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58749-54-5

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58749-54-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 58749-54-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,8,7,4 and 9 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 58749-54:
(7*5)+(6*8)+(5*7)+(4*4)+(3*9)+(2*5)+(1*4)=175
175 % 10 = 5
So 58749-54-5 is a valid CAS Registry Number.

58749-54-5Relevant articles and documents

Allylation with Pummerer-generated Subtituted Vinylthionium Ions

Hunter, Roger,Michael, Joseph P.,Simon, Clive D.,Walter, Daryl S.

, p. 9365 - 9376 (1994)

Pummerer-derived substituted vinylthionium ions (allyl phenyl sulfoxide, TMSOTf, EtN(i-Pr)2, CH2Cl2, -78 deg C) with a β-trimethylsilylmethyl (2), γ-phenyl (14), or γ-phenylthio (15) group allylate the enol silyl ethers of acetophenone (3) and cyclohexanone (4) in good yield.Allylation with (14) and (15) required slow addition of base in order to limit the rate of production of intermediate, and thus avoid unwanted sila-Pummerer type products.Huenigs's base conjugate addition was not observed in these cases.Both the (E)- and (Z)- forms of allyl sulfoxide (15) were shown to equilibrate to the (E)-transoid conformer prior to allylation resulting in exclusive (E)-vinyl sulfide formation.Blocking of the γ-position resulted in preferential α-attack.

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