- example, in the
following reaction, the
nitrogen atom is said to be
quaternized as it has gone from 3 to 4 substituents: R 3 N + RCl ⟶ R 4 N + Cl − {\displaystyle...
- reaction. PPh3
combines with
alkyl halides to give
phosphonium salts. This
quaternization reaction is
particularly fast for
benzylic and
allylic halides: PPh3...
-
methacrylic acid,
quaternized with
dimethylsulphate Polyquaternium-9
Homopolymer of N,N-(dimethylamino)ethyl
ester of
methacrylic acid,
quaternized with bromomethane...
-
temperature overnight and at
reflux (39-40 °C) over
several hours to give the
quaternized product (see the
article on Selectfluor). Due to
steric hindrance and...
- acid (van
Slyke determination). With
methyl iodide, the
amine becomes quaternized to give trimethylglycine, a
natural product: H 3N+ CH 2COO− + 3 CH3I...
- anions, such as
benzoate or saccharinate. It can be
obtained by the
quaternization of lidocaine, a po****r anesthetic, with
benzyl chloride or a similar...
- two main
methods of
chitosan quaternization:
direct quaternization and
indirect quaternization. The
direct quaternization of
chitosan amino acids treats...
- by the
quaternization of
triphenylphosphine with an
alkyl halide.
Wittig reagents are
usually derived from a
primary alkyl halide.
Quaternization of triphenylphosphine...
- formed. However, once the
benzimidazole is
detached from
cobalt by
quaternization with
methyl iodide, it is
replaced by H 2O or
hydroxyl ions. Various...
- a
method for
methylation of amines. This
method avoids the risk of
quaternization,
which occurs when
amines are
methylated with
methyl halides. Diazomethane...
