Test 2 reactions Flashcards
Carboxylic Acid——-> Acid Halide
PX3, Pyridine heat OR SOCl2, pyridine heat
Acid halide——> anhydride
Carboxylate
Acid Halide——-> ester
Alcohol
Acid Halide——-> Amide
2 eq amine
Acid Halide——-> carboxylic acid
H2O
2 carboxylic acid ——> anhydride
P2O5
or
heat
(remove H2O)
Anhydride——–> Ester
mixture of esters
alcohol
Anhydride——-> Amide
2 eq amine
Hydrolysis of anhydride
H2O
Carboxylate——–> ester
PRIMARY alkyl halide
Carboxylic Acid——–> ester
DCC
Alcohol
Fisher Esterification:
Carboxylic acid——–ester
alcohol in the presence of an acid
Transesterification:
Ester———> new Ester
alcohol in the presence of an acid
Ester———> Amide
amine
Acid catalyzed hydrolysis of an ester
H2O
H+
(reversible)
Acid catalyzed hydrolysis of the tertiary alkyl ester
H2O
H+
(Sn1)
Base catalyzed hydrolysis of an ester
Saponification
NaOH
H2O
(not reversible)
Carboxylic Acid———> Amide
DCC
an Amine
Amide———-> ester
Alcohol
Heat
(in acidic conditions)
Amide———> Nitrile
thionyl chloride
SOCl2
Base Catalyzed hydrolysis of Amide
- NaOH H2O
2. H+
Acid catalyzed hydrolysis of Amide
H2O
H+
Gabriels Amine Synthesis:
Creates Primary Amine
- NaOH
- Alkyl Halide
- HCl, H2O
- NaOH
Alkyl Halide————> Nitrile
Cyanide
CtriplebondN
Acid Catalyzed hydrolysis of Nitrile
H2O,HCl
Heat
formaldehyde———->primary alcohol
- Grignard reagent
2. H3O+
Aldehyde———-> Secondary alcohol
- Grignard Reagent
2. H3O+
Ketone———> Tertiary Alcohol
- Grignard reagent
2. H3O+
ester OR acyl halide——-> tertiary alcohol
- 2 eq Grignard reagent
- H2O
(product will have 2 identical substituents)
The Silyl Ether protecting group
Protects the OH
TMS-Cl
imidazole
(TBDMS-Cl)
Addition of Acetylide Anion
Ketones & Aldehydes
- Acetylide Anion ( -CtripleCCH3)
2. pyridinium chloride
Ketone/aldehyde——-> cyanohydrin
HCN, KCN
Acid Halide———> Primary alcohol
- 2 eq NaBH4
2. H2O
Acid Halide———-> Aldehyde
- LiAl[OC(CH3)3}3H -78degC
2. H2O
Aldehyde——–> Primary Alcohol
- NaBH4
2. H3O+
Ketone——-> Secondary Alcohol
- NaBH4
2. H3O+
Ester———-> Primary Alcohol
- 2 eq LiAlH4
2. H3O+
Ester———> Aldehyde
- DIBALH -78degC
2. H2O
Carboxylic Acid————> Primary Alcohol
- 2 eq LiAlH4
2. H3O+
Amide——–> Amine
- LiAlH4
2. H2O
Nitriles——–>primary amine
- NaBH4
- H2O
OR
H2, Raney Ni
Imine———-> Secondary Amine
- NaBH4
- H2O
OR
H2, Raney Ni
Aldehyde/Ketone————> Imine
Primary amine, H+ (trace)
reversible with H3O+
imine———-> secondary amine
NaBH3CN
OR
H2, Pd/C
Aldehyde/Ketone————> Enamine
Secondary amine, H+ (trace)
reversible with H3O+
Enamine———> tertiary amine
NaBH3CN
OR
H2, Pd/C
Aldehyde/Ketone————> Hemiacetal
1 eq alcohol
reverses with H3O+
Aldehyde/Ketone————>Acetal
2 eq alcohol
reverses with H3O+
Ketone———> ester
peroxyacid
Aldehyde———> carboxylic acid
peroxyacid
aldehyde/ketone———-> thioacetal
2 eq thiol
alkylation of thioacetal
- nBuLi
2. alkyl halide
Hydrogenation of thioacetal
H2 Raney Ni
Primary alkyl halide——-> Wittig
- PPh3
2. nBuLi
Aldehyde/ketone——> alkene
WIttig reagent