Development of a new synthesis of 3-(1<i>H</i>-tetrazol-5-yl)-4(3<i>H</i>)-quinazolinone, sodium salt<i>via</i>an amidine intermediate
作者:Anna P. Vinogradoff、Norton P. Peet
DOI:10.1002/jhet.5570260118
日期:1989.1
experimental mediator release inhibitor, was developed from: (1) reaction of 5-aminotetrazole 3 and triethyl orthoformate 6 to give ethyl N-(1H-tetrazol-5-yl)formimidate 8, (2) reaction of methyl anthranilate and imidate 8 to give amidine 11, and (3) treatment of 11 with base to give 1. Investigation of each of these steps independently led to a significantly more efficient, facile and higher-yielding 1-pot
一种新合成的最近报道的3-(1 H-四唑-5-基)-4(3 H)-喹唑啉酮钠盐(1,MDL-427),一种实验性介质释放抑制剂,是由以下物质开发的:(1的)反应5-氨基四唑3和原甲酸三乙酯6,得到乙基ñ - (1 ħ -四唑-5-基)甲亚胺8,的邻氨基苯甲酸甲酯和亚氨酸酯(2)反应8,得到脒11,和(3)治疗的11加底为1。对这些步骤中的每一个进行独立的研究,就可以使制浆过程更加高效,便捷和高产。在此过程中,对邻氨基苯甲酸13及其盐和衍生物14至17进行了简短检查,发现它们具有不同的反应性。作为可分离的中间体的am 11的形成是不寻常的,在标准的中性或酸性条件下环化失败也是不寻常的。实现环化的碱基对11的绝对要求似乎是空前的。