Synthesis of Azacarbolines via PhIO<sub>2</sub>-Promoted Intramolecular Oxidative Cyclization of α-Indolylhydrazones
作者:Matteo Corrieri、Lucia De Crescentini、Fabio Mantellini、Giacomo Mari、Stefania Santeusanio、Gianfranco Favi
DOI:10.1021/acs.joc.1c02217
日期:2021.12.17
An unprecedented synthesis of polysubstituted indole-fused pyridazines (azacarbolines) from α-indolylhydrazones under oxidative conditions using a combination of iodylbenzene (PhIO2) and trifluoroacetic acid (TFA) has been developed. This transformation is conducted without the need for transition metals, harsh conditions, or an inert atmosphere.
A Novel Assembly of Substituted Pyrroles by Acid-Catalyzed Sequential Three-Component Reaction of Amines, Alkynoates, and 1,2-Diaza-1,3-dienes
作者:Orazio A. Attanasi、Gianfranco Favi、Fabio Mantellini、Giada Moscatelli、Stefania Santeusanio
DOI:10.1002/adsc.201100094
日期:2011.6
A novel protocol for the assembly of polysubstituted pyrroles has been developed through the acid‐catalyzed, sequential three‐component reaction of primary aliphatic amines, alkynoates and 1,2‐diaza‐1,3‐dienes (DDs). This methodology proceeds with complete chemo‐/regioselectivity involving first formation of an enamino ester intermediate, in situ Michael addition with azo‐ene compounds and subsequent
Metal and Oxidant Free Construction of Substituted‐ and/or Polycyclic Indoles: A Useful Alternative to Bischler and Related Syntheses
作者:Giacomo Mari、Lucia De Crescentini、Gianfranco Favi、Stefania Santeusanio、Fabio Mantellini
DOI:10.1002/ejoc.202000845
日期:2020.9.7
wide range of substitutedindoles, including complex polycyclic‐architectures were easily assembled by means of a Amberlyst 15H catalyzed synthesis that employs 1,2‐diaza‐1,3‐dienes and anilines. The metal and oxidant free methodology proposed here is characterized by good yields, total and predictable regioselectivity, and the ability to provide electron withdrawing substitutedindoles.
The Rational Design and Atroposelective Synthesis of Axially Chiral C2‐Arylpyrrole‐Derived Amino Alcohols
作者:Tian‐Jiao Han、Zheng‐Xu Zhang、Min‐Can Wang、Li‐Ping Xu、Guang‐Jian Mei
DOI:10.1002/anie.202207517
日期:2022.9.5
biaryl amino alcohol scaffold, NPNOL, has been rationally designed. For the enantioselectivesynthesis of NPNOL, the chiral phosphoric acid catalyzed asymmetric Attanasi reaction was utilized. Density functional theory calculations were performed to reveal the reaction mechanism and the origins of the enantioselectivity. NPNOL could serve as a new platform for the development of chiral ligands and catalysts
A facile protocol for the preparation of 2-carboxylated thieno [2,3-<i>b</i>] indoles: a <i>de novo</i> access to alkaloid thienodolin
作者:Giacomo Mari、Lucia De Crescentini、Gianfranco Favi、Stefania Santeusanio、Fabio Mantellini
DOI:10.1039/d2ob00440b
日期:——
3-dienes and indoline 2-thione and requires mild reaction conditions. Furthermore, the easy work-up required makes this method amenable for a one-pot approach as demonstrated in the preparation of thienodolin, a natural product isolated from Streptomyces albogriseolus that exhibits valuable biological properties.
已成功开发出一种无金属策略,可替代已知的复杂环加成反应,生成 2-羧化噻吩并 [2,3- b ] 吲哚衍生物。新方法涉及作为起始材料易于获得的 1,2-二氮杂-1,3-二烯和二氢吲哚 2-硫酮,并且需要温和的反应条件。此外,所需的简单后处理使该方法适用于一锅法,如噻吩多林的制备所证明的那样,噻吩多林是一种从白灰链霉菌中分离出来的天然产物,具有有价值的生物学特性。