| Reaction |
Example |
Comments |
| Reduction to alcohol |
 |
NaBH4 can also be used |
| Grignard addition |
 |
Make 1o, 2o, and 3o alcohols |
| Reaction with G-NH2 |
 |
Better with aldehydes than ketones |
| Enamine formation |
 |
Requires 2o amine |
| Acetal formation |
 |
Sulfur analog also (red) |
| Addition of cyanide |
 |
Aldehydes and methyl ketones best |
| Wolff-Kishner reduction |
 |
One pot: omit TsOH; all aldehydes and ketones |
| Reduction to CH2 |
 |
All aldehydes and ketones |
| Reduction to CH2 |
 |
Only aryl ketones, aldehydes |
| Wittig reaction |
 |
Best method for alkenes |