Studies on Amino Acids and Peptides, 11. Synthesis of Four MIF Analogues Containing an N-Terminal (S)-5-Thioxoprolyl Residue
作者:Torben P. Andersen、Alexander Senning
DOI:10.1002/jlac.198719870110
日期:1987.1.31
The newly synthesized amino acid (S)-5-thioxoproline ((S)-Top-OH) (1) has been coupled with HCl · H-(S)-Leu-GlyNRR′ 6 by the mixed anhydride method. The resulting tripeptide amides (S)-Top-(S)-Leu-GlyNRR′ 7 are new analogues of the hypothalamic factor MIF. The intermediates 6 were synthesized by aminolysis of Boc-(S)-Leu-GlyOEt with the corresponding amine HNRR′ followed by removal of the Boc group
新合成的氨基酸(小号)-5- thioxoproline((小号)机顶-OH)(1)已被耦合用HCl·H-(小号)-Leu-GlyNRR' 6通过混合酐方法。将得到的三肽酰胺(小号)-Top-(小号)-Leu-GlyNRR' 7是下丘脑因子MIF的新类似物。通过Boc-(S)-Leu-GlyOEt与相应的胺HNRR'的氨解反应,然后用4 M HCl /二恶烷除去Boc基团来合成中间体6。在7的两个合成中,相应的N-羧化三肽酰胺8分离出氯仿,即氯甲酸异丁酯与1反应。减少氯甲酸异丁酯的使用量和活化时间会减少所形成的8的量。
LARSEN, CLAUS;KRAGH, HENRIK;RASMUSSEN, PREBEN B.;ANDERSEN, TORBEN P.;SENN+, LIEBIGS ANN. CHEM.,(1989) N, C. 819-823