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19673-37-1

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19673-37-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 19673-37-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,6,7 and 3 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 19673-37:
(7*1)+(6*9)+(5*6)+(4*7)+(3*3)+(2*3)+(1*7)=141
141 % 10 = 1
So 19673-37-1 is a valid CAS Registry Number.

19673-37-1Relevant articles and documents

Synthesis of (Z)-1,2-dihydro-1-tosylbenzo[b]azepin-3-ones by two-step, one-pot gold-catalyzed tandem heterocyclization/Petasis-Ferrier rearrangement of 2-(N-(prop-2-ynyl)-N-tosylamino)benzaldehydes

Sze, Ella Min Ling,Koh, Ming Joo,Tjia, Yen Min,Rao, Weidong,Chan, Philip Wai Hong

, p. 5558 - 5565 (2013/07/04)

A two-step, one-pot synthetic method that relies on gold(I)-catalyzed tandem heterocyclization/Petasis-Ferrier rearrangement and Br?nsted acid-assisted debenzoxylation of 2-(N-(prop-2-ynyl)-N-tosylamino)benzaldehydes to prepare (Z)-1,2-dihydro-1-tosylbenzo[b]azepin-3-ones efficiently is reported. The reactions proceed rapidly under mild and operationally straightforward conditions for a wide variety of aldehyde substrates containing electron-withdrawing, electron-donating, and sterically demanding functional groups and afforded the corresponding benzo-fused azaheterocyclic products in moderate to excellent yields.

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