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301663-72-9

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301663-72-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 301663-72-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,1,6,6 and 3 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 301663-72:
(8*3)+(7*0)+(6*1)+(5*6)+(4*6)+(3*3)+(2*7)+(1*2)=109
109 % 10 = 9
So 301663-72-9 is a valid CAS Registry Number.

301663-72-9Relevant articles and documents

Stereocontrolled ring-opening of some enantiomerically enriched epoxy ketones and epoxy alcohols using trimethylaluminium: Synthesis of (S)-2-arylpropanoic acids

Carde, Lydia,Davies, D. Huw,Roberts, Stanley M.

, p. 2455 - 2463 (2000)

Poly-(D)-leucine-catalysed epoxidation of chalcone furnished epoxide (+)-6; treatment of this epoxide with trimethylaluminium followed by zinc borohydride reduction and oxidative cleavage furnished (S)-2-phenylpropanoic acid 11. In a complementary sequence epoxy ketones (-)-6 and 25 were converted into (S)-2-phenylpropanoic acid and (S)-fenoprofen 5 respectively by reduction with zinc borohydride, reaction with trimethylaluminium and oxidative cleavage. Similarly epoxy ketones (-)-6, 21 and 28 were treated with methylmagnesium iodide, trimethylaluminium and the resultant alcohols subjected to oxidative cleavage to afford (S)-2-phenylpropanoic acid (from the first two substrates) and (S)-naproxen 1.

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