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170809-21-9

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170809-21-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 170809-21-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,0,8,0 and 9 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 170809-21:
(8*1)+(7*7)+(6*0)+(5*8)+(4*0)+(3*9)+(2*2)+(1*1)=129
129 % 10 = 9
So 170809-21-9 is a valid CAS Registry Number.

170809-21-9Relevant articles and documents

Synthesis of the 8-aminoquinoline antimalarial 5-fluoroprimaquine

O'Neill, Paul M.,Storr, Richard C.,Park, B. Kevin

, p. 4615 - 4622 (2007/10/03)

Several approaches to the synthesis of 5-fluoro-6-methoxy-8- nitroquinoline 5, the key intermediate required for the synthesis of 5- fluoroprimaquine, were investigated. In one approach, 5chloro-6-methoxy-8- nitroquinoline was synthesised and treated with a variety of nucleophilic sources of fluoride. In another approach, electrophilic substitution of 6- methoxy-8-nitroquinoline with (N-fluorosulfonimide, NFSI) was investigated. The final approach to 5 involved a modified Skraup reaction of 5-fluoro-4- methoxy-2-nitroaniline which gave the required intermediate in 30% yield.

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