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1391837-83-4

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1391837-83-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1391837-83-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,9,1,8,3 and 7 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1391837-83:
(9*1)+(8*3)+(7*9)+(6*1)+(5*8)+(4*3)+(3*7)+(2*8)+(1*3)=194
194 % 10 = 4
So 1391837-83-4 is a valid CAS Registry Number.

1391837-83-4Downstream Products

1391837-83-4Relevant articles and documents

DABCO-mediated [4+2] annulation of but-3-yn-2-one and activated ketones: Facile preparation of 2,3-dihydropyran-4-one

Lian, Zhong,Zhao, Qian-Yi,Wei, Yin,Shi, Min

supporting information; experimental part, p. 3338 - 3341 (2012/07/01)

We found that nitrogen-containing Lewis base mediated [4+2] annulation of but-3-yn-2-one with activated ketones could proceed efficiently to give the corresponding 2,3-dihydropyran-4-ones in moderate to good yields under mild conditions. The substrate scope has been carefully examined. Moreover, a plausible reaction mechanism for the [4+2] annulation of but-3-yn-2-one with activated ketones mediated by DABCO has been proposed on the basis of previous literature and our own investigations. Copyright

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