Reactions — H
- Haller−Bauer Reaction
- Hammick Reaction
- Hantzsch Dihydropyridine Synthesis
- Hantzsch Pyrrole Synthesis
- Hantzsch Thiazole Synthesis
- Hass–Bender Oxidation
- Hauser−Kraus Reaction
- Heck Reaction
- Hegedus Indole Synthesis
- Hegedus Indole Synthesis Type 2
- Hell−Volhard−Zelinsky Reaction
- Hemetsberger Indole Synthesis
- Henry Nitroaldol Reaction
- Heron Rearrangement
- Heteroaryl Heck Reaction
- Heyns Rearrangement
- Hinsberg Thiophene Synthesis
- Hirao Reduction
- Hiyama Coupling
- Hoch−Campbell Aziridine Synthesis
- Hock Rearrangement
- Hofmann Elimination
- Hofmann Rearrangement
- Hofmann−Löffler−Freytag Reaction
- Horner−Wadsworth−Emmons Reaction
- Houben−Hoesch Reaction
- Huisgen Pyrazole Synthesis
- Huisgen Pyrrole Synthesis
- Hunsdiecker−Borodin Reaction