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68840-81-3

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68840-81-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 68840-81-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,8,8,4 and 0 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 68840-81:
(7*6)+(6*8)+(5*8)+(4*4)+(3*0)+(2*8)+(1*1)=163
163 % 10 = 3
So 68840-81-3 is a valid CAS Registry Number.

68840-81-3Relevant articles and documents

ATM KINASE INHIBITORS AND COMPOSITIONS AND METHODS OF USE THEREOF

-

, (2021/06/11)

Provided are certain ATM kinase inhibitors of Formula (I). Also provided herein are compositions of such compounds, and methods of their use.

Pd(OAc)2-catalyzed carbonylation of amines

Orito, Kazuhiko,Miyazawa, Mamoru,Nakamura, Takatoshi,Horibata, Akiyoshi,Ushito, Harumi,Nagasaki, Hideo,Yuguchi, Motoki,Yamashita, Satoshi,Yamazaki, Tetsuro,Tokuda, Masao

, p. 5951 - 5958 (2007/10/03)

A phosphine-free catalytic system [Pd(OAc)2-Cu(OAc) 2-air] induced a substrate-specific carbonylation of amines in boiling toluene under CO gas (1 atm). Symmetrical N,N′-dialkylureas were obtained by the carbonylation of primary amines. N,N,N′-Trialkylureas were selectively formed by addition of a secondary amine to the above reaction vessel. Secondary amines did not give tetraalkylureas. However, dialkylamines with a phenyl group on their alkyl chains, such as N-monoalkylated benzylic amine or phenethylamine derivatives, underwent a direct aromatic carbonylation to afford five- or six-membered benzolactams. In the carbonylation, the chelation effect or steric repulsion between Pd(II) and the meta-substituent in the ortho-palladation and the ring sizes of cyclopalladation products that were formed prior to carbonylation were found to generate good site selectivity and increase the reaction rate. In contrast, carbonylation of ω- arylalkylamines with a hydroxyl group gave neither ureas nor benzolactams but instead produced 1,3-oxazolidinones smoothly. Hydrochlorides of amines also underwent carbonylation to afford the corresponding amides under the conditions used. This procedure made it possible to prepare ureas of amino acid esters and N-alkylcarbamates in practical yields.

Carbon-to-Nitrogen Rearrangement in N-(Arylsulfonoxy)amines as a Route to Azacyclic Compounds

Hoffman, Robert V.,Buntain, Gregory A.

, p. 3316 - 3321 (2007/10/02)

A series of cyclic amines 1-10 was converted to the N-((p-nitrophenyl)sulfonoxy)amine derivatives with (p-nitrophenyl)sulfonyl peroxide.These compounds rearranged to ring-expanded cyclic imines in fair to good yields.Conversion of the amine to its hydroxy

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