Welcome to LookChem.com Sign In|Join Free

CAS

  • or

909255-44-3

Post Buying Request

909255-44-3 Suppliers

Recommended suppliersmore

  • Product
  • FOB Price
  • Min.Order
  • Supply Ability
  • Supplier
  • Contact Supplier

909255-44-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 909255-44-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,0,9,2,5 and 5 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 909255-44:
(8*9)+(7*0)+(6*9)+(5*2)+(4*5)+(3*5)+(2*4)+(1*4)=183
183 % 10 = 3
So 909255-44-3 is a valid CAS Registry Number.

909255-44-3Relevant articles and documents

Electrochemically induced cascade reaction for the assembly of libraries of biologically relevant 1,4-benzoxazine derivatives

Xu, Daiwang,Chiaroni, Angele,Fleury, Maurice-Bernard,Largeron, Martine

, p. 6374 - 6381 (2007/10/03)

The scope and mechanism of an electrochemically induced cascade reaction, which leads to highly substituted 1,4-benzoxazine derivatives, have been explored through the variation of the structure of the o-azaquinone mediator. This reaction sequence, wherein both cycloaddition partners are generated in situ, at room temperature, under metal-free conditions, allows the regiospecific inverse-electron-demand Diels-Alder (IEDDA) reaction of an o-azaquinone heterodiene and a secondary alkylenamine dienophile, two chemically nonaccessible unstable entities. The cascade reaction was found to be general with electron-poor o-azaquinone entities generated from substituted 2-aminoresorcinol substrates. In the case of o-aminophenol derivatives which lack the 2-hydroxyl group, the generated o-azaquinone species failed to catalyze the oxidation of the amine to the corresponding imine, precursor of the enamine dienophile, because the absence of an intramolecular hydrogen bond at the origin of a highly reactive Schiff base cyclic transition state. To overcome this problem, a tandem oxidation-IEDDA reaction, in which the o-azaquinone is generated in the presence of a preformed enamine, has been developed as an alternative. These one-pot methodologies, which offer the opportunity to introduce variations in both cycloaddition partners, should be particularly useful for the development of libraries of biologically relevant 1,4-benzoxazine derivatives.

Post a RFQ

Enter 15 to 2000 letters.Word count: 0 letters

Attach files(File Format: Jpeg, Jpg, Gif, Png, PDF, PPT, Zip, Rar,Word or Excel Maximum File Size: 3MB)

1

What can I do for you?
Get Best Price

Get Best Price for 909255-44-3