A process for the preparation of a salt of 5-phenylpentanoyl-(S)-arginyl-(S)-alanyl-{(S)-2-[(R)-3-amino-2-oxopyrrolidin-1-yl]propionyl}-(S)-alanyl-(S)-arginyl-(S)-alanyl-4-aminophenylacetamide (SEQ ID NO: 1) which comprises deprotection of a compound of the formula II or a salt thereof: wherein Pg and R
1
are defined in the description. Also claimed are intermediates used in the process and the processes for the preparation of the intermediates.
一种制备5-
苯基戊酰-(S)-精
氨酰-(S)-丙
氨酰-{(S)-2-[(R)-3-
氨基-2-
氧代
吡咯啉-1-基]丙酰基}-(S)-丙
氨酰-(S)-精
氨酰-(S)-丙
氨酰-4-
氨基
苯乙
酰胺(
SEQ ID NO: 1)的盐的方法,包括去保护化合物II的过程或其盐:其中Pg和R1在说明书中定义。还声明了在该过程中使用的
中间体和制备
中间体的过程。