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128309-56-8

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128309-56-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128309-56-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,3,0 and 9 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 128309-56:
(8*1)+(7*2)+(6*8)+(5*3)+(4*0)+(3*9)+(2*5)+(1*6)=128
128 % 10 = 8
So 128309-56-8 is a valid CAS Registry Number.

128309-56-8Downstream Products

128309-56-8Relevant articles and documents

Iron-Catalyzed C(sp2)-C(sp3) Cross-Coupling of Chlorobenzenesulfonamides with Alkyl Grignard Reagents: Entry to Alkylated Aromatics

Bisz, Elwira,Szostak, Michal

, p. 1640 - 1646 (2019/02/07)

Alkylated benzosulfonamides are compounds of high importance in organic synthesis, including the production of pharmaceuticals, agrochemicals, and plasticizers. We report the iron-catalyzed C(sp2)-C(sp3) cross-coupling of chlorobenzosulfonamides with alkyl Grignard reagents under mild and sustainable conditions. Electronically and sterically varied benzosulfonamides as well as challenging alkyl organometallics containing β-hydrogen afford alkylated benzosulfonamides in high to excellent yields. Sulfonamide represents the most reactive activating group for iron-catalyzed cross-coupling. The process affords alkylated benzenesulfonamides poised for medicinal chemistry applications and traceless reductive cleavage.

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