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79950-49-5

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79950-49-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 79950-49-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,9,9,5 and 0 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 79950-49:
(7*7)+(6*9)+(5*9)+(4*5)+(3*0)+(2*4)+(1*9)=185
185 % 10 = 5
So 79950-49-5 is a valid CAS Registry Number.

79950-49-5Relevant articles and documents

Design and synthesis of new fluorinated ligands for the rhodium-catalyzed hydroformylation of alkenes in supercritical CO2 and fluorous solvents

Bonafoux, Dominique,Zihao, Hua,Wang, Beihan,Ojima, Iwao

, p. 101 - 108 (2001)

Novel fluorous biphenols, 5,5′-[n-C4F9(CH2)3] 2-2,2′-biphenol and 5,5′-[n-C4F9(CH2)3O] 2-3,3′-di-tert-butyl-2,2′-biphenol, as well as enantiopure BINOLs, (S)-6,6′-[n-C4F9(CH2)3] 2-BINOL, (R)-6,6′-[n-C6F13(CH2)3} 2-BINOL, and (S)-6,6′-[n-C8F17(CH2)3] 2-BINOL, are synthesized. These compounds serve as key intermediates for the syntheses of a variety of new fluorous ligands for regioselective and enantioselective catalytic reactions. Novel fluorous [Rf(CH2)3]2-BINAPHOS ligands (Rf = n-C4F9, n-C6F13, and n-C8F17) are successfully synthesized. These new fluorous chiral ligands when used with a rhodium catalyst can achieve comparable or even higher regioselectivity and enantioselectivity in the asymmetric hydroformylation of styrene as compared to those by the Rh-BINAPHOS system.

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