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6172-33-4

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6172-33-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 6172-33-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,1,7 and 2 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 6172-33:
(6*6)+(5*1)+(4*7)+(3*2)+(2*3)+(1*3)=84
84 % 10 = 4
So 6172-33-4 is a valid CAS Registry Number.

6172-33-4Downstream Products

6172-33-4Relevant articles and documents

Two-directional synthesis of 2,6-Dimethylpyrrolo-[2,3-f]indole-4,8-dione by double Claisen rearrangement and nitrene cyclization

Visconti, Andrea,Moody, Christopher J.

, p. 705 - 710 (2014)

Double Claisen rearrangement of the bis-allyl ether of 2,5-dichloro-1,4-hydroquinone, followed by alkene isomerization, oxidation and double chloride displacement with azide gives 2,5-diazido-3,6-dipropenyl-1,4-benzoquinone. Upon heating, a double nitrene cyclization occurs completing a high yielding, two-directional route to the pyrrolo[2,3-f]indole-4,8-dione ring system.

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