The present invention relates to a liquid (or solution)-phase manufacturing process for preparing the decapeptide Degareiix, its amino-protected precursor, and other useful intermediates. The invention further relates to polypeptides useful in the solution-phase manufacturing process and to the purification of Degareiix itself. The manufacturing process comprises the step of cleaving the ε-amino protecting group Pε from a Degareiix precursor according to formula P
4
)(Pε)Ac-AA
1
-AA
10
-NH
2
in an organic solvent comprising the precursor and a cleaving agent dissolved therein: wherein P
4
is a hydroxyl-protecting group or hydrogen, preferably hydrogen.
本发明涉及一种制备十肽Degareiix及其
氨基保护前体和其他有用中间体的液相(或溶液)制造工艺。本发明还涉及在溶液相制造工艺中有用的
多肽以及Degareiix本身的纯化。制造工艺包括从Degareiix前体中剖离出ε-
氨基保护基Pε的步骤,其
化学式为P4)(Pε)Ac-
AA1-
AA10-NH2,在包含前体和剖离剂的有机溶剂中:其中P4是羟基保护基或氢,优选是氢。