ethyl iodomethyl carbonate

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

Procedure: In the same manner as in Example 81, 203 mg of the title compound was prepared from 214 mg of sodium (1R,5S,6S)-6-((1R)-1-hydroxyethyl)-2-[[(Z)-2-(4-hydroxymethylthiazol-5-yl)ethen-1-yl]thio]-1-methyl-1-carbapen-2-em-3-carboxylate and 146 mg of ethoxycarbonyloxymethyl iodide.

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of 1-[(1R,2R)-2-(2,4-difluorophenyl)-2-hydroxy-1-methyl-3-(1H-1,2,4-triazol-1-yl)propyl]-3-[4-(1H-tetrazol-1-yl)phenyl]-2-imidazolidinone(1.31 g) and ethyl iodomethyl carbonate (1.25 g) was added acetonitrile (20 ml) and the mixture was stirred for 14 hours at 60° C. under an argon atmosphere. The reaction mixture was concentrated under reduced pressure and the residue was submitted to silica gel flush chromatography (eluent: ethyl acetate→acetone→acetone/ethanol=4/1). The fraction containing the desired compound was concentrated under reduced pressure. The residue was subjected to ODS column chromatography (eluent: methanol/water=3/2) to give 1-[(2R,3R)-2-(2,4-difluorophenyl)-2-hydroxy-3-[2-oxo-3-[4-(1H-tetrazol-1-yl)phenyl]-1-imidazolidinyl]butyl]-4-ethoxycarbonyloxymethyl-1H-1,2,4-triazolium iodide (Compound 17, 1.1 g) as a pale yellow powder. The reaction mixture was concentrated under reduced pressure flush chromatography (eluent: ethyl acetate→acetone→acetone/ethanol=4/1) The fraction containing the desired compound was concentrated under reduced pressure

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

Procedure: In the same manner as in Example 81, 203 mg of the title compound was prepared from 214 mg of sodium (1R,5S,6S)-6-((1R)-1-hydroxyethyl)-2-[[(Z)-2-(4-hydroxymethylthiazol-5-yl)ethen-1-yl]thio]-1-methyl-1-carbapen-2-em-3-carboxylate and 146 mg of ethoxycarbonyloxymethyl iodide.

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of 1-[(1R,2R)-2-(2,4-difluorophenyl)-2-hydroxy-1-methyl-3-(1H-1,2,4-triazol-1-yl)propyl]-3-[4-(1H-tetrazol-1-yl)phenyl]-2-imidazolidinone(1.31 g) and ethyl iodomethyl carbonate (1.25 g) was added acetonitrile (20 ml) and the mixture was stirred for 14 hours at 60° C. under an argon atmosphere. The reaction mixture was concentrated under reduced pressure and the residue was submitted to silica gel flush chromatography (eluent: ethyl acetate→acetone→acetone/ethanol=4/1). The fraction containing the desired compound was concentrated under reduced pressure. The residue was subjected to ODS column chromatography (eluent: methanol/water=3/2) to give 1-[(2R,3R)-2-(2,4-difluorophenyl)-2-hydroxy-3-[2-oxo-3-[4-(1H-tetrazol-1-yl)phenyl]-1-imidazolidinyl]butyl]-4-ethoxycarbonyloxymethyl-1H-1,2,4-triazolium iodide (Compound 17, 1.1 g) as a pale yellow powder. The reaction mixture was concentrated under reduced pressure flush chromatography (eluent: ethyl acetate→acetone→acetone/ethanol=4/1) The fraction containing the desired compound was concentrated under reduced pressure