InBr
<sub>3</sub>
‐Catalyzed Coupling Reaction between Electron‐Deficient Alkenyl Ethers with Silyl Enolates for Stereoselective Synthesis of 1,5‐Dioxo‐alk‐2‐enes
InBr3 catalysis enables the coupling between 2‐carbonylalkenyl ethers and silyl enolates to give 1,5‐dioxo‐alk‐2‐enes featuring alkene moieties with perfect stereoselectivity. Various types of 2‐carbonylalkenyl ethers and silyl enolates are applicable to the present reaction. InBr3 with moderate Lewis acidity plays an important role in both the activation of alkenyl ethers and in the elimination of
KHAN, H. A.;PATERSON, I., TETRAHEDRON LETT., 1982, 23, N 23, 2399-2402
作者:KHAN, H. A.、PATERSON, I.
DOI:——
日期:——
O-silylated enolate phenylthioalkylation: a new synthesis of unsaturated 1,5-dicarbonyl compounds.
作者:Hassan A. Khan、Ian Paterson
DOI:10.1016/s0040-4039(00)87352-9
日期:1982.1
The O-silylated enolates of ketones and esters can be phenylthioalkylated by the chlorides (2) and (3) under ZnBr2-catalysis; ozonolysis and subsequent sulphoxide thermolysis then gives the corresponding unsaturated 1,5-dicarbonylcompounds.