 170 mg of the Compound (9a) obtained as above. To the solution was added, under ice-cooling, 48 mg of sodium N-methyldithiocarbamate, and the mixture was stirred at room temperature for one hour. The reaction solution was poured into water, which was subjected to extraction with ethyl acetate. The ethyl acetate layer was washed with water, dried over anhydrous magnesium sulfate, then concentrated under reduced pressure. The concentrate was subjected to a silica-gel column chromatography, eluting with ethyl acetate - n-hexane (2:1) to give 115 mg of the above-titled Compound (9b). obtained as above To the solution was added, under ice- cooling was subjected to extraction with ethyl acetate The ethyl acetate layer was washed with water dried over anhydrous magnesium sulfate concentrated under reduced pressure eluting with ethyl acetate - n-hexane (2:1)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In 5 ml of anhydrous N,N-dimethylformamide was dissolved 0.334 g of the compound obtained in Example 16, to which was added 0.132 g of sodium N-methyldithiocarbamate, folowed by stirring at room temperature for 1.5 hour. To the reaction mixture was added 30 ml of ethyl acetate, which was washed with water and then dried (MgSO4). The solvent was distilled off under reduced pressure, and the residue was subjected to a silica gel column chromatography, followed by elution with ethyl acetate-chloroform-methanol (15:15:1). Fractions containing the end product were combined and concentrated under reduced pressure to give 0.206 g of the subject compound as powders. was washed with water dried (MgSO4) The solvent was distilled off under reduced pressure followed by elution with ethyl acetate-chloroform-methanol (15:15:1) Fractions containing the end product concentrated under reduced pressure

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In 500 ml of a (1:1) mixture of water and THF was suspended 11.9 g of 7β-amino-3-hydroxymethyl-3-cephem-4-carboxylic acid, and 19.4 g of sodium hydrogencarbonate was added under ice-cooling and stirring. To the suspension was added 20.6 g of 2-(2-chloroacetamidothiazol-4-yl)-(Z)-2-methoxyiminoacetyl chloride hydrochloride, followed by stirring for 30 minutes. The reaction mixture was shaken with 100 ml of water and 150 ml of ethyl acetate. The aqueous layer was taken and adjusted to pH 7.0 with 1N-hydrochloric acid under ice-cooling and stirring. To the mixture was gradually added 12.0 g of sodium N-methyldithiocarbamate at room temperature under stirring to remove the amino group. After shaking with 200 ml of ethyl acetate, the aqueous layer was taken and concentrated to 50 ml under reduced pressure. The residue was subjected to a column chromatography on XAD-II (1.2l) eluting with water. The fractions containing the objective compound were collected, concentrated under reduced pressure, and then lyophilized to give 12.4 g of sodium 7β-[2-(2-aminothiazol-4-yl)-(Z)-2-methoxyiminoacetamido]-3-hydroxymethyl-3-cephem-4-carboxylate as pale yellow powders. was added under ice- cooling by stirring for 30 minutes cooling stirring at room temperature under stirring to remove the amino group After shaking with 200 ml of ethyl acetate concentrated to 50 ml under reduced pressure eluting with water The fractions containing the objective compound were collected concentrated under reduced pressure

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In 500 ml of a (1:1) mixture of water and THF was suspended 11.9 g of 7β-amino-3-hydroxymethyl-3-cephem-4-carboxylic acid, and 19.4 g of sodium hydrogencarbonate was added under ice-cooling and stirring. To the suspension was added 20.6 g of 2-(2-chloroacetamidothiazol-4-yl)-(Z)-2-methoxyiminoacetyl chloride hydrochloride, followed by stirring for 30 minutes. The reaction mixture was shaken with 100 ml of water and 150 ml of ethyl acetate. The aqueous layer was taken and adjusted to pH 7.0 with 1N-hydrochloric acid under ice-cooling and stirring. To the mixture was gradually added 12.0 g of sodium N-methyldithiocarbamate at room temperature under stirring to remove the amino group. After shaking with 200 ml of ethyl acetate, the aqueous layer was taken and concentrated to 50 ml under reduced pressure. The residue was subjected to a column chromatography on XAD-II (1.2l) eluting with water. The fractions containing the objective compound were collected, concentrated under reduced pressure, and then lyophilized to give 12.4 g of sodium 7β-[2-(2-aminothiazol-4-yl)-(Z)-2-methoxyiminoacetamido]-3-hydroxymethyl-3-cephem-4-carboxylate as pale yellow powders. was added under ice- cooling by stirring for 30 minutes cooling stirring at room temperature under stirring to remove the amino group After shaking with 200 ml of ethyl acetate concentrated to 50 ml under reduced pressure eluting with water The fractions containing the objective compound were collected concentrated under reduced pressure

