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109328-04-3

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109328-04-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 109328-04-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,3,2 and 8 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 109328-04:
(8*1)+(7*0)+(6*9)+(5*3)+(4*2)+(3*8)+(2*0)+(1*4)=113
113 % 10 = 3
So 109328-04-3 is a valid CAS Registry Number.

109328-04-3Downstream Products

109328-04-3Relevant articles and documents

Pyrylium Compounds. 34. 2-Acetonyl-2H-thiopyrans from 2,4,6-Triarylthiopyrylium Salts

Zimmerman, Thomas,Fischer, Gerhard W.

, p. 573 - 581 (2007/10/02)

2,4,6-Triarylthiopyrylium salts 4 react with acetone in the presence of amine salts of weak acids (e.g. piperidine acetate) to give the hithero unknown 2-acetonyl-2H-thiopyrans 5, the structure of which was established by spectroscopic methods.Depending on the nature of the amine salts used, the enamine 6 or the enol 7 of acetone may function as attacking nucleophile.Using the 2,4,6-triphenyl derivative 5a as model compound, some typical reactions of 2-acetonyl-2H-thiopyrans were studied.With 2,4-dinitrophenylhydrazine, semicarbazide and thiosemicarbazide, the carbonyl derivatives 10a-c are formed.Hydrogen peroxide in acetic acid affords the S,S-dioxide 11.Methanolic sodium methoxide or sodium hydroxide in aqueous ethanol give rise to a ring transformation yielding 1,3,5-triphenylbenzene (12) and 2,4,6-triphenylacetophenone (13).Under similar conditions, benzaldehyde reacts with 5a to give 2',4',6'-triphenylchalcone (14).Perchloric acid regenerates from 5a the initial thiopyrylium perchlorate 4a.

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