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1023903-94-7

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1023903-94-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1023903-94-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,2,3,9,0 and 3 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1023903-94:
(9*1)+(8*0)+(7*2)+(6*3)+(5*9)+(4*0)+(3*3)+(2*9)+(1*4)=117
117 % 10 = 7
So 1023903-94-7 is a valid CAS Registry Number.

1023903-94-7Relevant articles and documents

Photochemistry of a 9-Dithianyl-Pyronin Derivative: A Cornucopia of Reaction Intermediates Lead to Common Photoproducts

Martínek, Marek,Váňa, Ji?í,?ebej, Peter,Navrátil, Rafael,Slanina, Tomá?,Ludvíková, Lucie,Roithová, Jana,Klán, Petr

, p. 2230 - 2242 (2020)

Leaving groups attached to the meso-methyl position of many common dyes, such as xanthene, BODIPY, or pyronin derivatives, can be liberated upon irradiation with visible light. However, the course of phototransformations of such photoactivatable systems can be quite complex and the identification of reaction intermediates or even products is often neglected. This paper exemplifies the photochemistry of a 9-dithianyl-pyronin derivative, which undergoes an oxidative transformation at the meso-position to give a 3,6-diamino-9H-xanthen-9-one derivative, formic acid, and carbon monoxide as the main photoproducts. The course of this multi-photon multi-step reaction was studied under various conditions by steady-state and time-resolved optical spectroscopy, mass spectrometry and NMR spectroscopy to understand the effects of solvents and molecular oxygen on individual steps. Our analyses have revealed the existence of many intermediates and their interrelationships to provide a complete picture of the transformation, which can bring new inputs to a rational design of new photoactivatable pyronin or xanthene derivatives.

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