Photocatalytic Indole Diels–Alder Cycloadditions Mediated by Heterogeneous Platinum-Modified Titanium Dioxide
作者:Spencer P. Pitre、Juan C. Scaiano、Tehshik P. Yoon
DOI:10.1021/acscatal.7b02223
日期:2017.10.6
Indole alkaloids represent an important class of molecules, with many naturally occurring derivatives possessing significant biological activity. One area that requires further development in the synthesis of indole derivatives is the Diels–Alder reaction. In this work, we expand on our previously developed heterogeneous protocol for the [4 + 2] cycloaddition of indoles and electron-rich dienes mediated
efficient transitionmetal triflate catalyzed approach to convert biomass-based compounds, such as monoterpene alcohols, sugar alcohols, octyl acetate and tea tree oil, to their corresponding olefins in high yields. The reaction proceeds through C–O bond cleavage under solvent-free conditions, where the catalytic activity is determined by the oxophilicity and the Lewis acidity of the metal catalyst
Isomerization equilibrium of the p-menthadienes in the vapor phase
作者:Z. A. Filippenko、O. M. Baranov、G. N. Roganov、G. Ya. Kabo
DOI:10.1007/bf00574247
日期:——
The isomerization equilibrium between nine p-menthadienes has been studied in the vaporphase at 250°C and their equilibrium ratios have been determined. A method for the quantitative GLC analysis of mixtures of isomeric p-menthadienes has been developed.