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121220-73-3

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121220-73-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 121220-73-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,2,2 and 0 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 121220-73:
(8*1)+(7*2)+(6*1)+(5*2)+(4*2)+(3*0)+(2*7)+(1*3)=63
63 % 10 = 3
So 121220-73-3 is a valid CAS Registry Number.

121220-73-3Downstream Products

121220-73-3Relevant articles and documents

Benzannulation of Cyclopentanone, Cyclohexanone and Cycloheptanone: A Short Synthesis of Indane-5-carboxaldehyde, a Monoterpenoid Constituent of Ammomum medium

Rao, M. Suresh Chander,Rao, G. S. Krishna

, p. 660 - 661 (2007/10/02)

The Vilsmeier reaction on the homoallyl alcohols (1a-c), derived from cyclopentanone, cyclohexanone and cycloheptanone respectively, leads to a mixture of monocarboxaldehydes (2a-c) and dicarboxaldehydes (3a-c) which have been readily separated and characterized.The Vilsmeier route incidentally provides a short synthesis of indane-5-carboxaldehyde (2a), a terpenoid constituent of a medicinal plant.

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