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288321-69-7

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288321-69-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 288321-69-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,8,8,3,2 and 1 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 288321-69:
(8*2)+(7*8)+(6*8)+(5*3)+(4*2)+(3*1)+(2*6)+(1*9)=167
167 % 10 = 7
So 288321-69-7 is a valid CAS Registry Number.

288321-69-7Downstream Products

288321-69-7Relevant articles and documents

Organophosphorus chemistry, 331 on the reaction of tervalent phosphorus nucleophiles with 2-furfurylidene-, and 2-thienylidene-1,3-indandiones

Khidre, Maha D.,Abou-Yousef, Hala M.,Mahran, Mohamed Refat H.

, p. 181 - 194 (2007/10/03)

2-Furfurylidene-. (1a) and 2-thienylidene-1,3-indandione (1b) produce the respective 1:1 adducts (8 a-f) upon reaction with the appropriate dialkyl phosphite (3 a-c). The reaction of 1a,b with trialkyl phosphite (2a-c) yield a mixture of the corresponding phosphonates (7a-d) (major) and (8a-d) (minor). Triphenylphosphine (2d) and hexamethylphosphorustriamide (2e) also reacted with 1a,b. The produced betaines (10a-c) were alkylated with methyl iodide to yield the respective phosphonium iodides (11a-d). Possible reaction mechanisms were discussed. Compatible elemental and spectroscopic results were gained for the new products.

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