1. 1) The following abbreviations are used: Z(OMe)=p-methoxybenzyloxycarbonyl, OPCP=pentachlorophenyl ester, OTCP=2,4,5-trichlorophenyl ester, OSu=N-hydroxysuccinimide ester, ONP=p-nitrophenyl ester, ONB=N-hydroxy-5-norbornene-2,3-dicarboximide ester, Met-ol=methioninol, Mts=mesitylene-2-sulfonyl, CHA=cyclohexylamine, DCC=dicyclohexylcarbodiimide, THF=tetrahydrofuran.
2. 2) H. Seki, K. Koga, H. Matsuo, S. Ohki, I. Matsuo, and S. Yamada, Chem. Pharm. Bull., 13, 995 (1965).
3. 3) K. Ishizumi, K. Koga, and S. Yamada, Chem. Pharm. Bull., 16, 492 (1968).
4. 4) S. Yamada, Yuki Gosei Kagaku Kyokai Ski, 28, 1083 (1970).
5. 5) S.W. Chaikin and W.G. Brown, J. Am. Chem. Soc., 71, 122 (1949).