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1609939-41-4

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1609939-41-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1609939-41-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,0,9,9,3 and 9 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1609939-41:
(9*1)+(8*6)+(7*0)+(6*9)+(5*9)+(4*3)+(3*9)+(2*4)+(1*1)=204
204 % 10 = 4
So 1609939-41-4 is a valid CAS Registry Number.

1609939-41-4Downstream Products

1609939-41-4Relevant articles and documents

Tunable Synthesis of 3-Hydroxylisoquinolin-1,4-dione and Isoquinolin-1-one Enabled by Copper-Catalyzed Radical 6- endo Aza-cyclization of 2-Alkynylbenzamide

Liu, Renzhi,Li, Meng,Xie, Wenlin,Zhou, Hongwei,Zhang, Yajing,Qiu, Guanyinsheng

, p. 11763 - 11773 (2019/10/02)

In this work, switchable synthesis of isoquinolin-1-one and 3-hydroxylisoquinolin-1,4-dione from 2-alkynylbenzamide is reported. The transformation works well with good yields and a broad reaction scope. The synthetic switch for providing isoquinolin-1-one and 3-hydroxylisoquinolin-1,4-dione is enabled by the use of a N2 or O2 atmosphere. Mechanism studies show that the reaction proceeds in a regioselective manner via a N-center radical 6-endo-dig aza-cyclization pathway.

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