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1443007-93-9

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1443007-93-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1443007-93-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,4,3,0,0 and 7 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1443007-93:
(9*1)+(8*4)+(7*4)+(6*3)+(5*0)+(4*0)+(3*7)+(2*9)+(1*3)=129
129 % 10 = 9
So 1443007-93-9 is a valid CAS Registry Number.

1443007-93-9Relevant articles and documents

Stereoinversion of Unactivated Alcohols by Tethered Sulfonamides

Marcyk, Paul T.,Jefferies, Latisha R.,AbuSalim, Deyaa I.,Pink, Maren,Baik, Mu-Hyun,Cook, Silas P.

, p. 1727 - 1731 (2019/01/21)

The direct, catalytic substitution of unactivated alcohols remains an undeveloped area of organic synthesis. Moreover, catalytic activation of this difficult electrophile with predictable stereo-outcomes presents an even more formidable challenge. Described herein is a simple iron-based catalyst system which provides the mild, direct conversion of secondary and tertiary alcohols to sulfonamides. Starting from enantioenriched alcohols, the intramolecular variant proceeds with stereoinversion to produce enantioenriched 2- and 2,2-subsituted pyrrolidines and indolines, without prior derivatization of the alcohol or solvolytic conditions.

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