Cas 71730-25-1,3-methylene-4,5,5-triphenyltetrahydrofuran-2-one

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Check Digit Verification of cas no

The CAS Registry Mumber 71730-25-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,7,3 and 0 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 71730-25:
(7*7)+(6*1)+(5*7)+(4*3)+(3*0)+(2*2)+(1*5)=111
111 % 10 = 1
So 71730-25-1 is a valid CAS Registry Number.

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71730-25-1Relevant academic research and scientific papers

Reactivite d'organozinciques allyliques β-fonctionnels γ-substitues. Preparation d'α-methylene γ-butyrolactones β- et γ-substituees

Lambert, Francois,Kirschleger, Bernard,Villieras, Jean

, p. 71 - 86 (2007/10/02)

Stable organozinc compounds derived from alkyl 3-alkyl 2-(bromomethyl) propenoates reacted with ketones and aldehydes to give α-methylene γ-butyrolactones in excellent yields.Different reaction parameters were studied and some transition states were proposed.

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