Facile Sc(OTf)<sub>3</sub>-Catalyzed Generation and Successive Aromatization of Isobenzofuran from <i>o</i>-Dicarbonylbenzenes
作者:Yuta Nishina、Tatsuya Kida、Tomonari Ureshino
DOI:10.1021/ol201479p
日期:2011.8.5
Isobenzofuran can be prepared from o-phthalaldehyde using hydrosilane. The formed isobenzofuran is trapped by an alkene via a Diels–Alder reaction. Further dehydration proceeds to furnish the conjugated aromatic compound. This multistep reaction was promoted by catalytic amounts of Sc(OTf)3.
Synthesis of Naphthalimides through Tandem Pd(II)-Catalyzed C(sp<sup>3</sup>)–H Oxidation and Diels–Alder Reaction Using a Transient Directing Group Strategy
作者:Ming-Shun Mei、Yanghui Zhang
DOI:10.1021/acs.orglett.3c01590
日期:2023.7.14
efficient methods for the synthesis of naphthalimides with structural diversity. In this work, we developed a new approach for the synthesis of naphthalimides via a tandemreaction of o-methylbenzaldehydes and maleimides. The tandemreaction involves Pd(II)-catalyzed benzylic C(sp3)–H oxidation using an amino acid as the transient directing group and Diels–Alder reaction. The subsequent dehydration