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21549-90-6

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21549-90-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21549-90-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,5,4 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 21549-90:
(7*2)+(6*1)+(5*5)+(4*4)+(3*9)+(2*9)+(1*0)=106
106 % 10 = 6
So 21549-90-6 is a valid CAS Registry Number.

21549-90-6Downstream Products

21549-90-6Relevant articles and documents

Synthesis, photophysical properties, chemo-sensing ability and computational studies of biscoumarin derivatives

Harichandran, G.,Nehru, S.,Surya, C. P.

, (2021/09/20)

Synthesis of biscoumarin derivatives using an environment friendly,recyclable polymeric resin as catalyst via one-pot pseudo-three component reaction was simply achieved by using numerous substituted aromatic aldehydes (1 mM) and 4-hydroxycoumarin (2 mM)

Recyclable Amberlite IR-120 Catalyzed domino reaction: Synthesis, anticancer activity and molecular docking studies of biscoumarins

Harish, B. G.,Ismail,Shadakshari, A. J.,Sowmya, H. B. V.,Suresha Kumara, T. H.,Yamuna, A. J.

, (2021/08/10)

Under mild conditions, an environmentally friendly method has been developed for the synthesis of bis-coumarins by using a reasonably lesser quantity of Amberlite IR-120 through Domino Knoevenagel–Michael reaction. In which, a series of aryl aldehydes hav

Heterogeneous SO3H@Fe3O4 magnetic nanocatalyst as an efficient and reusable medium for the synthesis of 3,3′-(arylmethylene)-bis-(4-hydroxycoumarin), bis-(indolyl)-methane, and 1,8-dioxo-octahydroxanthene derivatives

Wu, Xiaobo,Peng, Wan-Xi

, p. 2129 - 2148 (2020/06/24)

This work aimed to synthesize a new heterogeneous catalyst (SO3H@Fe3O4 magnetic nanoparticles) and the study of its catalytic behavior in synthesizing 3,3′-(arylmethylene)-bis-(4-hydroxycoumarin), bis-(indolyl)-methane, an

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