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86971-16-6

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86971-16-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 86971-16-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,6,9,7 and 1 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 86971-16:
(7*8)+(6*6)+(5*9)+(4*7)+(3*1)+(2*1)+(1*6)=176
176 % 10 = 6
So 86971-16-6 is a valid CAS Registry Number.

86971-16-6Relevant articles and documents

Novel Synthesis of the Pyrrolizidine Skeleton by Sulfenocycloamination. Total Synthesis of (+/-)-Retronecine and (+/-)-Turneforcidine

Ohsawa, Tatsushi,Ihara, Masataka,Fukumoto, Keiichiro,Kametani, Tetsuji

, p. 3644 - 3648 (2007/10/02)

The ω-unsaturated amines 1, 6, and 7 were converted into pyrrolidines 4 and 8 and piperidine 9, respectively, by treatment of their hydrochlorides with benzenesulfenyl chloride followed by base-induced ring closure.This novel sulfenocycloamination ring closure was applied to the synthesis of the pyrrolizidine ring (e.g., 20) and to the total synthesis of (+/-)-retronecine (32) and (+/-)-turneforcidine (34).

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