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144709-20-6

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144709-20-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 144709-20-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,4,7,0 and 9 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 144709-20:
(8*1)+(7*4)+(6*4)+(5*7)+(4*0)+(3*9)+(2*2)+(1*0)=126
126 % 10 = 6
So 144709-20-6 is a valid CAS Registry Number.

144709-20-6Relevant articles and documents

Phosphazene Superbase-Mediated Regio- and Stereoselective Iodoaminocyclization of 2-(1-Alkynyl)benzamides for the Synthesis of Isoindolin-1-ones

Mehta, Saurabh,Brahmchari, Dhirendra

supporting information, p. 5492 - 5503 (2019/05/10)

Phosphazene superbase P4-t-Bu mediated iodoaminocyclization of 2-(1-alkynyl)benzamides is reported. The reaction works under ambient conditions and instantaneously results in the synthesis of isoindolin-1-ones in 65-97% yields, in a regio- and stereoselective manner. The exclusive formation of products with Z-geometry (across the exo C?C bond) has been confirmed through X-ray crystallography. The methodology also provides an easy access to aristolactams, an important class of natural products. This has been successfully demonstrated by synthesizing two aristolactam derivatives (including Cepharanone B).

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