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131111-05-2

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131111-05-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131111-05-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,1,1 and 1 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 131111-05:
(8*1)+(7*3)+(6*1)+(5*1)+(4*1)+(3*1)+(2*0)+(1*5)=52
52 % 10 = 2
So 131111-05-2 is a valid CAS Registry Number.

131111-05-2Downstream Products

131111-05-2Relevant articles and documents

A facile synthesis of C(3)-alkenyl substituted cephems through addition-cyclization of allenecarboxylates derived from penicillin

Tanaka, Hideo,Kameyama, Yutaka,Sumida, Shin-Ichi,Torii, Sigeru

, p. 7029 - 7030 (1992)

A short-cut route to cephalosporins bearing alkenyl substituents on the C(3)-position through copper(I) chloride-promoted Michael-type addition of alkenyltributyltins to allenecarboxylates, derived from penicillin, is described.

Palladium in Cephalosporin Chemistry: Mild Triflate Couplings in the Absence of Phosphines and Halide Donors

Baker, Stephen R.,Roth, Gregory P.,Sapino, Chester

, p. 2185 - 2189 (2007/10/02)

Palladium catalyzed triflate-organostannane couplings are shown to proceed in a very mild manner in the absence of added phosphine and halide reagents.This protocol has been demonstrated for 3-trifloxycephems and vinyltriflates.

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