N-BOC-DL-serine methyl ester is a Serine derivative. N-BOC-DL-serine methyl ester is used for the synthesis of α,β-dehydro-α-amino acid. N-BOC-DL-serine methyl ester is also used for the synthesis of anti-cancer agent, such as quinazolinone derivative that inhibits PI3K activity, and tricyclic pyrolopyranopyridines that inhibits protein kinase activity.