Selective BH3-Reduction of Amide Carbonyl Groups of Lithium Salts of N-t-Butoxycarbonyl (S)-O-Benzyl Tyrosyl (S)-Proline and N,N′-Ethylene-Bridged Dipeptides - Adachi, Kenichi; Tsuru, Eiji; Banjyo, Eri; Doe, Matsumi; Shibata, Kozo; Yamashita, Tetsushi (Synthesis, 1998)