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73712-55-7

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73712-55-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 73712-55-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,7,1 and 2 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 73712-55:
(7*7)+(6*3)+(5*7)+(4*1)+(3*2)+(2*5)+(1*5)=127
127 % 10 = 7
So 73712-55-7 is a valid CAS Registry Number.

73712-55-7Relevant articles and documents

Syntheses of Dihydropyrenes with Functionality in the Cavity of the ?-Electron Cloud

Mao, Yuh-lin,Boekelheide, Virgil

, p. 2746 - 2749 (1980)

The cyano group is shown to be a good group for directing ortho lithiation and, with 2,6-dicyanotoluene as starting material, ortho lithiation provides easy access to a variety of 1,2,3-trisubstituted benzene derivatives.The use of such derivatives in the standard thiacyclophane synthesis of dihydropyrenes has provided in good yield trans-15-(4'-butenyl)-16-methyldihydropyrene (14a) and trans-15-(methoxyethyl)-16-methyldihydropyrene (14b), the first examples of dihydropyrenes having functionality within the cavity of the aromatic ?-electron cloud.

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