The present invention relates to a method of improving the resistance of a peptide or peptidomimetic to degradation by trypsin which comprises incorporating into said peptide or peptidomimetic a C-terminal capping group of formula (I): X—Y—Z (I) wherein X is a N atom, which may be substituted by a branched or unbranched C1-C10 alkyl or aryl group which group may incorporate up to 2 heteroatoms selected from N, O and S; Y represents a group selected from —Ra—Rb—, —Ra—Rb—Rb,- and —Rb—Rb—Ra— wherein Ra is C, O, S or N, and Rb is C; each of Ra and Rb, may be substituted by C1-C4 alkyl groups or unsubstituted; and Z is a group comprising 1 to 3 cyclic groups each of 5 or 6 non-hydrogen atoms, 2 or more of the cyclic groups may be fused and one or more of the cyclic groups may be substituted; the Z. moiety incorporates a maximum of 15 non-hydrogen atoms; and wherein the bond between Y and Z is a covalent bond between Ra or Rb of Y and a non-hydrogen atom of one of the cyclic groups of Z.
本发明涉及一种改善肽或肽类似物对胰
蛋白酶降解抗性的方法,包括将式(I)的C-末端封端基团(C-terminal capping group)引入到所述肽或肽类似物中:X—Y—Z(I),其中X是一个N原子,可能被一种支链或非支链的C1-C10烷基或芳基取代,该基团可包含最多2个从N、O和S中选择的杂原子;Y代表从—Ra—Rb—、—Ra—Rb—Rb-和—Rb—Rb—Ra—中选择的一个基团,其中Ra是C、O、S或N,Rb是C;每个Ra和Rb可能被C1-C4烷基基团或未取代基团取代;Z是一个包含1至3个每个由5或6个非氢原子组成的环基团的基团,其中2个或更多的环基团可以融合,一个或多个环基团可以被取代;Z基团包含最多15个非氢原子;并且Y和Z之间的键是Y的Ra或Rb与Z的一个环基团的非氢原子之间的共价键。