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73059-41-3

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73059-41-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 73059-41-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,0,5 and 9 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 73059-41:
(7*7)+(6*3)+(5*0)+(4*5)+(3*9)+(2*4)+(1*1)=123
123 % 10 = 3
So 73059-41-3 is a valid CAS Registry Number.

73059-41-3Relevant articles and documents

Diastereoselective intramolecular meta photocycloaddition of side-chain- substituted 5-(2-methoxyphenyl)pent-1-enes

Timmermans, Johan L.,Wamelink, Marc P.,Lodder, Gerrit,Cornelisse, Jan

, p. 463 - 470 (2007/10/03)

Irradiation of a series of 5-(2-methoxyphenyl)pent-1-enes substituted with a hydroxy or trimethylsilyloxy group at the α-, β-, or γ-position of the side-chain yields in all cases meta photocycloadducts, in which the configuration at the substituted carbon atom is mainly endo. This indicates that the diastereoselectivity originates from minimization of steric interactions between the side-chain substituent and the ortho-methoxy group at the arene unit. Hydrogen bonding does not seem to be involved. The introduction of the side-chain substituents also influences the regioselectivity of the addition: The linear to angular adduct ratios are significantly increased compared to the case of the parent compound.

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