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157808-71-4

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157808-71-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 157808-71-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,8,0 and 8 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 157808-71:
(8*1)+(7*5)+(6*7)+(5*8)+(4*0)+(3*8)+(2*7)+(1*1)=164
164 % 10 = 4
So 157808-71-4 is a valid CAS Registry Number.

157808-71-4Downstream Products

157808-71-4Relevant articles and documents

PREPARATION OF 2-ARYL- AND 2-ALKENYL-SUBSTITUTED CARBAPENEMS UNDER MILD SUZUKI CROSS-COUPLING CONDITIONS

Yasuda, Nobuyoshi,Xavier, Lyndon,Rieger, Dale L.,Li, Yulan,DeCamp, Ann E.,Dolling, Ulf-H.

, p. 3211 - 3214 (2007/10/02)

An extraordinary mild procedure for the synthesis of 2-aryl- and 2-alkenyl-substituted carbapenems via palladium-catalyzed coupling of a vinyl triflate with aryl or vinyl boronic acids is described.A major advantage of this procedure is the use of nontoxic boronic acid intermediates in place of highly toxic organostannane compounds which are used in the corresponding Stille cross-coupling reactions.

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