Preparation of 1-aryl-substituted isoindoline derivatives by sequential Morita–Baylis–Hillman and intramolecular Diels–Alder reactions
作者:Kristen Nicole Clary、Masood Parvez、Thomas George Back
DOI:10.1039/b817954a
日期:——
Aldimines underwent MoritaâBaylisâHillman reactions with dienes activated by sulfonyl or nitrile groups. The N-allyl or propargyl derivatives of the products were subjected to intramolecular DielsâAlder cycloadditions to produce the corresponding partly saturated 1-arylisoindoline derivatives. The cycloadducts in the nitrile-activated N-propargyl series were aromatized by base-mediated elimination of HCN to afford 1-arylisoindolines, which were in turn oxidized to the corresponding 3-arylisoindolin-1-ones.
铝亚胺与由磺酰基或腈基团激活的二烯发生莫里塔-贝利斯-希尔曼反应。产物的N-烯丙基或丙炔基衍生物随后进行了分子内的Diels-Alder环加成反应,生成相应的部分饱和1-芳基异吲哚衍生物。在腈基激活的N-丙炔基系列中,环加成产物通过碱介导的氰化氢消除反应脱除,得到1-芳基异吲哚,后来这些产物又被氧化成相应的3-芳基异吲哚-1-酮。