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31207-73-5

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31207-73-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 31207-73-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,2,0 and 7 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 31207-73:
(7*3)+(6*1)+(5*2)+(4*0)+(3*7)+(2*7)+(1*3)=75
75 % 10 = 5
So 31207-73-5 is a valid CAS Registry Number.

31207-73-5Downstream Products

31207-73-5Relevant articles and documents

Synthesis of Ambrox from labdanolic acid

Castro, Juan M,Salido, Sofía,Altarejos, Joaquín,Nogueras, Manuel,Sánchez, Adolfo

, p. 5941 - 5949 (2002)

A synthesis of the valuable amber-type odorant Ambrox from labdanolic acid (main diterpenoid of the acid fraction of non-polar extracts of Cistus ladaniferus L.) is reported. The conversion is based on (a) the α,β-dehydrogenation of methyl labdanolate using an organoselenium reagent, (b) subsequent oxidative degradations of the side chain, and (c) final acid-promoted cyclization of the resulting tetranorlabdan-8α,12-diol. The influence of the temperature and solvent in the cyclization of the diol with p-toluenesulfonic acid is also described. Thus, Ambrox has been obtained by a six-step procedure in 33% overall yield from methyl labdanolate.

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