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1638643-95-4

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1638643-95-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1638643-95-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,3,8,6,4 and 3 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1638643-95:
(9*1)+(8*6)+(7*3)+(6*8)+(5*6)+(4*4)+(3*3)+(2*9)+(1*5)=204
204 % 10 = 4
So 1638643-95-4 is a valid CAS Registry Number.

1638643-95-4Relevant articles and documents

Synthesis of substituted biaryls through gold-catalyzed petasis-ferrier rearrangement of propargyl ethers

Pati, Kamalkishore,Alabugin, Igor V.

, p. 3986 - 3990 (2014/07/08)

Au-catalyzed cycloisomerization of aryl propargyl ethers provides controlled transition from alkyne to carbonyl chemistry followed up by a Petasis-Ferrier rearrangement/aromatization cascade leading to substituted biaryls with functionalized naphthalene cores. An Au-catalyzed sequence of alkoxy group translocation, Petasis-Ferrier rearrangement, and aromatization transforms aryl propargyl ethers into substituted biaryls with functionalized naphthalene cores. Copyright

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