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71324-05-5

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71324-05-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 71324-05-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,3,2 and 4 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 71324-05:
(7*7)+(6*1)+(5*3)+(4*2)+(3*4)+(2*0)+(1*5)=95
95 % 10 = 5
So 71324-05-5 is a valid CAS Registry Number.

71324-05-5Upstream product

71324-05-5Relevant articles and documents

Synthesis of s-indacene derivatives by double Robinson-type cyclopentene annulation

Zhang, Yawei,Christoffers, Jens

, p. 3061 - 3067 (2007)

Michael reactions of 2,5-dioxocyclohexane-1,4-dicarboxylates with methyl vinyl ketone yield bis-adducts that can be further cyclized in a Robinson-type annulation to give s-indacene derivatives as single diastereomers. The carboxylate functions of this scaffold can be deprotected and subsequently decarboxylated to yield tricyclic products with a central aromatic ring. Georg Thieme Verlag Stuttgart.

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