我们开发了一种简单有效的合成方案来生产 5,6,7,12-四氢苯并[2,3]氮杂[4,5- b ]吲哚和 7,12-二氢-6 H-苯并[2,3] oxepino[4,5- b ]吲哚衍生物在温和条件下。该成环过程涉及通过形成二氢螺吲哚喹啉(作为反应途径中的关键中间体)原位生成的酮亚胺部分的分子内环化。进行了一些对照实验和光谱研究以阐明潜在的反应机制。
Synthesis of 5-Substituted 4,4-Disubstituted 2-Cyclohexen-1-ones by Electro-Generated Base Promoted Michael Addition of 4,4-Disubstituted 2,5-Cyclohexadien-1-ones
A general synthesis of bridged isoxazolidines from a double hetero-Michael addition of N-substituted hydroxylamines to quinone monoketals has been developed. The different addition order of N-benzylhydroxylamine and N-Boc hydroxylamine is also discussed. Moreover, the various functionalities in the isoxazolidine products allow facile derivatization.
The oxidation reactions of aromatic 3,3-sigmatropic systems have been investigated under different conditions viz., (a) anodicoxidation in amphipr
已经研究了在不同条件下芳香族3,3-σ系的氧化反应。,(a)两栖动物中的阳极氧化
Desymmetrization Process by Mg(II)-Catalyzed Intramolecular Vinylogous Michael Reaction
作者:Dan Li、Minmin Zhang、Yuling Yang、Tianyu Peng、Dongxu Yang、Wei Gao、Rui Wang
DOI:10.1021/acs.orglett.0c03417
日期:2020.12.4
Chiral magnesium catalyzed intramolecular vinylogous Michael reaction of novel cyclohexadienones via a desymmetrization process is reported. (R)-BINOL derived ligand and an achiral amide were employed in the current in situ generated magnesium catalyst, giving the corresponding hydrogenated benzofuranone skeletons in good to excellent enantioselectivities with high yields. This simple and efficient
The electrochemical oxidation of a few methoxy substituted aromatic 3,3-sigmatropic systems yielded mixed quinone monoketals in aqueous methanol and dimerised products in anhydrous acetonitrile.