Welcome to LookChem.com Sign In|Join Free

CAS

  • or

25439-60-5

Post Buying Request

25439-60-5 Suppliers

Recommended suppliersmore

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

25439-60-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 25439-60-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,4,3 and 9 respectively; the second part has 2 digits, 6 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 25439-60:
(7*2)+(6*5)+(5*4)+(4*3)+(3*9)+(2*6)+(1*0)=115
115 % 10 = 5
So 25439-60-5 is a valid CAS Registry Number.

25439-60-5Relevant articles and documents

Ethylene Dications Substituted with Electron-Donating Groups

Ohwada, Tomohiko,Shudo, Koichi

, p. 5227 - 5237 (1989)

Direct spectroscopic observations were made of substituted ethylene dications bearing ?-stabilizing groups such as an aryl, a hydroxy, or a methoxy group in a strong acid, trifluoromethanesulfonic acid (TFSA).Based on the spectroscopic evidence, we reached the following conclusions. (1) 1,1-Diaryl-2-hydroxy-2-methoxyethylene dications, 1,1-diaryl-2,2-dihydroxyethylene dications, and 1,1,2-triaryl-2-hydroxyethylene dications are discrete intermediates in the electrocyclization reaction to yield the fluorene and phenanthrol in TFSA. (2) Several dications bearing methoxy substituents on the aromatic rings are formed in trifluoroacetic acid (TFA). (3) NMR spectra suggested the nonplanar structures of O-protonated α-carbonyl diarylmethyl dications at the central C-C bond. (4) 1,2-Diaryl-1,2-dihydroxyethylene dications and 1-aryl-1,2,2-trihydroxyethylene dications are very stable.Ab initio MO calculations showed that 1,2-dihydroxyethylene dications are more stable than 1,1-dihydroxyethylene dications.

A one-pot domino C-H, C-C activation in coumarins: A fast track to 2,3-diaryl benzo[b]furans

Khoobi, Mehdi,Molaverdi, Fatemeh,Jafarpour, Farnaz,Abbasnia, Masoumeh,Kubicki, Maciej,Shafiee, Abbas

supporting information, p. 11713 - 11716 (2015/07/15)

An approach to synthesize 2,3-diaryl benzo[b]furans using coumarins and aryl bromides is developed. This state-of-the-art strategy capitalizes on a palladium-catalyzed one-pot decarbonylative diarylation of coumarins, paving the way to achieve biologicall

Structure-activity relationship of antiestrogens: A study using triarylbutenone, benzofuran, and triarylfuran analogues as models for triarylethylenes and triarylpropenones

Durani,Jain,Saeed,Dikshit,Durani,Kapil

, p. 1700 - 1707 (2007/10/02)

In a study of the structure-activity relationship (SAR) of antiestrogens use has been made of certain 1,2,3-triarylbutenones, of 2-arylbenzofurans carrying aryl or aroyl substituents at C3, and of 2,3,4-triarylfurans as conformationally constra

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 25439-60-5