作者:B.R. Baker、Beng-Thong Ho
DOI:10.1002/jps.2600560105
日期:1967.1
inactivated dihydrofolic reductase when incubated with the enzyme; this lack of active-site-directed irreversible inhibition by compounds of type IV has been attributed to the complexing of the phenyl group to the hydrophobic bonding region on dihydrofolic reductase—a region not apt to have attackable nucleophilic groups present.
4,4,6-二氨基-1,2-二氢-2,2-二甲基-1-苯基-s-三嗪在苯环上被对氯乙酰基(IV a),间氯乙酰基(IV c)和4-由适当的芳族胺盐酸盐,氰基胍和丙酮合成了氯-3-丁酮-1-基(IV b)基团。所有这三种化合物都是二氢叶酸还原酶的良好可逆抑制剂。然而,当与该酶一起孵育时,这三种化合物均未使二氢叶酸还原酶失活。IV型化合物对活性位点的不可逆抑制的缺乏归因于苯基与二氢叶酸还原酶上的疏水键合区域的络合-该区域不易于存在可攻击的亲核基团。