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129034-81-7

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129034-81-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 129034-81-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,0,3 and 4 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 129034-81:
(8*1)+(7*2)+(6*9)+(5*0)+(4*3)+(3*4)+(2*8)+(1*1)=117
117 % 10 = 7
So 129034-81-7 is a valid CAS Registry Number.

129034-81-7Relevant articles and documents

3-Stannylcyclobutenediones as Nucleophilic Cyclobutenedione Equivalents. Synthesis of Substituted Cyclobutenediones and Cyclobutenedione Monoacetals and the Beneficial Effect of Catalytic Copper Iodide on the Stille Reaction

Liebeskind, Lanny S.,Fengl, Richard W.

, p. 5359 - 5364 (1990)

Treatment of 3,4-diisopropoxycyclobutenedione with n-Bu3SnSiMe3/catalytic CN- furnished 3-isopropoxy-4-(tri-n-butylstannyl)cyclobutenedione in 65 percent yield.This compound cross-coupled with organic iodides attached to sp2- and sp-

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