Site-specific introduction of gold-carbenoids by intermolecular oxidation of ynamides or ynol ethers
作者:Paul W. Davies、Alex Cremonesi、Nicolas Martin
DOI:10.1039/c0cc02736g
日期:——
Ynamides and ynol ethers undergo intermolecular gold-catalysed reaction with a nucleophilic oxidant to access metal-carbenoid reactivity patterns. A site-specific oxidation/1,2-insertion cascade is used for a general access to functionalised α,β-unsaturated carboxylic acid derivatives and vinylogous carbimates.
Catalytic Asymmetric Dihydroxylation of Enamides and Application to the Total Synthesis of (+)-Tanikolide
作者:Benoit Gourdet、Hon Wai Lam
DOI:10.1002/anie.201004328
日期:2010.11.8
Asymmetricdihydroxylation of β,β′‐ disubstituted enamides afforded chiral tertiary‐alcohol‐containing α‐hydroxyaldehydes and 1,2‐diols with high enantioselectivity (see scheme). This method was applied to the total synthesis of the antifungal natural product (+)‐tanikolide, as well as the synthesis of an intermediate en route to (S)‐oxybutynin.
Palladium‐Catalyzed Silylcyanation of Ynamides: Regio‐ and Stereoselective Access to Tetrasubstituted 3‐Silyl‐2‐Aminoacrylonitriles
作者:Pierre Hansjacob、Frédéric R. Leroux、Vincent Gandon、Morgan Donnard
DOI:10.1002/anie.202200204
日期:2022.3.28
Tetrasubstituted 2-aminoacrylonitriles (α-enaminonitriles) are underinvestigated building blocks due to the lack of methodologies to synthesize them in a controlled manner. A general access to these valuable scaffolds accompanied by mechanistic investigations and DFT calculations is described. This highly regio- and stereoselective strategy relies on the use of the first intermolecular silylcyanation
Highly regio- and stereocontrolled synthesis of β-substituted α-tributylstannyl enamides
作者:David Buissonneaud、Jean-Christophe Cintrat
DOI:10.1016/j.tetlet.2006.02.141
日期:2006.5
The regio- and stereocontrolledsynthesis of β-substituted α-stannyl enamides is reported starting from internal ynamides. The synthesis of new ynamides as well as bis-ynamides is also described. Finally first examples of successful cross-coupling to afford α/β-disubstituted enamides are also reported.
Nickel-Catalyzed Highly Regioselective Multicomponent Coupling of Ynamides, Aldehydes, and Silane: A New Access to Functionalized Enamides
作者:Nozomi Saito、Tomoyuki Katayama、Yoshihiro Sato
DOI:10.1021/ol801534e
日期:2008.9.1
A newmethod for preparation of functionalized enamides by a nickel-catalyzed multicomponent coupling of ynamides, aldehydes, and silane has been developed. The coupling reaction proceeded in the presence of a nickel-IMes catalyst to give the corresponding gamma-silyloxyenamide derivative, which has an allylicalcohol moiety in the molecule, in a highly stereoselective manner.