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128640-00-6

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128640-00-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128640-00-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,6,4 and 0 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 128640-00:
(8*1)+(7*2)+(6*8)+(5*6)+(4*4)+(3*0)+(2*0)+(1*0)=116
116 % 10 = 6
So 128640-00-6 is a valid CAS Registry Number.

128640-00-6Downstream Products

128640-00-6Relevant articles and documents

Condensed heteroaromatic ring systems. XVII. Palladium-catalyzed cross-coupling reaction of aryl bromides with (Z)-1-ethoxy-2-tributylstannylethene and its utilization for construction of condensed heteroaromatics

Sakamoto,Kondo,Yasuhara,Yamanaka

, p. 1877 - 1886 (2007/10/02)

The palladium-catalyzed cross-coupling reaction of bromobenzenes or bromoheteroarenes such as pyridine, thiophene, indole with (Z)-1-ethoxy-2-tributylstannylethene gives good yields of the corresponding (Z)-1-ethoxy-2-(aryl and heteroaryl)ethenes. This method is effective for introducing an ethoxyethenyl group into an aromatic and heteroaromatic ring and is proved to have versatile utility for the construction of benzo[b]furan, indole, isocoumarin rings 2-bromophenol, 2-bromoaniline, and 2-bromobenzoate derivatives.

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