Oyo Mitsunobu revolutionized the chemistry of alcohols — his 1967 discovery of the Mitsunobu reaction provided a redox-based strategy for nucleophilic substitution at carbon centers bearing hydroxyl groups, which are usually poor leaving groups. After earning his doctorate under Teruaki Mukaiyama at the Tokyo Institute of Technology, Mitsunobu explored the reactivity of alcohols in nucleoside chemistry. His breakthrough came when he found that a combination of triphenylphosphine and diethyl azod

The Knoevenagel condensation elegantly constructs carbon–carbon bonds by coupling an active methylene compound with an aldehyde or ketone in the presence of a mild base such as piperidine or pyridine. Developed by Emil Knoevenagel in the late nineteenth century, this transformation broadened the synthetic landscape by enabling efficient formation of α,β-unsaturated carbonyl compounds under mild, operationally simple conditions. Its broad functional-group tolerance make it indispensable for prepa