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133230-46-3

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133230-46-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133230-46-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,2,3 and 0 respectively; the second part has 2 digits, 4 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 133230-46:
(8*1)+(7*3)+(6*3)+(5*2)+(4*3)+(3*0)+(2*4)+(1*6)=83
83 % 10 = 3
So 133230-46-3 is a valid CAS Registry Number.

133230-46-3Relevant articles and documents

Heteroannulation of Arynes with α-Amino Imides: Synthesis of 2,2-Disubstituted Indolin-3-ones and Application to the Enantioselective Total Synthesis of (+)-Hinckdentine A

Torres-Ochoa, Rubén O.,Buyck, Thomas,Wang, Qian,Zhu, Jieping

, p. 5679 - 5683 (2018/04/26)

A novel heteroannulation reaction between α-amino imides and in situ generated arynes has been developed for the synthesis of 2,2-disubstituted indolin-3-ones. An enantioselective total synthesis of the marine alkaloid (+)-hinckdentine A was subsequently accomplished using this reaction as a key step. A catalytic enantioselective Michael addition of an α-aryl-α-isocyanoacetate to phenyl vinyl selenone was employed for the construction of the enantioenriched α-quaternary α-amino ester.

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