Sangeeta V. Pitre

Studies in Lewis acid and LiClO4 (or Nafion-H) catalysed ionic Diels-Alder reactions of chiral and achiral olefinic acetals respectively☆☆☆

Abstract Chiral olefinic acetals derived from crotonaldehyde undergo ionic Diels-Alder reaction giving the corresponding cycloadducts in moderate to good diastereoselectivities. A variety of achiral olefinic acetals react with isoprene and cyclopentadiene to form the cycloadducts in good to excellent yields when catalysed by 4M LiClO4 in nitromethane or by Nafion-H in dichloromethane.

Palladium catalysed conversion of vinyl bromo allylic alcohols into vinylic carbonyl compounds and oxidation of secondary alcohols to ketones

Abstract A variety of vinyl bromo allylic alcohols are converted into the corresponding vinylic carbonyl compounds and secondary alcohols are oxidised into ketones upon treatment with palladium acetate in the presence of potassium carbonate under the typical Heck reaction conditions.

Zeolite H-ZSM 5 Catalysed Oxidation of Alcohols with Chromium Trioxide. Part 9.1 General Synthetic Methods†

A variety of alcohols are oxidised to the corresponding carbonyl compounds in excellent yields by chromium trioxide–H-ZSM 5 in dichloromethane at room temperature.