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53751-25-0

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53751-25-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 53751-25-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,3,7,5 and 1 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 53751-25:
(7*5)+(6*3)+(5*7)+(4*5)+(3*1)+(2*2)+(1*5)=120
120 % 10 = 0
So 53751-25-0 is a valid CAS Registry Number.

53751-25-0Relevant articles and documents

Fe-Catalyzed Cycloisomerization of Aryl Allenyl Ketones: Access to 3-Arylidene-indan-1-ones

Teske, Johannes,Plietker, Bernd

, p. 2257 - 2260 (2018/04/27)

A cycloisomerization of aryl allenyl ketones to 3-arylidene-indan-1-ones using a cationic Fe-complex as a catalyst is reported. The catalyst opens a synthetically interesting reaction pathway to this surprisingly underrepresented class of indanones that are not accessible using alternative catalytic systems.

Reaction of furans with trithiazyl trichloride: A new synthesis of isothiazoles

Duan, Xiao-Lan,Perrins, Ross,Rees, Charles W.

, p. 1617 - 1622 (2007/10/03)

Trithiazyl trichloride 1 converts 2,5-diphenylfuran into 5-benzoyl-3-phenylisothiazole 2 regiospecifically and in high yield. This is a new ring opening of furans and a new synthesis of isothiazoles. 2,5-Bis(4-methylphenyl)furan, 3-bromo-2,5-diphenylfuran, 2,3,5-triphenylfuran, 2,5-di-tert-butylfuran and its 3-chloro and 3-bromo derivatives react in an entirely analogous manner to give the corresponding isothiazoles (55-85%) in synthetically useful, one-pot, conversions. 2,5-Diphenylthiophene reacts more slowly with the trimer 1 to give the same product, 2, as the corresponding furan, probably by oxidation of the analogous thiobenzoyl compound by the reagent, which is shown to oxidise thiobenzophenone to benzophenone very rapidly. Tetraphenylcyclopentadienone 8 reacts rapidly with the trimer to give 3,4,5,6-tetraphenyl-2(1H)-pyridone 10 (56%). Possible mechanisms in which the monomer, Cl-S≡N, is the reacting species are proposed for all of these reactions.

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