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330957-87-4

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330957-87-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 330957-87-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,3,0,9,5 and 7 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 330957-87:
(8*3)+(7*3)+(6*0)+(5*9)+(4*5)+(3*7)+(2*8)+(1*7)=154
154 % 10 = 4
So 330957-87-4 is a valid CAS Registry Number.

330957-87-4Downstream Products

330957-87-4Relevant articles and documents

MCM-41@Schiff base-Co(OAc)2 as an efficient catalyst for the synthesis of pyran derivatives

Pan, Shiwei,Li, Puhui,Xu, Guihua,Guo, Jingchang,Ke, Libin,Xie, Canquan,Zhang, Zhoucai,Hui, Yonghai

, p. 1353 - 1371 (2019/11/20)

Heterogeneous ordered mesoporous silica materials catalyst, MCM-41@Schiff base-Co(AcO)2, reveals high catalytic performance within the synthesis of pyran derivatives using the multicomponent reaction of aldehydes, malononitrile and 2-naphthol (

Task specific onium salt as soluble support in multicomponent synthesis of 4-aryl-2-amino-3-ethoxycarbonyl-naphthopyrans

Lu, Cuifen,Zhang, Li,Yang, Guichun,Chen, Zuxing

, p. 2469 - 2473 (2011/10/02)

In this paper was presented an application of task specific onium salt as soluble support in multicomponent synthesis of 2-amino-3-ethoxycarbonyl- naphthopyrans. The starting task-specific onium salt was functionalized in good yield with chloroethyl alcohol, followed by three steps containing esterification, three components reaction and cleavage from onium salt to afford naphthopyrans in 60% -88% overall yields. All of the products were characterized by IR, 1H NMR, 13C NMR and MS techniques. In this paper was presented an application of task specific onium salt as soluble support in multicomponent synthesis of 2-amino-3-ethoxycarbonyl-naphthopyrans. The starting task-specific onium salt was functionalized in good yield with chloroethyl alcohol, followed by three steps containing esterification, three components reaction and cleavage from onium salt to afford naphthopyrans in 60%-88% overall yields. All of the products were characterized by IR, 1H NMR, 13C NMR and MS techniques.

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