Solid-phase synthesis of 2,6- and 2,7-diamino-4(3H)-quinazolinones via palladium-catalyzed amination
作者:Csaba Wéber、Ádám Demeter、Györgyi I. Szendrei、István Greiner
DOI:10.1016/s0040-4039(03)01876-8
日期:2003.9
A new procedure for the solid-phase synthesis of 2,6- and 2,7-diamino-4(3H)-quinazolinones is described. The method involves coupling of 2,4,6- and 2,4,7-trichloroquinazoline to a solid support via benzyl alcohol type linkers, subsequent displacement of chlorine at C-2 then at the C-6 or C-7 positions by amines ( Fig. 1) and the cleavage of the products from the resin. The palladium-catalyzed amination
描述了一种固相合成2,6-和2,7-二氨基-4(3 H)-喹唑啉酮的新方法。该方法包括将2,4,6-和2,4,7-三氯喹唑啉通过苄醇型接头偶联至固相载体,随后在C-2处取代氯,然后在C-6或C-7处被胺取代(图1)和从树脂上裂解产物。C-6和C-7位的钯催化胺化,在2-(二-的存在一组代表性的胺的吨-butylphosphino)联苯(DTBPBP),P(吨-Bu)3和2,2'已经研究了-双(二苯基膦基)-1,1'-联萘(BINAP)配体。该方法应被证明是构建包含4(3 H)-喹唑啉酮部分。