Download presentation
Presentation is loading. Please wait.
Published byIrene Thomas Modified over 9 years ago
1
Aldehydes and Ketones - carbonyl compounds carbonyl group - structure, bonding and physical properties
2
Review of methods of preparation of aldehydes and ketones hydration of alkynes Friedel-Crafts acylation of aromatic compounds
3
Overview of reactions of carbonyl compounds reduction to alcohols addition of organometallic reagents addition of oxygen, nitrogen, sulfur and phosphorus nucleophiles reduction of carbonyl to methylene (Clemmensen or Wolff-Kishner)
4
Nucleophilic addition to carbonyls
6
Synthesis of Alcohols Reduction of Carbonyl Compounds
7
Synthesis of Alcohols Reduction of Carbonyl Compounds
8
H 2 /cat., NaBH 4, LiAlH 4 Synthesis of Alcohols Reduction of Carbonyl Compounds
9
lithium aluminum hydride (LAH)
13
sodium borohydride
14
Synthesis of Alcohols Using Organometallic Reagents
23
Hydration of aldehydes and ketones
24
An example
25
Addition of alcohols: hemiacetal and acetal formation
26
hemiacetal or hemiketal
27
Addition of alcohols: hemiacetal and acetal formation hemiacetalacetal
28
Mechanism of acetal formation
30
An example
31
Addition of ammonia and amines: imine and enamine formation
32
Examples
35
The Wittig Reaction
36
An example
37
The mechanism
38
Mechanism, cont.
41
Formation of cyanohydrins
42
Example
43
Reduction of carbonyls to alkanes Clemmensen reduction Wolff-Kishner reduction Desulfurization of thioketals
44
Nucleophilic Addition to a,b-Unsaturated Carbonyls
45
Strong nucleophiles add 1,2 kinetic control Weaker nucleophiles add 1,4 thermodynamic control
46
Nucleophilic Addition to a,b-Unsaturated Carbonyls
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.