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129505-09-5

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129505-09-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 129505-09-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,5,0 and 5 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 129505-09:
(8*1)+(7*2)+(6*9)+(5*5)+(4*0)+(3*5)+(2*0)+(1*9)=125
125 % 10 = 5
So 129505-09-5 is a valid CAS Registry Number.

129505-09-5Relevant articles and documents

Asymmetric Synthesis of α-Amino Acids and α-N-Hydroxyamino Acids from N-Acylbornane-10,2-sultams: 1-Chloro-1-nitrosocyclohexane as a Practical +> Equivalent

Oppolzer, Wolfgang,Tamura, Osamu,Deerberg, Joerg

, p. 1965 - 1978 (2007/10/02)

Successive treatment of N-acylsultams 3 with sodium hexamethyldisilazide, 1-chloro-1-nitrosocyclohexane (1), and aq.HCl gave diastereoisomerically pure, crystalline N-hydroxyamino-acid derivatives 5.These were converted into various amino acids 7, N-hydroxyamino acids 8, and an N-Boc-amino acid 9. (S,S)-Isoleucine (17) and (S,S)-2-acetamido-3-phenylbutyric acid (23) were obtained from N-crotonoylsultam 15 via 1,4-addition of an organomagnesium or organocopper reagent followed by enolate 'amination' with 1.

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