CAS
No.: *******4 Formula: C*0H*0O2 Molecular Weight:
**2.*9 Melting point::
****8 °C(lit.) Boiling point:
**3 °C(lit.) Density:1.**2（g/mL,*0/4oC） Flash
point:**3°C Refractive
index :（*0°C）1.***1 Molar volume:（m3/mol）**0.3 Appearance:White
to slightly yellow crystal, with cherry and scent Solubility:Soluble in ethanol, ether, glycerin, propylene
glycol, most non-volatile oils and mineral oils, insoluble in
water. Purity:>*9% Package specification:**0kg/blue
barrel Storage:Pay
attention to the source of fire, especially to avoid sunlight, and
store in a cool place.
Usage: In the international market, it is
mainly used in essence,spices and
sunscreen. China\'s GB*********4 provides for the use of edible
flavors. It is used in the fragrance industry as a deodorant. It is
often used to blend oriental floral fragrances such as carnations,
cherries, strawberries and grapes. It is used in soaps, detergents,
flavors and pastries. Methyl cinnamate and ethyl cinnamate can
be added to cigarette cut tobacco for use as a flavoring agent and
a flavoring compensator. As an organic synthesis intermediate, it
is mainly used in the pharmaceutical industry. The medicinal value of methyl
cinnamate: methyl imidazole and methyl cinnamate are used as an
intermediate linker to prepare methyl p-bromomethylcinnamate, which
is the main raw material for the production of ozagrel. Methyl
cinnamate has a positive effect on the inhibition of vitiligo. In
whitening and sunscreen, the effect of methyl cinnamate is
obvious.
Methyl cinnamate (C6H5CHCHCOOCH3)
is a white crystal with a melting point of *4 ° C. It is insoluble
in water and soluble in ethanol and ether. Due to its fresh fruit
flavor, it is often used in the perfume industry to formulate fruit
flavors, oriental flavors and soap flavors. Such as high-grade
flavor, has a wide range of uses in food, daily cosmetics, soap,
etc. About the preparation of methyl cinnamate, using polyvinyl
pyridine as a catalyst, so that cinnamic acid and thionyl chloride
action into cinnamoyl chloride, and then Report on the preparation
of methyl cinnamate by reaction with methanol. This method not only
has low yield (yield *7%), many side reactions, complicated
operation steps, corrosion equipment, and tail gas recovery
problems, but also causes environmental pollution. The synthesis of
methyl cinnamate by ethylene glycol and palladium chloride,
polyvinyl chloride ferric chloride resin and ammonium ferric
sulfate dodecahydrate as catalysts, but these methods are also not
satisfactory. Solid superacid ZrO2/S2O*- The method of catalytic
synthesis of methyl cinnamate has not been reported in the
literature at home and abroad. The authors synthesized methyl
cinnamate with cinnamic acid and methanol under the catalysis of
solid superacid ZrO2/S2O**8. The catalyst is cheap and easy to
obtain and catalyze. High activity, Etching apparatus, recycled
reuse. This method is simple, mild reaction conditions,
environmental friendliness and high yields.
Methyl cinnamate, also known as
β-phenyl methacrylate, has a cocoa flavor and is mainly used in the
daily chemical and food industries. It is a commonly used deodorant
or food flavor, and is also an important organic synthetic raw
material. At present, its synthesis methods include inorganic acid
(such as hydrochloric acid, sulfuric acid) catalyzed
esterification, organic acid catalyzed esterification,
heterogeneous catalytic esterification and high pressure microwave
synthesis. The inorganic acid catalyzed esterification method has
many side reactions, long reaction time, low product yield, serious
equipment corrosion, wastewater generated by post-treatment, etc.
The reaction time of heterogeneous catalytic esterification method
is long, and the product yield is not high (*2%). ~*7%); organic
acid catalyzed esterification method has short reaction time and
high product yield, but high cost; high-pressure microwave
synthesis method can overcome the shortcomings of the first three
methods, but it is difficult to realize industrial production. In
the ***0s, the chemistry laboratory of Princeton University in the
United States found that ultrasound has the effect of accelerating
chemical reactions. In the mid****0s, the application of ultrasonic
in chemistry was rapidly developed. Ultrasound has been applied to
oxidation and reduction reactions in organic chemistry. , addition
reaction, polycondensation reaction, hydrolysis reaction, etc.,
almost involve various fields of organic chemistry, and ultrasonic
chemistry is considered to be green chemistry. As a new form of
energy, ultrasonic wave is used in organic chemical reactions,
which not only makes many reactions that could not be carried out
or difficult to carry out smoothly, but also is much better than
traditional mixing as a convenient, rapid, effective and safe
synthesis technology. , external heating method.
