Welcome to LookChem.com Sign In|Join Free

CAS

  • or

21503-19-5

Post Buying Request

21503-19-5 Suppliers

Recommended suppliersmore

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

21503-19-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21503-19-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,5,0 and 3 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21503-19:
(7*2)+(6*1)+(5*5)+(4*0)+(3*3)+(2*1)+(1*9)=65
65 % 10 = 5
So 21503-19-5 is a valid CAS Registry Number.

21503-19-5Relevant articles and documents

Chan-Lam-Type C-S Coupling Reaction by Sodium Aryl Sulfinates and Organoboron Compounds

Lam, Long Yin,Ma, Cong

supporting information, p. 6164 - 6168 (2021/08/16)

A Chan-Lam-Type C-S coupling reaction using sodium aryl sulfinates has been developed to provide diaryl thioethers in up to 92% yields in the presence of a copper catalyst and potassium sulfite. Both electron-rich and electron-poor sodium aryl sulfinates and diverse organoboron compounds were tolerated for the synthesis of aryl and heteroaryl thioethers and dithioethers. The mechanistic study suggested that potassium sulfite was involved in the deoxygenation of sulfinate through a radical process.

Achieving Nickel Catalyzed C-S Cross-Coupling under Mild Conditions Using Metal-Ligand Cooperativity

Sikari, Rina,Sinha, Suman,Das, Siuli,Saha, Anannya,Chakraborty, Gargi,Mondal, Rakesh,Paul, Nanda D.

, p. 4072 - 4085 (2019/04/01)

A simple and efficient approach of C-S cross-coupling of a wide variety of (hetero)aryl thiols and (hetero)aryl halides under mild conditions, mostly at room temperature, catalyzed by well-defined singlet diradical Ni(II) catalysts bearing redox noninnocent ligands is reported. Taking advantage of ligand centered redox events, the high-energetic Ni(0)/Ni(II) or Ni(I)/Ni(III) redox steps were avoided in the catalytic cycle. The cooperative participation of both nickel and the coordinated ligands during oxidative addition/reductive elimination steps allowed us to perform the catalytic reactions under mild conditions.

Copper(I)-catalyzed S-arylation of thiols with activated aryl chlorides on water

Herrero, María Teresa,SanMartin, Raul,Domínguez, Esther

experimental part, p. 1500 - 1503 (2009/05/07)

Copper chloride-catalyzed S-arylation of arenethiols is effected with activated aryl chlorides in neat water by using ethylenediamine as the pair ligand/base. This convenient, environmentally more friendly procedure for the coupling of aryl chlorides allows the arylation between sterically demanding coupling partners.

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 21503-19-5