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120342-30-5

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120342-30-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 120342-30-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,0,3,4 and 2 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 120342-30:
(8*1)+(7*2)+(6*0)+(5*3)+(4*4)+(3*2)+(2*3)+(1*0)=65
65 % 10 = 5
So 120342-30-5 is a valid CAS Registry Number.

120342-30-5Relevant articles and documents

Additive-Free Copper(I)-Mediated Synthesis of 5- or 6-Brominated 2-Aryl-1 H-Indole-3-Carboxylates from α,α-Dibromo β-Iminoesters

Li, Zhenfa,Zhao, Lan,Liang, Liuyi,Zhao, Lixin,Li, Fangyi,Wang, Chunhua,Li, Zheng

, p. 1964 - 1971 (2021/02/03)

Additive-free copper(I)-bromide-mediated radical cyclization reactions of α,α-dibromo β-iminoesters were investigated, enabling the synthesis of a series of 5- or 6-brominated 2-aryl-1H-indole-3-carboxylates in moderate to good yields. The mechanistic study showed that (i) the bromine atom originated from the substrates and (ii) the bromination might be related to a 3-bromo-3H indole intermediate via an electrophilic bromine atom transfer. Furthermore, the practicality of this method was demonstrated by gram-scale synthesis and the potential for product derivatization toward other valuable multisubstituted indoles.

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