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1438428-70-6

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1438428-70-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1438428-70-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,3,8,4,2 and 8 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1438428-70:
(9*1)+(8*4)+(7*3)+(6*8)+(5*4)+(4*2)+(3*8)+(2*7)+(1*0)=176
176 % 10 = 6
So 1438428-70-6 is a valid CAS Registry Number.

1438428-70-6Downstream Products

1438428-70-6Relevant articles and documents

Organocatalytic enantioselective aza-Michael addition of purine bases to α,β-unsaturated ketones

Wu, Hao,Tian, Zhiqing,Zhang, Lili,Huang, Yaodong,Wang, Yongmei

supporting information, p. 2977 - 2984 (2013/01/15)

The first organocatalytic enantioselective aza-Michael addition of purine bases to α,β-unsaturated ketones has been developed, affording Michael adducts in moderate to high yields (up to 96% yield) and high to excellent enantioselectivities (up to >99% ee). A wide range of α,β-unsaturated ketones including aliphatic and aromatic enones are tolerated in this process, generally demonstrating good reactivity, regioselectivity and enantioselectivity. The aromatic α,β-unsaturated ketones showing quite low reactivity in the reported catalytic systems, were first successfully employed as Michael acceptors in this transformation, yielding high enantioselectivities (up to 94% ee). The utility of this method was also applied for the synthesis of enantioenriched non-natural nucleoside analogues with potential biological activities. Copyright

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