How is (6R,7S)-7-({N-[(4-Ethyl-2,3-dioxo-1-piperazinyl)carbonyl]-D-threonyl}amino)-7-methoxy-3-{[(1-methyl-1H-tetrazol-5-yl)sulfanyl]methyl}-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid (CAS: 76610-84-9) typically synthesized?

This compound is typically synthesized through peptide coupling reactions, utilizing D-threonyl chloride and a piperazine derivative as key reactants. The synthesis involves multi-step processes including peptide assembly, N-methylation, and sulfenylation. High purity can be achieved with selectivity up to 98%, and a yield of around 70% is common.