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81810-74-4

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81810-74-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81810-74-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,8,1 and 0 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 81810-74:
(7*8)+(6*1)+(5*8)+(4*1)+(3*0)+(2*7)+(1*4)=124
124 % 10 = 4
So 81810-74-4 is a valid CAS Registry Number.

81810-74-4Relevant articles and documents

REACTION OF ACETYLOXIRANES WITH ACETONITRILE

Bubel', O. N.,Tishchenko, I. G.,Ptashnikov, Yu. L.

, p. 773 - 775 (2007/10/02)

2-Acetyloxiranes react with acetonitrile in the presence of equimolar amounts of Lewis acids.It was established that the use of boron trifluoride etherate or sulfuric acid as the catalyst leads to 2,7- and 3,6-diepoxy-1,5-dioxocanes, the use of aluminum trichloride, as well as stannic chloride, leads to the corresponding chlorohydrins, while the use of gaseous boron trifluoride leads to 2-oxazolines in satisfactory yields.It is shown that the reaction is regio- and stereospecific and that the resulting substituted 2-methyl-5-acetyl-2-oxazolines have a cis configuration.

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