Welcome to LookChem.com Sign In|Join Free

CAS

  • or

1761-63-3

Post Buying Request

1761-63-3 Suppliers

Recommended suppliersmore

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

1761-63-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1761-63-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,7,6 and 1 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1761-63:
(6*1)+(5*7)+(4*6)+(3*1)+(2*6)+(1*3)=83
83 % 10 = 3
So 1761-63-3 is a valid CAS Registry Number.

1761-63-3Relevant articles and documents

Selective Syntheses Using Cyclodextrin as Catalyst. 1. Control of Orientation in the Attack of Dichlorocarbene at Phenolates

Komiyama, Makoto,Hirai, Hidefumi

, p. 2018 - 2021 (2007/10/02)

4-Hydroxybenzaldehydes, 2,4-dihydroxybenzaldehyde, and 4-(dichloromethyl)-2,5-cyclohexadienones were synthesized in virtually 100percent selectivities and high yields from the corresponding phenols and chloroform in alkaline aqueous solutions by using α- or β-cyclodextrin (α- or β-CD) as catalyst.The regulation of the molar ratio of chloroform to CD below unity throughout the reaction time, by controlling the rate of addition of chloroform, was definitely required to attain high selectivity.Under these conditions, dichlorocarbene, prepared in situ from chloroform and sodium hydroxide, attacked overwhelmingly at the para carbon of phenols with almost perfect suppression of the reaction at the ortho carbon.The structure of the ternary molecular complex composed of β-CD, chloroform, and phenol, formed in the reaction mixture for the selective synthesis of 4-hydroxybenzaldehyde, was determined by NMR spectroscopy.The selective catalysis by CDs was attributed to the regulation of molecular conformation of phenols with respect to chloroform, and thus to dichlorocarbene, in the ternary complex.

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 1761-63-3