作者:Bryan Li、Lacey Samp、John Sagal、Cheryl M. Hayward、Christine Yang、Zhijun Zhang
DOI:10.1021/jo302515c
日期:2013.2.1
Pyrido[4,3-d]pyrimidin-4(3H)-one (1) was prepared by reacting 2-trifluoromethyl-4-iodo-nicotinic acid (2) with amidine 9a catalyzed by Pd2(dba)3 and Xantphos, followed by cyclization effected with HBTU and subsequent demethylation using PhBCl2. The amidine arylation method was found applicable for the syntheses of quinazolin-4(3H)-ones. Thus, reaction of 2-bromo or 2-iodo benzoate esters with amdidines
吡啶并[4,3- d ]嘧啶-4(3 H ^) -酮(1)通过反应来制备2-三氟甲基-4-碘-烟酸(2)与脒9A通过Pd催化2(DBA)3和加入Xantphos ,然后用HBTU进行环化,然后使用PhBCl 2脱甲基。发现idine基芳基化方法可用于喹唑啉-4(3 H)-one的合成。因此,将2-溴或2-碘代苯甲酸酯与am反应,可得到取代的喹唑啉-4(3 H)-一,产率为44-89%。