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97185-49-4

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97185-49-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 97185-49-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,7,1,8 and 5 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 97185-49:
(7*9)+(6*7)+(5*1)+(4*8)+(3*5)+(2*4)+(1*9)=174
174 % 10 = 4
So 97185-49-4 is a valid CAS Registry Number.

97185-49-4Relevant articles and documents

One-step Synthesis of the Erythrinane Skeleton by Acid-promoted Double Cyclization of N-(Cyclohex-1-enyl)-N--α-(mehylsulphinyl)acetamide and its Derivatives

Ishibashi, Hiroyuki,Sato, Kazumi,Ikeda, Masazumi,Maeda, Hiroshi,Akai, Shuji,Tamura, Yasumitsu

, p. 605 - 610 (2007/10/02)

On being heated with toluene-p-sulphonic acid, N-(cyclohex-1-enyl)-N--α-(methylsulphinyl)acetamide (8) underwent double cyclization to give the erythrinane derivative (11), which was converted into the amide (13) by reduction with Raney nickel and into the enamide (14) by thermolysis of the corresponding sulphoxide.The double cyclization of the sulphoxide (18) gave a stereoisomeric mixture of the ether products (19a) and (19b).On treatment with Raney nickel, either (19a) or (19b) afforded a mixture of the alcohols (20a) and (20b), each o f which was oxidized with chromium trioxide-pyridine to give the same ketone (21).The sulphoxide (25) also cyclized to afford two products (26) and (27), but in low yields, which were desulphurized with Raney nickel to give the erythrinones (28) and (29), respectively.

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