Welcome to LookChem.com Sign In|Join Free

CAS

  • or

1503-99-7

Post Buying Request

1503-99-7 Suppliers

Recommended suppliersmore

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

1503-99-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1503-99-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,5,0 and 3 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1503-99:
(6*1)+(5*5)+(4*0)+(3*3)+(2*9)+(1*9)=67
67 % 10 = 7
So 1503-99-7 is a valid CAS Registry Number.

1503-99-7Relevant articles and documents

-

Pellicciari et al.

, p. 959 (1979)

-

Ethyl 4-(diethoxyphosphinyl)-3-oxobutanoate: Selective synthesis of β-keto phosphonates

Du Pisani, Charl,Schneider, David F.,Venter, Pieter C. R.

, p. 305 - 314 (2002)

The selective synthesis of ethyl 4-(diethoxyphosphinyl)-3-oxobutanoate (7) and the utilization of its trimethylsilyl enolether (14) in a tandem desilylation Horner-Wittig condensation is illustrated.

Efficient Synthesis of Functionalized β-Keto Esters and β-Diketones through Regioselective Hydration of Alkynyl Esters and Alkynyl Ketones by Use of a Cationic NHC–AuICatalyst

Tarigopula, Chandrahas,Thota, Ganesh Kumar,Balamurugan, Rengarajan

, p. 5855 - 5861 (2016/12/18)

Regioselective hydration of α-alkynyl esters and ketones by using a cationic NHC–AuIcatalyst results in β-keto esters and β-diketones, respectively. Controlled release of water in acetone by aldol self-condensation under the reaction conditions makes acetone as better solvent than 1,4-dioxane/water for the hydration of α-alkynyl esters having sensitive ester moieties.

Oxone-mediated oxidative cleavage of β-keto esters and 1,3-diketones to α-keto esters and 1,2-diketones in aqueous medium

Stergiou, Anastasios,Bariotaki, Anna,Kalaitzakis, Dimitris,Smonou, Ioulia

, p. 7268 - 7273 (2013/08/15)

A versatile and highly efficient method for the direct synthesis of α-keto esters and 1,2-diketones has been developed. This approach utilizes the oxidative cleavage of a variety of β-keto esters and 1,3-diketones mediated by an Oxone/aluminum trichloride system. The simple one-step oxidation reaction proceeded selectively in aqueous media to afford products in high yields, short reaction times, and environmentally benign conditions.

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 1503-99-7