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98815-40-8

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98815-40-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 98815-40-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,8,1 and 5 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 98815-40:
(7*9)+(6*8)+(5*8)+(4*1)+(3*5)+(2*4)+(1*0)=178
178 % 10 = 8
So 98815-40-8 is a valid CAS Registry Number.

98815-40-8Downstream Products

98815-40-8Relevant articles and documents

Stereoselective and catalytic access to β-enaminones: An entry to pyrimidines

Gayon, Eric,Szymczyk, Monika,Vrancken, Emmanuel,Campagne, Jean-Marc,Gerard, Helene

, p. 9205 - 9220,16 (2012/12/11)

We describe herein a highly stereoselective access to Cbz-protected β-enaminones 2 based on the NaOH catalyzed rearrangement of propargylic hydroxylamines 1. The synthetic potential of these β-enaminones is illustrated in an original synthesis of pyrimidi

Metal-carbonyl-Induced Reaction of Isoxazoles. Ring Cleavage and Reduction by Hexacarbonylmolybdenum, Pentacarbonyliron, or Nonacarbonyldi-iron

Nitta, Makoto,Kobayashi, Tomoshige

, p. 1401 - 1406 (2007/10/02)

In the presence of and water the isoxazoles (1a-f) undergo thermally induced reductive cleavage of the N-O bond to give β-amino enones in good yield.Similar results were obtained by the use of and water with photoirradiation, or of and water with heating.A mechanism involving an N-complexed isoxazolepentacarbonylmolybdenum or isoxazoletetracarbonyliron, and a - or -complexed (β-oxo vinyl)nitrene intermediate is proposed for the reactions.The complexed nitrene moiety could be reduced by the central metal in the presence of water to give amine.Furthermore, treatment of 2-benzoyl- 3-phenyl-2-H-azirine (8a), which is an isomer of 3,5-diphenylisoxazole, with the metal carbonyls and water also resulted in the formation of a β-amino enone possibly via the corresponding complexed (β-oxo vinyl)nitrene.An N-complexed isoxazole-pentacarbonylmolybdenum intermediate was prepared by the photoreaction of with 3,5-dimethylisoxazole.Its characterization, and chemical transformations, have been carried out to investigate the proposed mechanism.

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