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218628-44-5

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218628-44-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 218628-44-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,8,6,2 and 8 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 218628-44:
(8*2)+(7*1)+(6*8)+(5*6)+(4*2)+(3*8)+(2*4)+(1*4)=145
145 % 10 = 5
So 218628-44-5 is a valid CAS Registry Number.

218628-44-5Relevant articles and documents

Chemoenzymatic approaches to the montanine alkaloids: A total synthesis of (+)-brunsvigine

Banwell, Martin G.,Kokas, Okanya J.,Willis, Anthony C.

, p. 3503 - 3506 (2008/02/12)

The readily available and enzymatically derived cis-1,2-dihydrocatechols 3a and 3b have been elaborated over 17 steps, including a novel radical addition/elimination sequence, into the enantiomer, (+)-1, of the montanine alkaloid brunsvigine [(-)-1].

Formal synthesis of (±)-pancracine using stereoselective radical cyclization of N-(2-cyclohexenyl)-α-aryl-α-(phenylthio)acetamide

Ikeda, Masazumi,Hamada, Masahiro,Yamashita, Takashi,Ikegami, Fumi,Sato, Tatsunori,Ishibashi, Hiroyuki

, p. 1246 - 1248 (2007/10/03)

(Me3Si)3SiH-mediated 5-exo-trig radical cyclization of N-(2-cyclohexcnyl)-α-aryl-α-(phenylthio)acetamide 19 proceeded in a stereoselective manner to give (3R*,3aS*,7aS*)-3-aryloctahydroindol-2-one 20. The product was transformed into the key intermediate 25 for the synthesis of (±)-pancracine (1), a montanine-type Amaryllidaceae alkaloid.

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