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42042-39-7

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42042-39-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 42042-39-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,0,4 and 2 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 42042-39:
(7*4)+(6*2)+(5*0)+(4*4)+(3*2)+(2*3)+(1*9)=77
77 % 10 = 7
So 42042-39-7 is a valid CAS Registry Number.

42042-39-7Downstream Products

42042-39-7Relevant articles and documents

Base-Promoted Reaction of O-Sulfonylated Hydroxamic Acids with Nucleophiles. A New Mehtod for the Synthesis of α-Substituted Amides

Hoffman, Ribert V.,Nayyar, Naresh K.,Chen, Wenting

, p. 5700 - 5707 (2007/10/02)

Treatment of a series of hydroxamic acids 2 with mesyl chloride in the presence of 2 equiv of triethylamine at 0 deg C gives 2-chloroamides 3 in good yields.Use of a single equivalent of triethylamine gives the N-(mesyloxy)amides 1, which are versatile sy

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