Welcome to LookChem.com Sign In|Join Free

CAS

  • or

21497-23-4

Post Buying Request

21497-23-4 Suppliers

Recommended suppliersmore

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

21497-23-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21497-23-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,4,9 and 7 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 21497-23:
(7*2)+(6*1)+(5*4)+(4*9)+(3*7)+(2*2)+(1*3)=104
104 % 10 = 4
So 21497-23-4 is a valid CAS Registry Number.

21497-23-4Relevant articles and documents

Ruthenium complex-catalyzed coupling of vinyl halides with olefins

Mitsudo, Take-aki,Takagi, Masakazu,Zhang, Shi-Wei,Watanabe, Yoshihisa

, p. 405 - 414 (1992)

Ruthenium complexes such as Ru(COD)(COT) , catalyze the dehydrohalogenative coupling of vinyl halides with olefins to give the corresponding substituted dienes.Even the sp2-carbon-chloride bond of β-chlorostyrene is activated by ruthenium catalysts.

Catalytic Regio- and Enantioselective Alkylation of Conjugated Dienyl Amides

Guo, Yafei,Kootstra, Johanan,Harutyunyan, Syuzanna R.

, p. 13547 - 13550 (2018/09/25)

A method for catalytic asymmetric alkylation of conjugated dienyl amides has been developed and it allows efficient and high-yielding transformations of a wide range of polyconjugated amides into the corresponding chiral products. Smooth addition of organomagnesium reagents to relatively unreactive dienyl amides with excellent 1,6- and 1,4-selectivities, as well as enantioselectivites above 90 %, is achieved owing to the complementary action of the Lewis acid and a chiral copper-based catalyst.

Oxidative coupling of alkenes with amides using peroxides: Selective amide C(sp3)-H versus C(sp2)-H functionalization

Yang, Xu-Heng,Wei, Wen-Ting,Li, Hai-Bing,Song, Ren-Jie,Li, Jin-Heng

supporting information, p. 12867 - 12869 (2014/12/11)

A new oxidative coupling of unactivated terminal alkenes with amides using peroxides is described, in which mono- and difunctionalization of alkenes are selectively achieved. In this reaction with amides, the chemoselectivity toward the functionalization of the C(sp3)-H bonds adjacent to the nitrogen atom or the functionalization of the carbonyl C(sp2)-H bonds across alkenes relies on the reaction conditions. This journal is

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 21497-23-4