How is S-A-1 (CAS: 216454-90-9) typically synthesized?

S-A-1 is synthesized via a multistep process involving condensation reactions and derivatization steps. Commonly, it is prepared from readily available starting materials using a combination of organic solvents and catalysts. The synthesis typically yields a high purity product with good selectivity and yield, though specific details can vary depending on the exact route chosen.