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257882-74-9

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257882-74-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 257882-74-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,7,8,8 and 2 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 257882-74:
(8*2)+(7*5)+(6*7)+(5*8)+(4*8)+(3*2)+(2*7)+(1*4)=189
189 % 10 = 9
So 257882-74-9 is a valid CAS Registry Number.

257882-74-9Relevant articles and documents

Solvent-regulated coupling of 2-alkynylbenzaldehydes with cyclic amines: Selective synthesis of fused N-heterocycles and functionalized naphthalene derivatives

He, Yan,Fan, Xuesen,Zheng, Zhi,Liu, Qimeng,Zhang, Xinying

supporting information, p. 9053 - 9058 (2020/12/02)

An efficient synthesis of 1,2,3,4-tetrahydrobenzo[g]-quinoline derivatives through PdCl2-catalyzed, TBHP-promoted, and toluene-mediated dehydrogenation/[4+2] cycloaddition of saturated cyclic amines with 2-alkynylbenzaldehydes was developed. On the contrary, when the reaction medium was changed from toluene to DMSO/H2O, another class of important compounds, naphthyl chain amines, formed via a dehydrogenation?intermolecular condensation? C?N bond cleavage?intramolecular condensation pathway, was obtained with good selectivity.

Oxidation of 3-arylisochromans by dimethyldioxirane. An easy route to substituted 3-arylisocoumarins

Bovicelli, Paolo,Lupattelli, Paolo,Crescenzi, Benedetta,Sanetti, Anna,Bernini, Roberta

, p. 14719 - 14728 (2007/10/03)

The selective oxidation of the two different benzylethereal position of 3-arylisochromans by dimethyldioxirane as a function of different substituents on the aromatic rings was studied. The easy oxidation of these compounds was exploited for a new easy ac

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