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In 3 ml of water is dissolved 0.204 g of the above sodium 3-[2-[2-(2-chloroacetamido-4-thiazolyl)-2-methoxyiminoacetamido]-2-(2-chloroacetamido-4-thiazolyl)acetamido]-2-oxoazetidine-1-sulfonate (syn-isomer) and while the solution is stirred under ice-cooling, 0.085 g of sodium N-methyldithiocarbamate is added. The mixture is stirred for an hour, after which the insoluble matter is filtered off. The filtrate is purified by Amberlite XAD-II chromatography to provide 0.1 g of sodium 3-[2-[2-(2-amino-4-thiazolyl)-2-methoxyiminoacetamido]-2-(2-amino-4-thiazolyl)acetamido]-2-oxoazetidine-1-sulfonate (syn-isomer). cooling The mixture is stirred for an hour after which the insoluble matter is filtered off The filtrate is purified by Amberlite XAD-II chromatography

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The crude sodium 3-[2-(2-chloroacetamido-4-thiazolyl)-2-methoxyiminoacetamido]-2-oxoazetidine-1-sulfonate (syn-isomer) obtained above (0.556 g) is dissolved in 8 ml of water, and to the solution is added 0.172 g of sodium N-methyldithiocarbamate under ice-cooling and stirring. The mixture is stirred for 3 hours, after which any insoluble matter is filtered off. The filtrate is purified by XAD-II chromatography to yield 0.174 g of sodium 3-[2-(2-amino-4-thiazolyl)-2-methoxyiminoacetamido]-2-oxoazetidine-1-sulfonate (syn-isomer). cooling The mixture is stirred for 3 hours after which any insoluble matter is filtered off The filtrate is purified by XAD-II chromatography

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of 13 ml of water and 13 ml of tetrahydrofuran is dissolved 2.94 g of 7β-[2-(5-chloro-2-chloroacetamidothiazol-4-yl)-2(Z)-methoxyiminoacetamido]-3-(3-oxobutyryloxymetyl)-3-cephem-4-carboxylic acid. To the mixture is added 1.15 g of sodium N-methyldithiocarbamate in 3 portions with stirring at room temperature for 3 hours. Ethyl acetate is added to the reaction mixture and the ethyl acetate layer is separated and discarded. The aqueous layer is acidified with concentrated hydrochloric acid and extracted with 200 ml of methyl ethyl ketone. The extract is washed with aqueous sodium chloride solution and dried over anhydrous sodium sulfate. The solvent is then evaporated off to give 2.28 g of the above-identified compound. the ethyl acetate layer is separated extracted with 200 ml of methyl ethyl ketone The extract is washed with aqueous sodium chloride solution dried over anhydrous sodium sulfate The solvent is then evaporated off

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of 13 ml of water and 13 ml of tetrahydrofuran is dissolved 2.94 g of 7β-[2-(5-chloro-2-chloroacetamidothiazol-4-yl)-2(Z)-methoxyiminoacetamido]-3-(3-oxobutyryloxymetyl)-3-cephem-4-carboxylic acid. To the mixture is added 1.15 g of sodium N-methyldithiocarbamate in 3 portions with stirring at room temperature for 3 hours. Ethyl acetate is added to the reaction mixture and the ethyl acetate layer is separated and discarded. The aqueous layer is acidified with concentrated hydrochloric acid and extracted with 200 ml of methyl ethyl ketone. The extract is washed with aqueous sodium chloride solution and dried over anhydrous sodium sulfate. The solvent is then evaporated off to give 2.28 g of the above-identified compound. the ethyl acetate layer is separated extracted with 200 ml of methyl ethyl ketone The extract is washed with aqueous sodium chloride solution dried over anhydrous sodium sulfate The solvent is then evaporated off

