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102786-83-4

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102786-83-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 102786-83-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,2,7,8 and 6 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 102786-83:
(8*1)+(7*0)+(6*2)+(5*7)+(4*8)+(3*6)+(2*8)+(1*3)=124
124 % 10 = 4
So 102786-83-4 is a valid CAS Registry Number.

102786-83-4Downstream Products

102786-83-4Relevant articles and documents

Ttrihalogenomethylsulphenylation of Tetraisopropyl Methylenebisphosphonates

Blackburn, G. Michael,Maciej, Thomas W.

, p. 1935 - 1940 (2007/10/02)

Trihalogenomethylthiomethylenebisphosphonates, 2CRSCClnF(3-n) (n = 0-2; R = H, Me), are formed by reaction of salts of tetraisopropyl methylenebisphosphonates, 2CRM (M = Li, Na; R = H, Me), with trihalogenomethanesulphenyl chlorides, CClnF(3-n)SCl (n = 0-2).The ester products are transesterified with bromotrimethylsilane and hydrolysed with aqueous methanolic sodium hydroxide to give the corresponding tetrasodium salts of the bisphosphonic acids.The sulphenylation reactions are complex and are facilitated by the use of Lewis acids.Sulphenylations using chlorodifluoro- and dichloro-methanesulphenyl chlorides afford unexpected additional produts arising from chlorine replacement by fluorine.

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