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84201-12-7

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84201-12-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 84201-12-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,4,2,0 and 1 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 84201-12:
(7*8)+(6*4)+(5*2)+(4*0)+(3*1)+(2*1)+(1*2)=97
97 % 10 = 7
So 84201-12-7 is a valid CAS Registry Number.

84201-12-7Relevant articles and documents

NEW METHODS AND REAGENTS IN ORGANIC SYNTHESIS. 30. RING ENLARGEMENT OF CYCLOALKANONES WITH BENZYLSULFONYLDIAZOMETHANE AND CONVERSION OF THE RESULTING HOMOLOGATED 2-BENZYLSULFONYLCYCLOALKANONES TO 1-BENZYLSULFONYL-1-CYCLOALKENES VIA CHELETROPIC RING CONTRA

Toyama, Sachio,Aoyama, Toyohiko,Shioiri, Takayuki

, p. 3032 - 3035 (2007/10/02)

Benzylsulfonyldiazomethane can be used for the ring enlargement of cycloalkanones (1) with various ring sizes.The resulting homologated 2-benzylsulfonylcycloalkanones (2) are easily converted to 1-benzylsulfonyl-1-cycloalkenes (4) by bromination followed

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