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81708-96-5

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81708-96-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81708-96-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,7,0 and 8 respectively; the second part has 2 digits, 9 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 81708-96:
(7*8)+(6*1)+(5*7)+(4*0)+(3*8)+(2*9)+(1*6)=145
145 % 10 = 5
So 81708-96-5 is a valid CAS Registry Number.

81708-96-5Upstream product

81708-96-5Relevant articles and documents

Improved synthesis of methyl 3-oxo-2,6,6-trimethylcyclohex-1-ene-1- carboxylate, an A-ring intermediate for (±)strigol

Qianchao,Shiqing, Pi,Xinzhi, Chen

, p. 494 - 496 (2007)

Methyl 3-oxo-2,6,6-trimethylcyclohex-1-ene-1-carboxylate was synthesised over eight steps from the starting material of citral instead of α-ionone. KMnO4, HC(OEt)3 and O2/TEMPO/CuCl were substituted for NaIO4, CH3I and pyridinium chlorochromate, respectively. Every step was simplified and gave a 48% overall yield. The procedure is suitable for large scale production.

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