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66042-27-1

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66042-27-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 66042-27-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,0,4 and 2 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 66042-27:
(7*6)+(6*6)+(5*0)+(4*4)+(3*2)+(2*2)+(1*7)=111
111 % 10 = 1
So 66042-27-1 is a valid CAS Registry Number.

66042-27-1Downstream Products

66042-27-1Relevant articles and documents

The Reaction of Nitrosocarbonyl Compounds with 2,5-Disubstituted Furans. Synthesis of 1,4,2-Dioxazine and 1,4,2-Dioxazole Derivatives

Mackay, Donald,Dao, Le H.,Dust, Julian M.

, p. 2408 - 2416 (2007/10/02)

Oxidation of hydroxamic acids at room temperature in the presence of 2,5-dimethylfuran gives cis-1,4,2-dioxazolylbutenones (5), the structures of which have been confirmed by the synthesis of the dihydro-derivative (12) from the reaction of benzonitrile oxide with hexane-2,5-dione.If the oxidation is carried out at 0 deg C good yields of the unstable furodioxazines (7), the formal products of the addition of furan to the nitrosocarbonyl-arene or -alkane, can be isolated.Compounds (7) are the precursors to (5) and this isomerisation in the oxidation medium is essentially quantitative.It is probably catalysed by an unidentified component, since when pre-isolated (7) is heated the reaction is solvent-dependent and sometimes complex, the amounts of (5) formed being very variable.Nitrosocarbonylbenzene adds to the unsymmetrical compound 2-methyl-5-phenylfuran only at the 2,3-bond, giving the dioxazine (17) and thence the dioxazole (15) exclusively.Secondary amines add readily to the β-carbon of the enone group in (5) while tertiary amines, or more efficiently iodine, convert (5) into the trans-isomers (11). The retro-reaction of (5c) at 80 deg C to dimethylfuran and p-nitronitrosocarbonylbenzene has been demonstrated by trapping the latter, with 1,4-dimethyl-2,3-diphenylcyclopentadiene, as the adduct (21).

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