LiBF4-Mediated Conversion of Aldehydes to gem-Diacetates

A Rapid and Efficient Procedure for Deprotection of 1,1-diacetates Catalysed by Silica Sulfate

An efficient procedure for converting a number of 1,1-diacetates into the corresponding aldehydes was developed with silica sulfate as catalyst. The advantages of this procedure is its brevity, and high yield. It is environmentally friendly and the catalyst is also inexpensive and reusable.

An Efficient and Practical Procedure for Preparation of Gem-Diacetates from Aldehydes Catalysed by Magnesium Perchlorate

A mild and efficient method for the preparation of gem-diacetates from aldehydes with acetic anhydride is described using a catalytic amount of magnesium perchlorate giving excellent yields under solvent-free conditions.

Ultrasound assisted the chemoselective 1,1-diacetate protection and deprotection of aldehydes catalyzed by poly(4-vinylpyridinium)hydrogen sulfate salt as a eco-benign, efficient and reusable solid acid catalyst

Poly(4-vinylpyridinium) hydrogen sulfate solid acid was found to be efficient catalyst for preparation of 1,1-diacetate using ultrasound irradiation at ambient temperature and neat condition. Deprotection of the resulting 1,1-diacetates were achieved using the same catalyst in methanol solvent under ultrasound irradiation at room temperature. This new method consistently has the advantage of excellent yields and short reaction times. Utilization of solvent free, simple reaction conditions, isolation, and purification makes this manipulation very interesting from an economic and environmental perspective. Further, the catalyst can be reused and recovered for several times.