Structural studies on bio-active compounds. Part 5. Synthesis and properties of 2,4-diaminopyrimidine dihydrofolate reductase inhibitors bearing lipophilic azido groups
作者:Edward A. Bliss、Roger J. Griffin、Malcolm F. G. Stevens
DOI:10.1039/p19870002217
日期:——
A series of 2,4-diamino-5-(azidoaryl)-6-alkylpyrimidines has been prepared. The azide (36)(MZP) can be reduced by thiol reagents to the corresponding amine (28) but reductive deazidation occurred when the series of azidophenyl derivatives was heated with hydrazine hydrate. Degradation of azide (36) in a trifluoroacetic acid–trifluoromethanesulphonic acid mixture at 0 °C affords a means of introducing
已经制备了一系列的2,4-二氨基-5-(叠氮芳基)-6-烷基嘧啶。叠氮化物(36)(MZP)可以通过硫醇试剂还原为相应的胺(28),但是当一系列叠氮基苯基衍生物与水合肼一起加热时,会发生还原脱叠作用。在三氟乙酸-三氟甲磺酸混合物中于0°C降解叠氮化物(36)提供了一种将庞大的三氟甲基磺酰氧基取代基引入到5-芳基取代基的受阻邻位中的方法。由叠氮化物(36)和平面类似物2,4-二氨基-6-叠氮喹啉(70)的热解和光解形成的产物)衍生自三重态腈反应性中间体。