Efficient Entry into 2-Substituted Tetrahydroquinoline Systems through Alkylative Ring Expansion: Stereoselective Formal Synthesis of (±)-Martinellic Acid
new efficient synthesis of 2-substituted tetrahydroquinolines has been achieved by the domino reaction of N-indanyl(methoxy)amines, which consists of three types of reactions: elimination of an alcohol, the rearrangement of an aryl group, and the addition of an organolithium or magnesium reagent. The synthetic utility of this approach is demonstrated by the stereoselective formal synthesis of (±)- martinellic
Iron-Catalyzed Intramolecular Aminations of C(sp<sup>3</sup>
)−H Bonds in Alkylaryl Azides
作者:Isabel T. Alt、Claudia Guttroff、Bernd Plietker
DOI:10.1002/anie.201704260
日期:2017.8.21
The nucleophilic iron complex Bu4N[Fe(CO)3(NO)] (TBA[Fe]) catalyzes the direct intramolecular amination of unactivated C(sp3)−H bonds in alkylaryl azides, which results in the formation of substituted indoline and tetrahydroquinoline derivatives.
亲核铁配合物Bu 4 N [Fe(CO)3(NO)](TBA [Fe])催化烷基芳基叠氮化物中未活化的C(sp 3)-H键的直接分子内胺化,导致形成取代的二氢吲哚和四氢喹啉衍生物。
Cu-catalyzed reduction of azaarenes and nitroaromatics with diboronic acid as reductant
copper-catalyzed reduction of azaarenes with diboronicacid as reductant in an aprotic solvent under mild conditions has been developed. Most interestingly, the nitroazaarenes could be reduced exclusively to give the corresponding amines without touching the azaarene moieties. Furthermore, the reductive amination of aromatic nitro compounds and aromatic aldehydes has also been realized. A series of
Oxidation Potential Tunable Organic Molecules and Their Catalytic Application to Aerobic Dehydrogenation of Tetrahydroquinolines
作者:Dahyeon Jung、Seol Heui Jang、Taeeun Yim、Jinho Kim
DOI:10.1021/acs.orglett.8b02749
日期:2018.10.19
In this work, oxidation potential tunable organic molecules, alkyl 2-phenyl hydrazocarboxylates, were disclosed. The exquisite tuning of their oxidation potentials facilitated a catalyticdehydrogenation of 1,2,3,4-tetrahydroquinolines in the presence of Mn(Pc) and O2.
Synthesis of Tetrahydroquinolines via Borrowing Hydrogen Methodology Using a Manganese PN<sup>3</sup> Pincer Catalyst
作者:Natalie Hofmann、Leonard Homberg、Kai C. Hultzsch
DOI:10.1021/acs.orglett.0c02905
日期:2020.10.16
simple secondary alcohols is reported. This one-pot cascade reaction is based on the borrowinghydrogenmethodology promoted by a manganese(I) PN3 pincer complex. The reaction selectively leads to 1,2,3,4-tetrahydroquinolines thanks to a targeted choice of base. This strategy provides an atom-efficient pathway with water as the only byproduct. In addition, no further reducing agents are required.