Aza-heterocyclic frameworks through intramolecular π-system trapping of spiro-<i>N</i>-acyliminiums generated from isoindolinone
作者:Sarra Chortani、Mohamed Othman、Ata Martin Lawson、Anis Romdhane、Hichem Ben Jannet、Michael Knorr、Lukas Brieger、Carsten Strohmann、Adam Daïch
DOI:10.1039/d0nj04052e
日期:——
spiro-isoindolinone-imides. The latter were produced in large scale in three steps from homophthalic acid. These imides were useful to provide in one step isoindolinones bearing hydroxymethyl-amide functions, tethered at quaternary carbon centre with promising biological issues. Submitted to Brønsted (TFA neat) and Lewis acid (trimethylsilyltrifluoro-methanesulfonic (TMSOTf) 10 mol%), the spiro-acetoxylactams undergo
通过螺-异吲哚满酮-酰亚胺的串联区域选择性还原/ O-酰化反应直接获得了作为主要底物的螺-乙酰氧基内酰胺。后者是由间苯二甲酸分三步大规模生产的。这些酰亚胺可用于一步提供具有羟甲基酰胺官能团的异吲哚啉酮,该化合物被季铵碳中心束缚,并具有潜在的生物学问题。螺-乙酰氧基内酰胺经Brønsted(TFA纯净)和路易斯酸(三甲基甲硅烷基三氟甲磺酸(TMSOTf)10摩尔%)进行π-环化N-酰基亚胺,非对映选择性地提供与芳族体系稠合或不稠合的π-芳族原始吡咯并吡咯并吡咯并氮杂庚烯-异吲哚。用π-烯烃,分离出与异吲哚啉融合或含有氨基酸的吡咯并吡啶和吡咯并-氮杂。还讨论了产生所有这些系统的反应机理。