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128269-65-8

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128269-65-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128269-65-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,2,6 and 9 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 128269-65:
(8*1)+(7*2)+(6*8)+(5*2)+(4*6)+(3*9)+(2*6)+(1*5)=148
148 % 10 = 8
So 128269-65-8 is a valid CAS Registry Number.

128269-65-8Relevant articles and documents

Asymmetric induction by chiral heterocyclic compounds: highly diastereoselective reaction of 5-oxa-7,8a-diazaperhydroazulen-8-ones with organometallic reagents

Takahashi, Hiroshi,Morimoto, Ichiro,Higashiyama, Kimio

, p. 287 - 290 (2007/10/02)

1) New chiral heterocyclic compounds, 5-oxa-7,8a-diazaperhydroazulen-8-ones (3a-c), were synthesized from (S)-prolinol (1) and potassium cyanate, followed by the condensation with aldehydes. 2) Extremely high diastereoselective reaction of the 3a-c with diethylzinc proceeded with a facil procedure to give (2S,1'S)-N-1'-arylpropyl-2-hydroxymethyl-1-pyrrolidinecarboxamide (4a-c). 3) The reduction of 4a-c with Red-Al gave (S)-1-aryl-N-methylpropylamines (5a-c) and (S)-prolinol (1) in good yields.

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