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3H-Pyrazole, 4-(3,3-dimethyl-1-butynyl)-4,5-dihydro-3,3-bis(phenylsulfonyl)- is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

189348-87-6

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189348-87-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 189348-87-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,3,4 and 8 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 189348-87:
(8*1)+(7*8)+(6*9)+(5*3)+(4*4)+(3*8)+(2*8)+(1*7)=196
196 % 10 = 6
So 189348-87-6 is a valid CAS Registry Number.

189348-87-6Relevant academic research and scientific papers

A convenient synthesis of alkynylpyrazoles

Yoshimatsu, Mitsuhiro,Kawahigashi, Masataka,Honda, Eiji,Kataoka, Tadashi

, p. 695 - 700 (2007/10/03)

Diazomethane add to the enyne sulfones 1,3,4,6-11 regio- and stereo-selectively to give the 4-alkynyl-5-phenylsulfonyl-4,5-dihydro-3H-pyrazoles 12-15 and 17-19, which are converted by MeLi into the 4-alkynyl-1H-pyrazoles 24, 25, 16, 26, 28, 30 in good yields. 4,5-Bis(alkynyl)-1H-pyrazoles 34, 37 are also obtained by the same procedure.

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