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(3-cyclohexylidene-1,1-difluoro-allyl)-phosphonic acid diethyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

334940-75-9

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334940-75-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 334940-75-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,3,4,9,4 and 0 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 334940-75:
(8*3)+(7*3)+(6*4)+(5*9)+(4*4)+(3*0)+(2*7)+(1*5)=149
149 % 10 = 9
So 334940-75-9 is a valid CAS Registry Number.

334940-75-9Relevant academic research and scientific papers

Synthesis of allenic (α,α-difluoromethylene)phosphonates from propargylic tosylates and acetates

Yokomatsu,Ichimura,Kato,Shibuya

, p. 287 - 289 (2001)

Copper (I) bromide-promoted reactions of bromo[(diethoxyphosphoryl)difluoromethyl]zinc reagent 2 with propargylic tosylates and acetates were examined. The reaction proceeded in an SN2′ manner to give allenic (α,α-difluoromethylene)phosphonates

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