作者:Gunnar Herstad、Tore Benneche
DOI:10.1002/jhet.5570400204
日期:2003.3
Decarboxylation of allylic esters of 4-carboxypyrimidines in toluene at 111 °C in the presence of a Pd(0) catalyst, gives a mixture of a 4-alkenylpyrimidine and a pyrimidine unsubstituted in the 4-position. If the decarboxylation is carried out in the presence of benzaldehyde, then benzaldehyde is added to the 4-position. Decarboxylation of 4-carboxypyrimidines in the presence of different electrophiles
在Pd(0)催化剂存在下,在111°C下于甲苯中将4-羧基嘧啶的烯丙基酯脱羧,得到4-烯基嘧啶和在4-位未被取代的嘧啶的混合物。如果脱羧是在苯甲醛的存在下进行的,则将苯甲醛加到4-位上。在不同亲电试剂存在下4-羧基嘧啶的脱羧,导致亲电试剂与4-位未取代的嘧啶一起掺入4-位。微波辐射的使用提高了脱羧的速率。