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221617-20-5

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221617-20-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221617-20-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,6,1 and 7 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 221617-20:
(8*2)+(7*2)+(6*1)+(5*6)+(4*1)+(3*7)+(2*2)+(1*0)=95
95 % 10 = 5
So 221617-20-5 is a valid CAS Registry Number.

221617-20-5Relevant articles and documents

Transition metal complexes in organic synthesis, part 69. Total synthesis of the Amaryllidaceae alkaloids anhydrolycorinone and hippadine using iron-and palladium-mediated coupling reactions

Kn?lker, Hans-Joachim,Filali, Salima

, p. 1752 - 1754 (2003)

A novel synthesis of the Amaryllidaceae alkaloids anhydrolycorinone and hippadine has been developed using an iron-mediated oxidative alkylamine cyclization and an intramolecular palladium-mediated biaryl coupling as the key steps.

Radical cyclizations. A convergent total synthesis of (±)-γ-Lycorane

Cossy, Janine,Tresnard, Ludovic,Gomez Pardo, Domingo

, p. 1125 - 1128 (2007/10/03)

(±)-γ-Lycorane has been synthesized in 10 steps from piperonylic alcohol. Two radical reactions were used successively to build the D and B rings.

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