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503843-27-4

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503843-27-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 503843-27-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,0,3,8,4 and 3 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 503843-27:
(8*5)+(7*0)+(6*3)+(5*8)+(4*4)+(3*3)+(2*2)+(1*7)=134
134 % 10 = 4
So 503843-27-4 is a valid CAS Registry Number.

503843-27-4Relevant articles and documents

Enantioselective synthesis of piperidine, indolizidine, and quinolizidine alkaloids from a phenylglycinol-derived δ-lactam

Amat, Mercedes,Llor, Nuria,Hidalgo, Jose,Escolano, Carmen,Bosch, Joan

, p. 1919 - 1928 (2003)

Starting from a common lactam, (3R,8aS)-5-oxo-3-phenyl-2,3,6,7,8,8a-hexahydro-5H-oxazolo[3,2-a]pyridine (1), or its enantiomer, the enantioselective synthesis of 2-alkylpiperidines and cis- and trans-2,6-dialkylpiperidines is reported. The potential of this approach is illustrated by the synthesis of the piperidine alkaloids (R)-coniine, (2R,6S)-dihydropinidine, (2R,6R)-lupetidine, and (2R,6R)-solenopsin A, the indolizidine alkaloids (5R,8aR)-indolizidine 167B and (3R,5S,8aS)-monomorine I, and the nonnatural base (4R,9aS)-4-methylquinolizidine.

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