开发温和有效的合成策略,从容易获得的起始材料开始生产重要的分子,在有机合成中是必不可少的。在此,我们提出了一种三氟甲磺酸驱动的双环化途径,从简单的2-甲酰基(或2-酰基)肉桂酸酯和酚类生产功能化的茚并[2,1- c ]色烯-6(7 H )-酮。值得注意的是,该方案通过在单锅中激活非反应性酯部分,能够在无金属反应条件下构建两个 C-C 键和一个 C-O 键。中间体茚醇酯的分离可能表明通过烯酸酯的邻近双键与邻羰基部分进行自分子内环加成,随后用苯酚进行亲电攻击以及随后的环缩合途径。此外,还检查了光物理性质。
A highly stereoselective synthesis of fluorinated 1,3-disubstituted isoindolines is described. To this end, a tandem reaction consisting of a diastereoselective addition of fluorinated nucleophiles to Ellman’s N-(tert-butanesulfinyl)imines followed by an intramolecular aza-Michael reaction has been developed. This strategy allows for the construction of isoindolines bearing several degrees of fluorination
Transition-Metal-Free One-Pot Tandem Synthesis of 3-Ketoisoquinolines from Aldehydes and Phenacyl Azides
作者:Budaganaboyina Prasad、Mandalaparthi Phanindrudu、Dharmendra Kumar Tiwari、Ahmed Kamal
DOI:10.1021/acs.joc.9b01534
日期:2019.10.4
An efficient and transition-metal-free strategy for the synthesis of 3-keto-isoquinolines in one pot has been developed from the easily accessible 2-(formylphenyl)acrylates and phenacyl azides. Various substituted aldehydes and phenacyl azides were successfully employed in this transformation to furnish a variety 3-keto-isoquinolines in very good yields. A number of controlled experiments were conducted
Intramolecular Michael Reaction of <i>tert</i>-Butylsulfinyl Ketimines: Asymmetric Synthesis of 3-Substituted Indanones
作者:Santos Fustero、Elsa Rodríguez、Lidia Herrera、Amparo Asensio、Miguel A. Maestro、Pablo Barrio
DOI:10.1021/ol2028948
日期:2011.12.16
Aromatic tert-butylsulfinyl ketimines bearing a suitable Michael acceptor at the ortho position readily undergo an intramolecular conjugate addition achieving indanone derivatives in good yields and complete diastereoselectivity.