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7492-40-2

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7492-40-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 7492-40-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,4,9 and 2 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 7492-40:
(6*7)+(5*4)+(4*9)+(3*2)+(2*4)+(1*0)=112
112 % 10 = 2
So 7492-40-2 is a valid CAS Registry Number.

7492-40-2Relevant articles and documents

Novel access to carbonyl and acetylated compounds: The role of the tetra-: N -butylammonium bromide/sodium nitrite catalyst

Sheykhan, Mehdi,Moafi, Hadi Fallah,Abbasnia, Masoumeh

, p. 51347 - 51355 (2016/06/09)

A novel aerobic oxidation of alcohols without the use of any oxidants was developed. An equimolar catalytic mixture of tetra-n-butylammonium bromide and sodium nitrite catalyzes the aerobic selective oxidation of benzylic alcohols under oxidant-free, base-free and metal-free conditions. The mild reaction conditions allow oxidation of a wide range of benzylic alcohols, chemo-selectively to their carbonyl compounds (68-93% isolated yields). More importantly, high selectivity among different kinds of alcohols (aromatic vs. aliphatic alcohols, primary vs. secondary alcohols as well as alcohols having neutral rings vs. electron-deficient rings) is available by this approach. The method surprisingly switched over to be an efficient acetylation approach in the case of aliphatic alcohols without the use of any transition metal, phosphorous or other toxic reagents or any need for using toxic acyl halides, sulfonyl halides, anhydrides, etc. by the use of only acetic acid as a reagent.

Solvent-free transesterification in a ball-mill over alumina surface

Chatterjee, Tanmay,Saha, Debasree,Ranu, Brindaban C.

experimental part, p. 4142 - 4144 (2012/08/28)

An efficient procedure for transesterification has been developed in a ball-mill in the absence of any solvent, acid/base or metal catalyst. A variety of methyl, ethyl, allyl esters have been transesterified to higher benzyl and other esters in high yields by this procedure.

Method for producing Suzuki coupling compound catalysed by a nickel compound

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Page 9-11, (2008/06/13)

There are disclosed a method for producing a cross-coupling compound of formula (3):(Y-)(n-1)R1-R2-(R1)(n'-L) ???wherein R1 represents ???a substituted or unsubstituted, linear, branched, or cyclic hydrocarbon group, and ???n and n' each represent 1 or 2, ???provided that when n and n' are the same, both n and n' are not 2, ???R2 represents a substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl or substituted or unsubstituted alkenyl group, ???and ???Y represents R2 or X1, wherein R2 is as defined above, and X1 represents a chlorine, bromine or iodine atom, ???which method comprises reacting ???an organic halide of formula (1):n'(R1X1?n), ???wherein R1 is as defined above and carbon atoms at the α and β positions relative to X1 are sp3 carbon atoms, and X1, n and n' are as defined above, ???with a boron compound of formula (2):m{R2(BX2?2)n'}, ???wherein R2 and n' are as defined above, ???X2 independently represents a hydroxyl group or an alkoxy or aryloxy group, or X22 together form an alkoxy or aryloxy group, and m represents 1 or 2, and m≤n, and the boron atom is bonded with an sp2 carbon atom of R2 group, or a boronic acid trimer anhydride thereof, in the presence of a base and a catalyst comprising a nickel compound and a compound of formula (i): ???wherein R3 represents a substituted or unsubstituted alkyl group, ???R4 represents a hydrogen atom or a substituted or unsubstituted alkyl group, ???1 represents an integer of 1 to 3, and ???p and q each represents an integer of 0 to 2; and a catalyst.

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