SGRL has broad expertise in handling of the following
reactions and processes. We can undertake custom/contract manufacture for you.
· Chlorination
· Grignard Reactions
· Hydrogenation / Reduction
· Oxidation
· Bromination
· Esterification
Chlorination:
Carboxylic acids react with Thionyl Chloride (SOCl2) to form
Acid chlorides. During the reaction the hydroxyl group of the carboxylic acid
is converted to a chlorosulfite intermediate making it a better leaving group.
The chloride anion produced during the reaction acts a nucleophile.
Products of Shree
Ganesh Remedies Limited in Acid Chlorides
2-Furoic acid CAS 88-14-2
O-Acetylsalicyloyl chloride CAS 5538-51-2
Cyclopropanecarbonyl chloride CAS 4023-34-1
Mechanism of
Chlorination to Manufacture Acid Chlorides
There is a distinct mechanism to make acid chlorides using
thionyl chloride compounds. This mechanism, the process used to complete an
acid chloride reaction, is called nucleophilic acyl substitution.
Let's break down the steps occurring in this reaction.
Step 1: We call the oxygen atom, in the alcohol group, a
nucleophile. A nucleophile is a molecule or ion that will donate its electron
pair to form a chemical bond. This nucleophile attacks the carbon atom, an
electrophile, in the carbonyl group (CO). An electrophile is a molecule that
accepts an electron pair to form a chemical bond. When the nucleophile attacks
the electrophile, the result is an intermediate formed with our friend thionyl chloride.
Step 2: Following this attack, the intermediate collapses.
This causes the removal of the chlorine atom as a leaving group from thionyl
chloride. A leaving group is any fragment (molecule or atom) that leaves with
its electrons. Once the leaving group is removed, a chlorosulfite ion is
formed.
Step 3: A second nucleophilic attack on the carbonyl group
of the chlorosulfite ion occurs. The chlorine atom, a leaving group, bonds to
the carbon atom. Note that this carbon atom is an electrophile. Once bonded, an
intermediate is formed.
Step 4: The leaving group is removed and intermediate
collapses. This leads to the production of yet another intermediate.
fine chemicals
pharmaceutical drug intermediate
API Intermediate manufacturers
pharmaceutical intermediates manufacturers
Cyclopropane carbonyl Chloride 4023-34-1
No comments:
Post a Comment