Welcome to LookChem.com Sign In|Join Free

CAS

  • or

82617-90-1

Post Buying Request

82617-90-1 Suppliers

Recommended suppliersmore

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

82617-90-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 82617-90-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,2,6,1 and 7 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 82617-90:
(7*8)+(6*2)+(5*6)+(4*1)+(3*7)+(2*9)+(1*0)=141
141 % 10 = 1
So 82617-90-1 is a valid CAS Registry Number.

82617-90-1Relevant articles and documents

Knoevenagel condensation of aromatic aldehydes with ethyl 4-Chloro-3-oxobutanoate in ionic liquids

De Paula, Bruno R.S.,Zampieri, Da?vila S.,Zukerman-Schpector, Julio,Tiekink, Edward R.T.,Rodrigues, Jose? Augusto R.,Moran, Paulo J.S.

experimental part, p. 825 - 830 (2012/06/18)

Knoevenagel condensations of aromatic aldehydes with ethyl 4-chloro-3-oxobutanoate catalyzed by morpholine/acetic acid were carried out in ionic liquids to give ethyl 2-chloroacetyl-3-arylpropenoates in 44-84percent yield after 0.5 to 2 h at room temperature (25-28 °C). These conditions represent a greener protocol for the Knoevenagel condensation than those using refluxing benzene or toluene as solvent. Aromatic aldehydes having aryl groups 4-chlorophenyl, 4-methoxyphenyl, 2-thiofuranyl, 2-furanyl, phenyl and 3,4-methylenedioxyphenyl gave (E)/(Z) diastereomeric ratios of products from 56/44 to 85/15. The two isomers of each compound were separately isolated and characterized. The structure of the (E)-isomer of ethyl 2-chloroacetyl-3-(3',4' methylenedioxyphenyl)propenoate was determined by X-ray crystallography and an unequivocal methodology of (E)/(Z)-structural analysis by 13C NMR (nuclear magnetic resonance) is presented.

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 82617-90-1