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1242139-62-3

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1242139-62-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1242139-62-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,4,2,1,3 and 9 respectively; the second part has 2 digits, 6 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1242139-62:
(9*1)+(8*2)+(7*4)+(6*2)+(5*1)+(4*3)+(3*9)+(2*6)+(1*2)=123
123 % 10 = 3
So 1242139-62-3 is a valid CAS Registry Number.

1242139-62-3Downstream Products

1242139-62-3Relevant articles and documents

One-pot three-step synthesis of naphtho[2,3-α]carbazole5,13-diones using a tandem radical alkylation-cyclization-aromatization reaction sequence

Ding, Chunyong,Tu, Shanghui,Yao, Qizheng,Li, Fulong,Wang, Yuanxiang,Hu, Wenxiang,Zhang, Ao

, p. 847 - 853 (2010)

A three-step, one-pot tandem reaction including radical nucleophilic alkylation/cyclization/ aromatization was developed using 0.3 equivalents of silver(I) acetate (AgOAc) as the catalyst and 2 equivalents of ammonium persulfate [(NH4)2S2O8] as the oxidant. This strategy is highly efficient for the assembly of pentacyclic complex carbazoles from aryl-fused bromobenzoquinones and indol-3ylpropanoic acid acids in 52-72% overall yields (three steps). This new approach provides a significant improvement over the previously reported methods and would greatly facilitate analog library construction of pentacyclic complex carbazoles and benefit further biological evaluation of these compounds.

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