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51328-61-1

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51328-61-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 51328-61-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,3,2 and 8 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 51328-61:
(7*5)+(6*1)+(5*3)+(4*2)+(3*8)+(2*6)+(1*1)=101
101 % 10 = 1
So 51328-61-1 is a valid CAS Registry Number.

51328-61-1Relevant articles and documents

Studies on the asymmetric reduction of β-oximino methyl ether boronates: Reagent control, double diastereocontrol and transmitted remote asymmetric induction

Sailes, Helen E.,Watts, John P.,Whiting, Andrew

, p. 3362 - 3374 (2007/10/03)

High asymmetric induction (94% ee) could be obtained in the reduction of the achiral E-oxime ether boronate 5 with a homochiral oxazaborolidine 13-BH3-THF complex. Application of this homochiral reducing agent system to non-aromatic oxime ethers 21 produced low to moderate asymmetric induction. Application of the same homochiral reducing agent system to reduction of homochiral boronate E-oximes 3 and 4 produced extreme double diastereo-selection effects, i.e. 8 and 95% ee respectively, which demonstrated that remote asymmetry was being 'transmitted' by a suitable choice of a 'partner' molecule from the boronate moiety to the oxime during reduction. However, attempts to obtain direct remote asymmetric induction in the reduction of homochiral β-oximino boronate methyl ethers 3 and 4 to the corresponding amines produced zero, with for example BH3-THF complex, up to 28% ee with an Et3N-BH3-THF mixture (after oxidative boronate ester cleavage).

The degradation of hydroxyamine derivatives with phosphoric acid

Auterhoff,Bertram

, p. 881 - 888 (2007/10/04)

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