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223674-20-2

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223674-20-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 223674-20-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,3,6,7 and 4 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 223674-20:
(8*2)+(7*2)+(6*3)+(5*6)+(4*7)+(3*4)+(2*2)+(1*0)=122
122 % 10 = 2
So 223674-20-2 is a valid CAS Registry Number.

223674-20-2Relevant articles and documents

Total synthesis of lennoxamine and chilenine via ring-expansion of isoindoloisoquinoline to isoindolobenzazepine

Koseki, Yuji,Katsura, Shinya,Kusano, Shuichi,Sakata, Harumi,Sato, Hiroto,Monzene, Yoshinori,Nagasaka, Tatsuo

, p. 527 - 540 (2007/10/03)

Convenient synthesis of the benzazepine alkaloids, lennoxamine (1) and chilenine (2), is described. The key steps are conversion of methylenelactam (5) to an N-tertiary acyliminium ion precursor (16) and a novel expansion of the six-membered ring of 4 to a benzazepine ring system (3b), which could be transformed into lennoxamine (1) and chilenine (2).

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