N-Boc-L-色氨酸

二肽的概念与二肽合成的个人心得体会

了一半。刚开始的我不敢向导师提出任何要求，就这样按着老师给的方案(方案是两年前师姐用色氨酸和苏氨酸合成二肽的实验。)开始了，实验方案如下： (1)合成N-Boc-L-Tryptophan色氨酸的合成 在150ml单口瓶中加入2.04g的L-色氨酸，80ml的10%的三乙胺甲醇混合溶液，搅拌溶解。随后加入叔丁氧碳酸酐4.35g，控制温度在55℃以下反应30min。反应完后，有机相减压蒸馏，蒸出大部分的三乙胺甲醇混合溶液。剩余的溶液在冰水浴下用10ml的盐酸酸化至pH=2,再用

Enzymes Acting on d-Amino Acid Containing Peptides

aminopeptidase and endopeptidase activities. The enzyme was active toward (d -Phe) n , Boc-(d -Phe) n , (d -Phe) n methyl ester, d -Phe-NH2 , Boc-(d -Phe) n methyl ester, and Boc-(d -Phe) n tert -butyl ester, but not toward (d -Ala) n (n = 2–4), (d

Synthesis of Peptides Using Tert-Butyloxycarbonyl (Boc) as the -Amino Protection Group

The use of the tert -butyloxycarbonyl (Boc) as the N α-amino protecting group in peptide synthesis can be advantageous in several cases, such as synthesis of hydrophobic peptides and peptides containing ester and thioester moieties