Solution-Phase Synthesis of an Anti-human Immunodeficiency Virus Peptide, T22 ((Tyr5,12, Lys7)-Polyphemusin II), and the Modification of Trp by the p-Methoxybenzyl Group of Cys during Trimethylsilyl Trifluoromethanesulfonate Deprotection.
作者:Hirokazu TAMAMURA、Akira OTAKA、Wataru TAKADA、Yoshihiro TERAKAWA、Hidenori YOSHIZAWA、Masao MASUDA、Toshiro IBUKA、Tsutomu MURAKAMI、Hideki NAKASHIMA、Michinori WAKI、Akiyoshi MATSUMOTO、Naoki YAMAMOTO、Nobutaka FUJII
DOI:10.1248/cpb.43.12
日期:——
was found to have a strong anti-human immunodeficiency virus (HIV) activity, comparable to that of 3'-azido-2',3'-dideoxy-thymidine (AZT). In the present study, the solution-phase synthesis of T22 was attempted in order to produce this peptide on a large scale. An 18-residue peptide amide corresponding to the entire amino acid sequence of T22 was synthesized by assembling four peptide fragments and
T22([Tyr5,12,Lys7] -polyphemusin II)以前是通过固相方法合成的,被发现具有很强的抗人类免疫缺陷病毒(HIV)活性,与3'-azido-2'相当,3′-二脱氧胸苷(AZT)。在本研究中,为了大规模生产该肽,尝试了T22的溶液相合成。通过组装四个肽片段和两个氨基酸衍生物,然后在三氟乙酸中用1 M三甲基甲硅烷基三氟甲磺酸酯(TMSOTf)进行硫代苯甲醚介导的脱保护,然后进行空气氧化,合成了对应于T22整个氨基酸序列的18个残基的肽酰胺。 。在解除保护的过程中,形成了明显的副产物,该副产物源自对甲氧基苄基(MBzI)从半胱氨酸残基的巯基转移至色氨酸残基的侧链。发现通过采用三氟甲磺酸银(AgOTf)-TMSOTf或三甲基甲硅烷基溴化物(TMSBr)-TMSOTf的两步脱保护程序可有效抑制该副反应。