N-(2-oxooxolan-3-yl)acetamide

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

Procedure: Subsequently the N-acetyl-2-aminobutyrolactone (1 eq) was reacted with various bases in MeSH to give N-acetylmethionine. A mixture of N-acetylaminolactone, base and MeSH (14 eq) was heated in a sealed autoclave. After cooling, expansion and removal of MeSH, the remaining oil was analysed by HPLC. Further details and the yield of N-acetyl-L-methionine achieved are listed in the table below:

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

Procedure: Subsequently the N-acetyl-2-aminobutyrolactone (1 eq) was reacted with various bases in MeSH to give N-acetylmethionine. A mixture of N-acetylaminolactone, base and MeSH (14 eq) was heated in a sealed autoclave. After cooling, expansion and removal of MeSH, the remaining oil was analysed by HPLC. Further details and the yield of N-acetyl-L-methionine achieved are listed in the table below:

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

Procedure: L-Homoserine (2 mol) was suspended in 900 ml of acetic anhydride and admixed with a spatula tip full of dimethylaminopyridine (DMAP). It was slowly heated to 60° C. After approximately 1 hour, the temperature rapidly increased to 100° C. Subsequently the reaction mixture was stirred at 80° C. for 90 minutes and concentrated to dryness under vacuum. The resultant yellow oil was taken up in isopropanol (600 ml) and allowed to stand overnight at 0° C. The resultant crystals were filtered off, washed with cold isopropanol and dried under vacuum. The yield was 60% N-acetyl-2-amino-4-butyrolactone isolated, the purity 99% (according to HPLC). the temperature rapidly increased to 100° C concentrated to dryness under vacuum to stand overnight at 0° C The resultant crystals were filtered off washed with cold isopropanol dried under vacuum

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

Procedure: L-Homoserine (2 mol) was suspended in 900 ml of acetic anhydride and admixed with a spatula tip full of dimethylaminopyridine (DMAP). It was slowly heated to 60° C. After approximately 1 hour, the temperature rapidly increased to 100° C. Subsequently the reaction mixture was stirred at 80° C. for 90 minutes and concentrated to dryness under vacuum. The resultant yellow oil was taken up in isopropanol (600 ml) and allowed to stand overnight at 0° C. The resultant crystals were filtered off, washed with cold isopropanol and dried under vacuum. The yield was 60% N-acetyl-2-amino-4-butyrolactone isolated, the purity 99% (according to HPLC). the temperature rapidly increased to 100° C concentrated to dryness under vacuum to stand overnight at 0° C The resultant crystals were filtered off washed with cold isopropanol dried under vacuum

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

Procedure: L-Homoserine (2 mol) was suspended in 900 ml of acetic anhydride and admixed with a spatula tip full of dimethylaminopyridine (DMAP). It was slowly heated to 60° C. After approximately 1 hour, the temperature rapidly increased to 100° C. Subsequently the reaction mixture was stirred at 80° C. for 90 minutes and concentrated to dryness under vacuum. The resultant yellow oil was taken up in isopropanol (600 ml) and allowed to stand overnight at 0° C. The resultant crystals were filtered off, washed with cold isopropanol and dried under vacuum. The yield was 60% N-acetyl-2-amino-4-butyrolactone isolated, the purity 99% (according to HPLC). the temperature rapidly increased to 100° C concentrated to dryness under vacuum to stand overnight at 0° C The resultant crystals were filtered off washed with cold isopropanol dried under vacuum

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

Procedure: Subsequently the N-acetyl-2-aminobutyrolactone (1 eq) was reacted with various bases in MeSH to give N-acetylmethionine. A mixture of N-acetylaminolactone, base and MeSH (14 eq) was heated in a sealed autoclave. After cooling, expansion and removal of MeSH, the remaining oil was analysed by HPLC. Further details and the yield of N-acetyl-L-methionine achieved are listed in the table below:

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

Procedure: L-Homoserine (2 mol) was suspended in 900 ml of acetic anhydride and admixed with a spatula tip full of dimethylaminopyridine (DMAP). It was slowly heated to 60° C. After approximately 1 hour, the temperature rapidly increased to 100° C. Subsequently the reaction mixture was stirred at 80° C. for 90 minutes and concentrated to dryness under vacuum. The resultant yellow oil was taken up in isopropanol (600 ml) and allowed to stand overnight at 0° C. The resultant crystals were filtered off, washed with cold isopropanol and dried under vacuum. The yield was 60% N-acetyl-2-amino-4-butyrolactone isolated, the purity 99% (according to HPLC). the temperature rapidly increased to 100° C concentrated to dryness under vacuum to stand overnight at 0° C The resultant crystals were filtered off washed with cold isopropanol dried under vacuum