Welcome to LookChem.com Sign In|Join Free

CAS

  • or

107957-81-3

Post Buying Request

107957-81-3 Suppliers

Recommended suppliersmore

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

107957-81-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 107957-81-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,7,9,5 and 7 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 107957-81:
(8*1)+(7*0)+(6*7)+(5*9)+(4*5)+(3*7)+(2*8)+(1*1)=153
153 % 10 = 3
So 107957-81-3 is a valid CAS Registry Number.

107957-81-3Relevant articles and documents

1,5-DICARBONYL COMPOUNDS A GENERAL PREPARATION METHOD

Duhamel, P.,Hennequin, L.,Poirier, J. M.,Tavel, G.,Vottero, C.

, p. 4777 - 4786 (1986)

In this report, a general method for the preparation of 1,5-dicarbonyl compounds and six membered ring annelation is described.This method involves the reaction of hemiacetal vinylogs 1 with enol ethers 2 or 3 in the presence of a Lewis acid.This reaction was successfully applied to the enol ethers of α and α,α'-hindered ketones such as 2,2,6-trimethyl cyclohexanone. α-Cyperone and 6-epi-α-cyperone were obtained using this process.

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 107957-81-3