A new class of nitrosoureas. I. Synthesis and antitumor activity of 1-(2-chloroethyl)-3,3-disubstituted-1-nitrosoureas having a hydroxyl group at the .BETA.-position of the substituents.
作者:KENJI TSUJIHARA、MASAKATSU OZEKI、TAMIO MORIKAWA、YOSHIHISA ARAI
DOI:10.1248/cpb.29.2509
日期:——
1-(2-Chloroethyl)-3, 3-disubstituted-1-nitrosoureas (5a-m), a new class of nitrosoureas, were synthesized and tested for antitumor activities against leukemia L1210 and Ehrlich ascites carcinoma. The nitrosoureas (5e-k) having a hydroxyl group at the β-position of the substituents showed remarkable antitumor activities. In particular, 1-(2-chloroethyl)-3, 3-bis (2-hydroxyethyl)-1-nitrosourea (5k) had excellent activities and showed 5 and 16 times greater therapeutic ratios than 1-(2-chloroethyl)-3-cyclohexyl-1-nitrosourea against leukemia L1210 and Ehrlich ascites carcinoma, respectively. These nitrosoureas (5e-k) appear to be activated nonenzymatically by attack of the hydroxyl group on the carbonyl group to give the oxazolidinones (6) and chloroethyl diazohydroxide (7) without generation of the isocyanates (8).
一种新型的亚硝基脲类化合物,1-(2-氯乙基)-3,3-二取代-1-亚硝基脲(5a-m),被合成并测试了其对白血病L1210和艾氏腹水癌的抗癌活性。在取代基的β位具有羟基的亚硝基脲(5e-k)显示出显著的抗癌活性。特别是,1-(2-氯乙基)-3,3-双(2-羟乙基)-1-亚硝基脲(5k)具有优异的活性,其治疗比率分别是1-(2-氯乙基)-3-环己基-1-亚硝基脲对白血病L1210和艾氏腹水癌的5倍和16倍。这些亚硝基脲(5e-k)似乎是通过羟基对羰基的非酶促攻击而被激活,产生恶唑烷酮(6)和氯乙基二氮氧化物(7),而不生成异氰酸酯(8)。