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4-[4-(2-Nitro-phenoxy)-but-2-ynyloxy]-chromen-2-one is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

120642-33-3

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120642-33-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 120642-33-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,0,6,4 and 2 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 120642-33:
(8*1)+(7*2)+(6*0)+(5*6)+(4*4)+(3*2)+(2*3)+(1*3)=83
83 % 10 = 3
So 120642-33-3 is a valid CAS Registry Number.

120642-33-3Relevant academic research and scientific papers

REGIOSELECTIVE SYNTHESIS OF 4-ARYLOXYMETHYL-2H-PYRANOBENZOPYRAN-5H-ONE FROM 1-ARYLOXY-4-BUT-2-YNE

Majumdar, K.C.,Das, D.P.,Khan, A.T.

, p. 2027 - 2036 (2007/10/02)

1-Aryloxy-4-(4'-coumarinyloxy)but-2-yne (1) on refluxing in chlorobenzene gave 4-aryloxymethyl-2H-pyranobenzopyran-5H-one as the single product in almost quantitave yield.All the eight butynes studied underwent sigmatropic rearrangement at t

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