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4-phenylsulfonyl-2-buten-4-olide is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

125557-05-3

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125557-05-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 125557-05-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,5,5,5 and 7 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 125557-05:
(8*1)+(7*2)+(6*5)+(5*5)+(4*5)+(3*7)+(2*0)+(1*5)=123
123 % 10 = 3
So 125557-05-3 is a valid CAS Registry Number.

125557-05-3Relevant academic research and scientific papers

Synthesis of 3-Methyl-4-substituted Butenolides Using Regioselective Reaction of Phenylsulfonylbutenolide

Yoda, Hidemi,Shirakawa, Koji,Takabe, Kunihiko

, p. 1391 - 1392 (2007/10/02)

The anion of 4-phenylsulfonylbutenolide generated by deprotonation with lithium diisopropylamide reacted with a variety of electrophilic reagents regioselectively to afford 4-alkylated compounds, which were desulfurized in good yields to 4-substituted but

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