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81659-47-4

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81659-47-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81659-47-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,5 and 9 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 81659-47:
(7*8)+(6*1)+(5*6)+(4*5)+(3*9)+(2*4)+(1*7)=154
154 % 10 = 4
So 81659-47-4 is a valid CAS Registry Number.

81659-47-4Relevant articles and documents

Nicotinic Acid Lariat Ethers: Syntheses, Complexation, and Reduction

Newkome, George R.,Marston, Charles R.

, p. 4238 - 4245 (1985)

Combination of 2-(hydroxymethyl)-5-oxazolinylpyridine 16a with lariat ethers 21 and 23 generated chiral 6-methylnicotinic oxazoline lariat ethers 22 and 24, respectively.Chiral lariat ether 24b by stereoselective metal-directed addition of methylmagnesium bromide was converted to the corresponding enantiomerically enriched N-magnesio-1,4-dihydropyridine 26.Lariat 26 and the nonlariat analogue 31 both reduced α,α,α-trifluoroacetophenone in a NADH model-like reduction to give the S alcohol 32 in low enantiomeric excess.

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