274248-09-8 Usage
Chemical Properties
Colorless to Light yellow clear liquid
Preparation
The preparation of 1-Ethylcyclohexyl methacrylate is as follows:Weigh 34.3g (1.4mol) of magnesium chips,10 g (0.04 mol) of cesium chloride and 100 g of diethyl ether were placed in a 2 L three-necked flask and protected by dry nitrogen. Weigh 222.4g (2.04mol) of ethyl bromide,100g (1.02mol)After cyclohexanone is uniformly mixed with 500 g of diethyl ether, a preliminary solution I is formed and placed in a constant pressure dropping funnel.The internal temperature is 32 °C. Add 5 mL of the preliminary solution I to the magnesium chips, and after the reaction is initiated, a large amount of heat is released.The internal temperature rises to 60 ° C,The solution turned grey and white smoke appeared. When the internal temperature drops to 40 ° C, the preliminary solution I is continuously added dropwise and stirring is started. Control the internal temperature <65 ° C, lh drops,After maintaining the temperature at 40 ° C for 2 h. Add 8.96g(0.08 mol) potassium t-butoxide, 10 g phenothiazine.188.6 g (1.2 mol) of methacrylic anhydride was weighed and mixed with 100 g of diethyl ether to form a preliminary liquid II, which was placed in a constant pressure dropping funnel. When the internal temperature of the reaction system is 40 ° C,Start adding the preliminary solution II, and with the addition of the mixed solution,The reaction was slowly exothermic and the internal temperature was controlled to drop below 65 °C. After 30 minutes,After stirring at 50 ° C for 3 h, the reaction was stopped, and after cooling to 25 ° C,The reaction solution was poured into 1 L of ice water and stirred for 40 min. Liquid separation,The aqueous phase was extracted with 150. 0 g x 2 of diethyl ether.The organic phases were combined, washed with 50.0 g of 2 NaOH aqueous solution, and washed with 200 g×2 pure water.Drying with 100. 0 g of anhydrous sodium sulfate, suction filtration,Distillation under reduced pressure, collecting fractions at 60 Pa (60-80 ° C),180.6 g of a colorless transparent liquid was obtained, and the nuclear magnetic spectrum confirmed that the structure was correct.The purity of the GC was 99.52%, and the yield was 90.3%.
Check Digit Verification of cas no
The CAS Registry Mumber 274248-09-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,7,4,2,4 and 8 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 274248-09:
(8*2)+(7*7)+(6*4)+(5*2)+(4*4)+(3*8)+(2*0)+(1*9)=148
148 % 10 = 8
So 274248-09-8 is a valid CAS Registry Number.
274248-09-8Relevant articles and documents
Preparation method of 1-ethylcyclohexylmethacrylate
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Paragraph 0018-0023, (2019/07/01)
The invention discloses a preparation method of 1-ethylcyclohexylmethacrylate. The preparation method comprises following steps: bromoethane, Cyclohexanone, and magnesium chips are subjected to reaction in the presence of a first catalyst, after reaction,
Process for preparing acrylate compound
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, (2008/06/13)
An acrylate compound of formula (4): 1is produced by allowing an acrylic acid compound of formula (1): 2to react with an unsaturated compound of formula (2) or (3): 3In formulae (1) through (4), R1 and R2 are H or F, R3 is H, F, or an alkyl, alkenyl, fluoroalkyl or fluoroalkenyl group, R4 and R5 are H, halogen, or an alkyl, alkenyl, halogenated alkyl or halogenated alkenyl group; and X and Y are an unsubstituted or substituted hydrocarbon group, and dashed line - - - - - means that X and Y may be bonded together to form a cyclic structure.
