Welcome to LookChem.com Sign In|Join Free

CAS

  • or

25142-45-4

Post Buying Request

25142-45-4 Suppliers

Recommended suppliersmore

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

25142-45-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 25142-45-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,1,4 and 2 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 25142-45:
(7*2)+(6*5)+(5*1)+(4*4)+(3*2)+(2*4)+(1*5)=84
84 % 10 = 4
So 25142-45-4 is a valid CAS Registry Number.

25142-45-4SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 13, 2017

Revision Date: Aug 13, 2017

1.Identification

1.1 GHS Product identifier

Product name 3-benzyl-5-phenylpyrazolidine

1.2 Other means of identification

Product number -
Other names 5-benzyl-3-phenylpyrazole

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:25142-45-4 SDS

25142-45-4Downstream Products

25142-45-4Relevant articles and documents

Highly Efficient Cycloaddition Reaction of 1,3-Diynes with Sodium Azide: A New Way to 5-Substituted-4-acetylene-1H-1,2,3-triazoles

Tang, Jia-Liang,Ming, Ling,Zhao, Xiao-Ming

, p. 1367 - 1370 (2016)

A cycloaddition reaction of a range of 1,3-diynes with sodium azide has been realized, which provided 5-substituted-4-acetylene-1H-1,2,3-triazoles in 75–99% yields. The chemical structures of the new compounds 3 are established by IR, NMR, Mass, and HRMS.

Diazophosphonates: Effective Surrogates for Diazoalkanes in Pyrazole Synthesis

Green, Michael T.,Hayes, Christopher J.,Inman, Martyn,Lewis, William,Moody, Christopher J.,Nicolle, Simon M.,Ruffell, Katie,Smith, Frances R.

, p. 13703 - 13708 (2021/09/09)

Diazophosphonates, readily prepared from α-ketophosphonates by oxidation of the corresponding hydrazones in batch or in flow, are useful partners in 1,3-dipolar cycloaddition reactions to alkynes to give N-H pyrazoles, including the first intramolecular examples of such a process. The phosphoryl group imbues a number of desirable properties into the diazo 1,3-dipole. The electron-withdrawing nature of the phosphoryl stabilizes the diazo compound making it easier to handle, whilst the ability of the phosphoryl group to migrate readily in a [1,5]-sigmatropic rearrangement enables its transfer from C to N to aromatize the initial cycloadduct, and hence its facile removal from the final pyrazole product. Overall, the diazophosphonate acts as a surrogate for the much less stable diazoalkane in cycloadditions, with the phosphoryl group playing a vital, but traceless, role. The cycloaddition proceeds more readily with alkynes bearing electron-withdrawing groups, and is regiospecific with asymmetrical alkynes. The potential of diazophosphonates for use in bioorthogonal cycloadditions is demonstrated by their facile addition to strained alkynes.

Method used for preparing pyrazole compounds in recoverable solvent

-

Paragraph 0031; 0032, (2017/10/07)

The invention provides a method used for preparing pyrazole compounds in a recoverable solvent. According to the method, 1,3-diyne and hydrazine are taken as raw materials, and DMSO/H2O is taken as a reaction solvent. The method comprises following advantages: reaction steps are few; raw materials are cheap; the solvent can be recycled conveniently; reaction conditions are mild; the method is friendly to the environment; product yield is high; purity is high; the obtained product is capable of satisfying requirements on quality of drug intermediates; an ideal approach is provided for industrialized production; and application prospect is promising.

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 25142-45-4