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859445-20-8

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859445-20-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 859445-20-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,9,4,4 and 5 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 859445-20:
(8*8)+(7*5)+(6*9)+(5*4)+(4*4)+(3*5)+(2*2)+(1*0)=208
208 % 10 = 8
So 859445-20-8 is a valid CAS Registry Number.

859445-20-8Downstream Products

859445-20-8Relevant articles and documents

Unique Synthetic Utility of BF3*OEt2 in the Highly Diastereoselective Reduction of Hydroxy Carbonyl and Dicarbonyl Substrates

Ooi, Takashi,Uraguchi, Daisuke,Morikawa, Junko,Maruoka, Keiji

, p. 2015 - 2018 (2007/10/03)

. A new aspect of commonly used BF3*OEt2 has been illuminated by successfully demonstrating the unique but highly stereoselective reactions of hydroxy carbonyl and dicarbonyl substrates. For example, treatment of γ-hydroxy ketone 1c with BF2*OEt2/Bu3SnH in CH2Cl2 at -78 to -40 deg C afforded the corresponding 1,4-diol 2c with virtually complete diastereoselection, while use of TiCl4 as a Lewis acid under similar reaction conditions caused a total lack of diol yield and selectivity (17%; 2c/3c = 1.2:1), accompanied by a significant formation of 2,3-disubstituted tetrahydrofuran 4 (44%).

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