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1277100-30-7

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1277100-30-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1277100-30-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,7,7,1,0 and 0 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1277100-30:
(9*1)+(8*2)+(7*7)+(6*7)+(5*1)+(4*0)+(3*0)+(2*3)+(1*0)=127
127 % 10 = 7
So 1277100-30-7 is a valid CAS Registry Number.

1277100-30-7Relevant articles and documents

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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