Ruthenium-Catalyzed Ortho C(sp2)–H Amidation of Benzaldehydes with Organic Azides
作者:Omer Rasheed
DOI:10.1055/s-0036-1591765
日期:2018.5
Abstract A ruthenium-catalyzed functionalization of benzaldehyde substrate with organic azides promoted by various transient directing groups has been developed. In this approach, C–H amination is achieved via a transient aldimine intermediate in good to excellent yields. A ruthenium-catalyzed functionalization of benzaldehyde substrate with organic azides promoted by various transient directing groups
Pd-catalyzed C-H functionalizations promoted by transientdirectinggroups remain largely limited to C-H arylation only. Herein, we report a diverse set of ortho-C(sp2)-H functionalizations of benzaldehyde substrates using the transientdirectinggroup strategy. Without installing any auxiliary directinggroup, Pd(II)-catalyzed C-H arylation, chlorination, bromination, and Ir(III)-catalyzed amidation
We developed a novel method of synthesizing nitrogen-containing fused-polycyclic compounds using tyramine derivatives as substrates. The method is based on the dearomatization of phenols via an intramolecular ipso-Friedel-Crafts allenylation and sequential bond-forming-cleavage reactions initiated by the construction of an indole skeleton. Structurally diverse fused-heterocycles were produced in reaction
We have succeeded in the highly diastereoselective synthesis of cyclobutane‐fused multi‐cyclic compounds using a scandium‐catalyzed cascade cyclization. Using 3–10 mol% of scandium(III) triflate [Sc(OTf)3], various cyclobutane‐fused tetrahydroquinoline derivatives as well as its chromane, thiochromane, and tetrahydronaphthalene analogues were obtained in good to excellent yields. Derivatizations of
The martinelline chiral core 3 and its diastereomer were synthesized by using the asymmetrictandemMichael–aldolreaction as the key step from 4-methoxycarbonylanthranilaldehyde and the α,β-unsaturated aldehyde.