An efficient method for the synthesis of phenacyl ester-protected dipeptides using neutral alumina-supported sodium carbonate %26quot;Na2CO3/n-Al2O3%26apos;

作者：Hashimoto Chikao^*; Sugimoto Kazuhiro; Takahashi Youhei; Kodomari Mitsuo

来源：Journal of Peptide Science, 2013, 19(10): 659-662.

DOI：10.1002/psc.2544

• neutral alumina-supported sodium carbonate
• solid base
• phenacyl ester
• peptide synthesis
• amine

In the synthesis of dipeptides (Boc-AA(1)-AA(2)-OPac: AA(1) and AA(2) represent amino acids) protected by phenacyl (Pac) ester, amines and solid bases as the base for the conversion of the trifluoroacetic acid (TFA) salt of the amino component (TFA center dot H-AA(2)-OPac) into the corresponding free amino component (H-AA(2)-OPac) were examined. The synthesis of a dipeptide (Boc-Ala-Gly-OPac) using amines for the conversion afforded an unsatisfactory yield with by-products. On the other hand, the use of neutral alumina-supported Na2CO3 (Na2CO3/n-Al2O3) as a solid base for the conversion provided the dipeptide in a quantitative yield without by-products. The application of Na2CO3/n-Al2O3 to the synthesis of some dipeptides protected by Pac ester gave the desired peptides in excellent yields.

• 出版日期2013-10