Development of a Practical Synthesis of a Functionalized Pyrrolo[2,1-f][1,2,4]triazine Nucleus
作者:Bin Zheng、David A. Conlon、R. Michael Corbett、Melissa Chau、Dau-Ming Hsieh、Agnes Yeboah、Daniel Hsieh、Jale Müslehiddinoğlu、William P. Gallagher、Jeffrey N. Simon、Justin Burt
DOI:10.1021/op300252n
日期:2012.11.16
Functionalized pyrrolotriazine 1b is a key heterocyclic building block in the synthesis of BMS-690514, a potent anticancer agent. Described herein are our development activities that led to the efficient preparation of 1b on a large scale. The key transformations include a selective C-alkylation of an oxalacetate salt with a hydrazonyl bromide to form a 2-hydrazonoethyl-3-oxosuccinate, followed by
功能化的吡咯并三嗪1b是BMS-690514(一种有效的抗癌药)的合成中的关键杂环结构单元。在此描述的是我们的开发活动,该活动导致了大规模有效制备1b的过程。关键的转化包括草酰乙酸盐与酰肼基溴的选择性C-烷基化反应,以生成2-肼基乙基-3-氧代琥珀酸酯,然后环脱水为氨基吡咯。随后脱保护并与甲am缩合,得到吡咯并三嗪支架。对该核的进一步加工提供了所需的吡咯并恶嗪基胺。