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93432-30-5

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93432-30-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 93432-30-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,3,4,3 and 2 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 93432-30:
(7*9)+(6*3)+(5*4)+(4*3)+(3*2)+(2*3)+(1*0)=125
125 % 10 = 5
So 93432-30-5 is a valid CAS Registry Number.

93432-30-5Downstream Products

93432-30-5Relevant articles and documents

Chiral Phosphoric Acid Catalyzed Enantioselective Synthesis of α-Tertiary Amino Ketones from Sulfonium Ylides

Guo, Wengang,Li, Pingfan,Luo, Yuzheng,Sun, Jianwei,Sung, Herman H.-Y.,Williams, Ian D.

, p. 14384 - 14390 (2020)

Herein we disclose a new catalytic asymmetric approach for the synthesis of chiral α-Amino ketones, which is particularly useful for the less accessible acyclic α-Tertiary cases. By a protonation-Amination sequence, our approach represents a rare asymmetric H-heteroatom bond insertion by α-carbonyl sulfonium ylides, an attractive surrogate of diazocarbonyls. The mild intermolecular C-N bond formation was catalyzed by chiral phosphoric acids with excellent efficiency and enantioselectivity. The products are precursors to other important chiral amine derivatives, including drug molecules and chiral ligands. The enantioselectivity was controlled by dynamic kinetic resolution in the amination step, rather than the initial protonation. This process opens up a new platform for the development of other related insertion reactions.

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