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157330-99-9

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157330-99-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 157330-99-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,3,3 and 0 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 157330-99:
(8*1)+(7*5)+(6*7)+(5*3)+(4*3)+(3*0)+(2*9)+(1*9)=139
139 % 10 = 9
So 157330-99-9 is a valid CAS Registry Number.

157330-99-9Relevant articles and documents

Stereoselective total syntheses of (-)-desoxoprosopinine and (-)-desoxoprosophylline: Palladium(0)-catalyzed intramolecular N-alkylation for the key piperidine ring formation

Takao,Nigawara,Nishino,Takagi,Maeda,Tadano,Ogawa

, p. 5681 - 5704 (2007/10/02)

Intramolecular N-alkylation of D-glucose-derived substrate 21E proceeded in an S(N)2' mode smoothly in the presence of a Pd(0) catalyst and n-Bu4NI. The major cyclization product, a 2,6-dialkylated piperidine 22t, was effectively converted into the title alkaloids.

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