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4,5-dibromo-1-methyl-1H-pyrrol-2-carbaldehyde is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

33694-80-3

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33694-80-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 33694-80-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,6,9 and 4 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 33694-80:
(7*3)+(6*3)+(5*6)+(4*9)+(3*4)+(2*8)+(1*0)=133
133 % 10 = 3
So 33694-80-3 is a valid CAS Registry Number.

33694-80-3Upstream product

33694-80-3Relevant academic research and scientific papers

An Improved Method for the Preparation of 1-Methyl-2-formyl-5-bromopyrrole

He, Roderick Hai-Ying,Jiang, Xi-Kui

, p. 786 - 787 (1998)

1-Methyl-2-formyl-5-bromopyrrole 1 was prepared in 48% total yield by initial bromination of the intermediate 1-methyl-2-(5,5-dimethyl-1,3-dioxan-2-yl)pyrrole 5 with N-bromosuccinimide to give the intermediate 1-methyl-2-(5,5-dimethyl-1,3-dioxan-2-yl)-5-bromopyrrole 6, which was finally hydrolyzed to the product 1.

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