Welcome to LookChem.com Sign In|Join Free

CAS

  • or

675123-17-8

Post Buying Request

675123-17-8 Suppliers

Recommended suppliersmore

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

675123-17-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 675123-17-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,7,5,1,2 and 3 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 675123-17:
(8*6)+(7*7)+(6*5)+(5*1)+(4*2)+(3*3)+(2*1)+(1*7)=158
158 % 10 = 8
So 675123-17-8 is a valid CAS Registry Number.

675123-17-8Relevant articles and documents

Preparation and diels-alder chemistry of 4-vinylimidazoles

Lovely, Carl J.,Du, Hongwang,Sivappa, Rasapalli,Bhandari, Manojkumar R.,He, Yong,Dias, H. V. Rasika

, p. 3741 - 3749 (2008/02/04)

(Chemical Equation Presented) Various 4-vinylimidazole derivatives have been prepared from the corresponding 4-iodoimidazoles or from urocanic acid. Several methods for the elaboration of these vinylimidazoles and their Diels-Alder reactions are reported. All of the vinylimidazoles prepared in the course of this study react with N-phenylmaleimide quite readily with mild thermal activation providing a single cycloadduct, in most cases the initial, nonaromatic adduct. With more electron rich substrates, there is a tendency for these initial cycloadducts to undergo aromatization, ene reaction, and oxidation although this can be circumvented to a large extent by the choice of reaction conditions. Limited reactions were observed with other dienophiles, providing the expected cycloadducts in most cases, although an abnormal adduct was obtained in one case with dimethyl acetylene dicarboxylate. These substrates also participate in regioselective Diels-Alder reactions with monoactivated dienophiles, but require fairly forcing conditions, thus only providing the aromatized cycloadducts in modest yields. An investigation of substituent effects at the 2-position of the imidazole moiety was undertaken, in which electron-donating and weakly electron-withdrawing substituents are tolerated. In addition, several substrates with terminally substituted vinyl moieties have been investigated.

A convenient synthesis of 1,4-disubstituted imidazoles

He, Yong,Chen, Yingzhong,Du, Hongwang,Schmid, Lesley A.,Lovely, Carl J.

, p. 5529 - 5532 (2007/10/03)

An efficient method for the regioselective protection of 4-alkyl-, 4-iodo, 4-vinylimidazoles has been developed via an alkylation-isomerization sequence with various imidazole-protecting groups. The initially formed mixture of 4/5-alkyl-, 4/5-iodo, and 4/5-vinylimidazoles are isomerized to the corresponding 4-isomers on treatment of a DMF solution with a small amount of RX and heating at 75°C.

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 675123-17-8