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4,4,5-trimethyl-3,5-diphenyl-1-(toluene-4-sulfonyl)-4,5-dihydro-1H-pyrazole is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

1190831-15-2

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1190831-15-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1190831-15-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,9,0,8,3 and 1 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1190831-15:
(9*1)+(8*1)+(7*9)+(6*0)+(5*8)+(4*3)+(3*1)+(2*1)+(1*5)=142
142 % 10 = 2
So 1190831-15-2 is a valid CAS Registry Number.

1190831-15-2Relevant academic research and scientific papers

Synthesis of 4,5-dihydro-3,4,4,5,5-pentasubstituted-N-tosyl-1H-pyrazoles

Truong, Phong,Kennedy, G. Davon,Vasquez, Pedro C.,Baumstark

scheme or table, p. 449 - 452 (2010/03/04)

Addition of methyl- or phenyllithium to 3,4,4,5-tetrasubstituted-4H- pyrazoles (1a-b) smoothly produced the extremely air-sensitive anions of 4,5-dihydro-3,4,4,5,5-pentasubstituted-1H-pyrazoles (2a-c) which were converted to the N-tosylated compounds 3a-c in low to very good yields by reaction with tosyl fluoride. The two-step process is a convenient one-pot route to 4,5-dihydro-N-tosyl-1H-pyrazoles.

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