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1549795-23-4

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1549795-23-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1549795-23-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,5,4,9,7,9 and 5 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1549795-23:
(9*1)+(8*5)+(7*4)+(6*9)+(5*7)+(4*9)+(3*5)+(2*2)+(1*3)=224
224 % 10 = 4
So 1549795-23-4 is a valid CAS Registry Number.

1549795-23-4Downstream Products

1549795-23-4Relevant articles and documents

Asymmetric Synthesis of a 5,7-Fused Ring System Enabled by an Intramolecular Buchner Reaction with Chiral Rhodium Catalyst

Hoshi, Takayuki,Ota, Eisuke,Inokuma, Yasuhide,Yamaguchi, Junichiro

, p. 10081 - 10084 (2019/12/27)

A Rh-catalyzed asymmetric intramolecular Buchner ring expansion of α-alkyl-α-diazoesters has been developed. The present protocol generates a 5,7-fused ring system in an enantioselective manner while minimizing β-hydrogen migration, which has been a competing reaction when using α-alkyl-α-diazoesters. The ester functionality at the bridgehead position would be a useful synthetic handle for further derivatization to complex molecules including natural products.

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