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1-acetyl-4-chloro-5,5-dimethyl-4-(p-tolylsulfonyl)-2-pyrrazoline is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

128641-87-2

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128641-87-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128641-87-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,6,4 and 1 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 128641-87:
(8*1)+(7*2)+(6*8)+(5*6)+(4*4)+(3*1)+(2*8)+(1*7)=142
142 % 10 = 2
So 128641-87-2 is a valid CAS Registry Number.

128641-87-2Relevant academic research and scientific papers

Dipolar cycloaddition reaction of diazoalkanes with trimethylsilyl substituted alkynes. Steric control of regiochemistry by the trimethylsilyl group

Padwa, Albert,Wannamaker, M. Woods

, p. 1145 - 1162 (1990)

A study of the cycloaddition behavior of several trimethylsilyl substituted alkynes with 2-diazopropane and diazomethane has been carried out. Aryl or alkyl ethynyl sulfones react to give 5-sulfonyl substituted 3H-pyrazoles which extrude nitrogen on photo

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