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128812-08-8

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128812-08-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128812-08-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,8,1 and 2 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 128812-08:
(8*1)+(7*2)+(6*8)+(5*8)+(4*1)+(3*2)+(2*0)+(1*8)=128
128 % 10 = 8
So 128812-08-8 is a valid CAS Registry Number.

128812-08-8Downstream Products

128812-08-8Relevant articles and documents

Chiral N,N-Dialkylnorephedrines as Catalysts of the Highly Enantioselective Addition of Dialkylzincs to Aliphatic and Aromatic Aldehydes. The Asymmetric Synthesis of Secondary Aliphatic and Aromatic Alcohols of High Optical Purity

Soai, Kenso,Yokoyama, Shuji,Hayasaka, Tomoiki

, p. 4264 - 4268 (1991)

The chiral N,N-dialkylnorephedrine-catalyzed addition of dialkylzincs to aliphatic and aromatic aldehydes afforded secondary alcohols of high optical purity (to > 95percent ee).Among the N,N-di(primary alkyl)norephedrines, N,N-di-n-butylnorephedrine (DBNE, 3d) was found to be the most effective catalyst. 1-Phenyl-2-(1-pyrrolidinyl)propan-1-ol (3i) and N,N-diallylnorephedrine (3j) were also highly effective catalysts.The method described provides optically active secondary aliphatic alcohols of high optical purity which cannot be prepared by conventional methods.

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