Amino acids and peptides. VII. Synthesis of methionine-enkephalin using transfer hydrogenation.
作者:YOSHIO OKADA、NORIYA OHTA
DOI:10.1248/cpb.30.581
日期:——
Catalytic transfer hydrogenation was examined with several proton donors for removal of the Z group from Z-Met-OBut. cis-Decalin as well as cyclohexene was a good proton donor for transfer hydrogenation. Met-enkephalin was synthesized by the same route as Leu-enkephalin in combination with Z group and tert-butyl ester group for protection, with removal of the Z group by transfer hydrogenation. The biological activity of the synthetic peptides as determined by measuring the inhibition of electrically evoked contraction of the guinea pig ileum was in good agreement with the results reported with the natural materials, indicating that this method may be useful for the synthesis of Metcontaining biologically active peptides.
催化的转移氢化作用通过对几种质子供体的研究,用于去除Z-Met-OBut中的Z基团。顺式十氢化萘以及环己烯是转移氢化的良好质子供体。Met-脑啡肽通过与Leu-脑啡肽相同的路径合成,结合Z基团和叔丁酯基团进行保护,通过转移氢化去除Z基团。通过测量电刺激引起豚鼠回肠收缩的抑制作用来确定合成肽的生物活性,结果与天然物质的报道结果吻合良好,表明这种方法可能对合成含Met的生物活性肽有用。