Development of Privileged Groebke-Blackburn-Type 4-(3-aminoimidazo [1,2-a]pyridin-2-yl)benzoic Acid Core into a Combinatorial Library on Solid Phase
作者:Yuri Sandulenko、Alexander Komarov、Mikhail Krasavin
DOI:10.2174/157017809789124957
日期:2009.9.1
A library of 4-(3-acyl- or carbamoylaminoimidazo[1,2-a]pyridin-2-yl)benzamides (8) was synthesized on solid phase. A suitably protected core acid (1) was synthesized in multigram quantity using previously published procedure and used as the acylating reagent for modifying a set of AMEBA resins. Subsequent liberation of the amino group (using a novel hydrazine procedure) and its acylation or carbamoylation provided, after cleavage, final products in higher chemical yields and purities compared to known protocols that include formation of the imidazo[1,2-a]pyridine core on solid support.
合成了一系列4-(3-酰基或氨甲酰氨基咪唑[1,2-a]喹啉-2-基)苯胺(8),该系列在固相上合成。使用先前发表的程序合成了一种适当保护的核心酸(1),并将其用作修改一组AMEBA树脂的酰化试剂。随后,利用一种新颖的肼法释放氨基,并进行酰化或氨甲酰化,最终产品在 cleave 后相比于已知的包括在固相上形成咪唑[1,2-a]喹啉核心的程序,获得了更高的化学收率和纯度。