Agmatine and hirudonine, guanidine derivatives of putrescine and spermidine, respectively, are synthesised by the application of a new protecting group strategy for polyamines, which uses N-nitroguanidinyl as a precursor of guanidine functions and selectively blocks spermidine at N-1 and N-8 with trifluoroacetyl and at N-4 by 4-azidobenzyloxycarbonyl.
从
尸胺和
亚精胺分别合成的阿基美汀和
水蛭素是通过采用一种新的聚胺保护基团策略实现的,该策略使用N-硝基
氨基
脲作为
氨基功能的前体,并选择性地在N-1和N-8位用三
氟乙酰基保护
亚精胺,而在N-4位用4-
叠氮苯甲氧羰基进行保护。