Rhodium-Catalyzed Oxidative C–H Allylation of Benzamides with 1,3-Dienes by Allyl-to-Allyl 1,4-Rh(III) Migration
作者:Stamatis E. Korkis、David J. Burns、Hon Wai Lam
DOI:10.1021/jacs.6b06884
日期:2016.9.21
oxidative C-H allylation of N-acetylbenzamides with 1,3-dienes is described. The presence of allylic hydrogens cis to the less substituted alkene of the 1,3-diene is important for the success of these reactions. With the assistance of reactions using deuterated 1,3-dienes, a proposed mechanism is provided. The key step is postulated to be the first reported examples of allyl-to-allyl 1,4-Rh(III) migration
A one-pot sequence involving an exo-Diels–Alder reaction followed by a Lewis acid gold(I) catalyzedcyclization has allowed access to three complex polycyclic scaffolds. Structural diversity is obtained by varying solvent and the ligand of the gold(I) catalyst. An additional Diels–Alder step generates tetracyclic cores possessing up to 5 stereocenters.
Nickel-catalyzed reductive 1,3-diene formation from the cross-coupling of vinyl bromides
作者:Yunfei Sha、Jiandong Liu、Liang Wang、Demin Liang、Da Wu、Hegui Gong
DOI:10.1039/d1ob00791b
日期:——
Facile construction of 1,3-dienes building upon cross-electrophile coupling of two open-chain vinyl halides is disclosed in this work, showing moderate chemoselectivities between the terminal bromoalkenes and internal vinyl bromides. The present method is mild and tolerates a range of functional groups and can be applied to the total synthesis of a tobacco fragrance solanone.
Unusual addition reactions of alkoxymethyl substituted allylstannanes to a carbonyl compound. Complete product control by the alkoxy group regardless of original regio- and stereo-chemistry
作者:Yoshinori Naruta、Kazuhiro Maruyama
DOI:10.1039/c39830001264
日期:——
Alkoxymethyl substituted allylstannanes have been prepared and their Lewis acid mediated allylation of a carbonylcompound results in the formation of the corresponding cis-4-alkoxymethylbut-3-en-1-ol regardless of the regio- and stereo-chemistry of the original allylstannanes.
Cascade Alkenyl Amination/Heck Reaction Promoted by a Bifunctional Palladium Catalyst: A Novel One-Pot Synthesis of Indoles from<i>o</i>-Haloanilines and Alkenyl Halides
A novelapproach for the synthesis of the important indole ring is described. Indoles are obtained from o-bromoanilines and alkenyl halides in a Pd-catalyzed cascade process that involves an alkenyl amination followed by an intramolecular Heckreaction. The overall process represents the first example of the participation of alkenyl amination reactions in Pd-catalyzed cascade reactions. Initially,