An enantioselective totalsynthesis of (−)-agelastatin A from (−)-2,3-O-isopropylidene-d-threitol is described. The sequential Overman/Mislow−Evans rearrangement of the allylic bistrichloroimidate is the key step, which efficiently installed a diaminohydroxy group.
Synthesis of Novel Pyrazine-Substituted 1H-Pyrrole-2-carboxamides and Related Tethered Heterocycles
作者:Rachel L. Howells、Scott G. Lamont、Thomas M. McGuire、Samantha Hughes、Rachel Borrows、Gary Fairley、Lyman J. L. Feron、Ryan D. R. Greenwood、Eva Lenz、Emma Grant、Iain Simpson
DOI:10.1055/s-0040-1719873
日期:2022.5
discovery program, 4-pyrazin-2-yl-1H-pyrrole-2-carboxamides were accessed along with a number of bicyclic analogues. Routes to these compounds were largely absent from the scientific literature. The synthesis of a 4-(pyrazin-2-yl)-1H-pyrrole-2-carboxamide and several fused bicyclic analogues all using standard procedures (SNAr, borylation, C–C cross couplings, hydrolysis, amide bond formation, cyclisation
作为药物发现计划的一部分,4-pyrrazin-2-yl-1 H -pyrrole-2-carboxamides 与许多双环类似物一起被使用。科学文献中基本上没有找到这些化合物的途径。4-(pyrazin-2-yl)-1 H -pyrrole-2-carboxamide 和几种稠合双环类似物的合成均使用标准程序(S N Ar、硼化、C-C 交叉偶联、水解、酰胺键形成、环化,卤化和烷基化)从容易获得的起始材料报道。每个最终化合物的合成序列范围为 4-12 步,分离中间体的产率范围为 20% 至 ∼100%。
[EN] AGELASTATIN A DERIVATIVES AND RELATED METHODS<br/>[FR] DÉRIVÉS D'AGÉLASTATINE A ET PROCÉDÉS ASSOCIÉS
申请人:ROMO DANIEL
公开号:WO2022240982A1
公开(公告)日:2022-11-17
Agelastatin compounds, methods for making agelastatin compounds, and methods for using agelastatin compounds.
Concise total syntheses of (±)-7-hydroxy debromo agelastatin A (AglA), (±)-AglA, and 11-nitro AglA are presented based on an identified pseudo-symmetry element. This synthetic strategy was developed based on a desire to improve solubility of this potent anticancer agent while also developing a synthetic strategy that would enable latestage variation of the pyrrole moiety. A stability study of pyrrole-derived
(±)-7-羟基 debromo agelastatin A (AglA)、(±)-AglA 和 11-硝基 AglA 的简明全合成基于已确定的伪对称元素。这种合成策略是基于提高这种强效抗癌剂溶解度的愿望而开发的,同时还开发了一种能够实现吡咯部分最新变化的合成策略。吡咯衍生的甲醇胺的稳定性研究揭示了影响环状甲醇胺和酮吡咯形式之间平衡的关键取代基效应。7-羟基AglA 主要以酮吡咯形式存在,但脱溴变体主要以环状甲醇胺形式存在。