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128720-14-9

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128720-14-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128720-14-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,7,2 and 0 respectively; the second part has 2 digits, 1 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 128720-14:
(8*1)+(7*2)+(6*8)+(5*7)+(4*2)+(3*0)+(2*1)+(1*4)=119
119 % 10 = 9
So 128720-14-9 is a valid CAS Registry Number.

128720-14-9Relevant articles and documents

The Concise Synthesis of Unsymmetric Triarylacetonitriles via Pd-Catalyzed Sequential Arylation: A New Synthetic Approach to Tri- and Tetraarylmethanes

Nambo, Masakazu,Yar, Muhammad,Smith, Joel D.,Crudden, Cathleen M.

, p. 50 - 53 (2015/07/28)

The selective synthesis of multiarylated acetonitriles via sequential palladium-catalyzed arylations of chloroacetonitrile is reported. The three aryl groups are installed via a Pd-catalyzed Suzuki-Miyaura cross coupling reaction followed by back-to-back C-H arylations to afford triarylacetonitriles in three steps with no over-arylation at any step. The triarylacetonitrile products can be converted into highly functionalized species including tetraarylmethanes. This new strategy provides rapid access to a variety of unsymmetrical tri- and tetraarylmethane derivatives from simple, readily available starting materials. (Chemical Presented)

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