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74629-93-9

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74629-93-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 74629-93-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,6,2 and 9 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 74629-93:
(7*7)+(6*4)+(5*6)+(4*2)+(3*9)+(2*9)+(1*3)=159
159 % 10 = 9
So 74629-93-9 is a valid CAS Registry Number.

74629-93-9Downstream Products

74629-93-9Relevant articles and documents

Enantiomerically Pure Lactones. 2. Approaches to Cis or Trans Multicyclic Lactones

Pirkle, William H.,Adams, Paul E.

, p. 4111 - 4117 (2007/10/02)

Enantiomerically pure bicyclic lactones 1-3 and tricyclic lactones 4 and 5 have been prepared by either of two procedures, each hinging upon the liquid chromatographic seperation of rationally selected diastereomeric derivatives.After seperation, the diastereomers are converted by a simple high-yield reaction sequence to the enantiomeric multiring lactones, none of which has been previously reported in optically active form. The relative strengths and weaknesses of each approach are discussed.Lactones 4 and 5 were α-methylated, these derivatives being suitable for the determination of enantiomeric purity and absolute configuration using the chiral solvating agent (S)-(+)-2,2,2-trifluoro-1-(9-anthryl)ethanol.

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