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28172-56-7

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28172-56-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 28172-56-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,1,7 and 2 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 28172-56:
(7*2)+(6*8)+(5*1)+(4*7)+(3*2)+(2*5)+(1*6)=117
117 % 10 = 7
So 28172-56-7 is a valid CAS Registry Number.

28172-56-7Relevant articles and documents

Enantioselective iridium catalyzed α-alkylation of azlactones by a tandem asymmetric allylic alkylation/aza-Cope rearrangement

Bai, Xue-Dan,Zhang, Qing-Feng,He, Ying

supporting information, p. 5547 - 5550 (2019/05/21)

The development of an iridium catalyzed enantioselective α-alkylation of azlactones has been described. The reaction provides rapid access to a wide range of enantio-enriched quaternary carbon center allylated 2,4-diaryloxazol-5(2H)-ones in excellent yiel

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