Cas 84904-05-2,but-3-en-1-yl 4-methylbenzoate

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Check Digit Verification of cas no

The CAS Registry Mumber 84904-05-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,4,9,0 and 4 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 84904-05:
(7*8)+(6*4)+(5*9)+(4*0)+(3*4)+(2*0)+(1*5)=142
142 % 10 = 2
So 84904-05-2 is a valid CAS Registry Number.

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84904-05-2Relevant academic research and scientific papers

Construction of Esters through Sulfuryl Fluoride (SO 2 F 2) Mediated Dehydrative Coupling of Carboxylic Acids with Alcohols at Room Temperature

Qin, Hua-Li,S Alharbi, Njud,Wang, Shi-Meng

, p. 3901 - 3907 (2019/10/11)

A facile method for the construction of esters through dehydrative coupling of carboxylic acids with alcohols is developed. The reactions are mediated by sulfuryl fluoride (SO 2 F 2) at room temperature and proceed with high efficiency. The method has several advantages including broad substrate scope, mild conditions, excellent functional group compatibility and affords high yields, even on gram scale.

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