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In 3 ml of water is dissolved 0.204 g of the above sodium 3-[2-[2-(2-chloroacetamido-4-thiazolyl)-2-methoxyiminoacetamido]-2-(2-chloroacetamido-4-thiazolyl)acetamido]-2-oxoazetidine-1-sulfonate (syn-isomer) and while the solution is stirred under ice-cooling, 0.085 g of sodium N-methyldithiocarbamate is added. The mixture is stirred for an hour, after which the insoluble matter is filtered off. The filtrate is purified by Amberlite XAD-II chromatography to provide 0.1 g of sodium 3-[2-[2-(2-amino-4-thiazolyl)-2-methoxyiminoacetamido]-2-(2-amino-4-thiazolyl)acetamido]-2-oxoazetidine-1-sulfonate (syn-isomer). cooling The mixture is stirred for an hour after which the insoluble matter is filtered off The filtrate is purified by Amberlite XAD-II chromatography

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In 3 ml of water is dissolved 0.204 g of the above sodium 3-[2-[2-(2-chloroacetamido-4-thiazolyl)-2-methoxyiminoacetamido]-2-(2-chloroacetamido-4-thiazolyl)acetamido]-2-oxoazetidine-1-sulfonate (syn-isomer) and while the solution is stirred under ice-cooling, 0.085 g of sodium N-methyldithiocarbamate is added. The mixture is stirred for an hour, after which the insoluble matter is filtered off. The filtrate is purified by Amberlite XAD-II chromatography to provide 0.1 g of sodium 3-[2-[2-(2-amino-4-thiazolyl)-2-methoxyiminoacetamido]-2-(2-amino-4-thiazolyl)acetamido]-2-oxoazetidine-1-sulfonate (syn-isomer). cooling The mixture is stirred for an hour after which the insoluble matter is filtered off The filtrate is purified by Amberlite XAD-II chromatography

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The crude sodium 3-[2-(2-chloroacetamido-4-thiazolyl)-2-methoxyiminoacetamido]-2-oxoazetidine-1-sulfonate (syn-isomer) obtained above (0.556 g) is dissolved in 8 ml of water, and to the solution is added 0.172 g of sodium N-methyldithiocarbamate under ice-cooling and stirring. The mixture is stirred for 3 hours, after which any insoluble matter is filtered off. The filtrate is purified by XAD-II chromatography to yield 0.174 g of sodium 3-[2-(2-amino-4-thiazolyl)-2-methoxyiminoacetamido]-2-oxoazetidine-1-sulfonate (syn-isomer). cooling The mixture is stirred for 3 hours after which any insoluble matter is filtered off The filtrate is purified by XAD-II chromatography

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In 3 ml of water is dissolved 0.204 g of the above sodium 3-[2-[2-(2-chloroacetamido-4-thiazolyl)-2-methoxyiminoacetamido]-2-(2-chloroacetamido-4-thiazolyl)acetamido]-2-oxoazetidine-1-sulfonate (syn-isomer) and while the solution is stirred under ice-cooling, 0.085 g of sodium N-methyldithiocarbamate is added. The mixture is stirred for an hour, after which the insoluble matter is filtered off. The filtrate is purified by Amberlite XAD-II chromatography to provide 0.1 g of sodium 3-[2-[2-(2-amino-4-thiazolyl)-2-methoxyiminoacetamido]-2-(2-amino-4-thiazolyl)acetamido]-2-oxoazetidine-1-sulfonate (syn-isomer). cooling The mixture is stirred for an hour after which the insoluble matter is filtered off The filtrate is purified by Amberlite XAD-II chromatography