- Wacker Oxidation
- Wagner−Meerwein Rearrangement
- Weiss−Cook Reaction
- Wenker Synthesis
- Wharton Reaction
- Willgerodt−Kindler Reaction
- Wittig Reaction
- Wittig Reaction (Schlosser Modification)
- Wittig Rearrangement [1,2]
- Wittig Rearrangement [2,3]
- Wohl−Ziegler Reaction
- Wolff Rearrangement
- Wolff−Kishner Reduction
- Woodward Cis-Dihydroxylation