... the conditions described above (R)-β-proline (ent- 12b) and (S)-homo-β-proline (ent-15c) were synthesized from (R ... amino acids, see: (a) Juaristi, E.; Quintana, D.; Escalante, J. Aldrichimica Acta 1994, 27, 3 (b) Enantioselective Synthesis of β ... (10) (a) Dado, GP; Gellman, SH J. Am ...