A systematic review on catalytic Wittig and Knoevenagel condensation reactions

This review is focused on various reports in recent years on catalytic Wittig reactions and Knoevenagel condensation reactions in the presence of heterogeneous catalyst. The one-pot, cost-effective stereoselective catalytic Wittig reaction, is the reaction countering components generated by oxidation of primary alcohols without addition of base. Some reactions were reportedly performed under mild conditions, green and efficient approach providing the corresponding products in good to excellent yields within short times. The catalytic behavior over various catalysts for the Tandem oxidation reactions (TORs) was also summarized in this review.