Welcome to LookChem.com Sign In|Join Free

CAS

  • or

16938-99-1

Post Buying Request

16938-99-1 Suppliers

Recommended suppliersmore

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

16938-99-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 16938-99-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,9,3 and 8 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 16938-99:
(7*1)+(6*6)+(5*9)+(4*3)+(3*8)+(2*9)+(1*9)=151
151 % 10 = 1
So 16938-99-1 is a valid CAS Registry Number.

16938-99-1Relevant articles and documents

Regiospecific Introduction of Amino-alkene Functionality into 1,2,3-Triols, 1,3-Dihalogenopropan-2-ols, and 2,3-Dihalogenopropanols promoted by Fluoride Anion

Shimizu, Makoto,Yoshioka, Hirosuke

, p. 689 - 690 (2007/10/02)

Regiospecific transformations of 1,2,3-triol, 1,3-dihalogenopropan-2-ol, and 2,3-dihalogenopropanol derivatives into oxazolidin-2-ones and/or oxazol-2(3H)-ones promoted by fluoride anion are described.

Specific Enolates from α-Amino Ketones

Garst, Michael E.,Bonfiglio, John N.,Grudoski, David A.,Marks, Jeffrey

, p. 2307 - 2315 (2007/10/02)

The enolization of 11 tertiary α-amino ketones was investigated under three different conditions (kinetic base, thermodynamic base, thermodynamic acid) to determine the directionality of such enolates for application to alkaloid synthesis.The ketone structural variables examined were the geometry of the amine nitrogen lone pair-carbonyl array and the electronic nature of the nitrogen substituent.With the exception of 3-pyrrolidinones, increasing the electron-withdrawing nature of the nitrogen increases the amount of enolization toward nitrogen (3, 6, and 9 or 21, 24, and 27).N-Alkyl-substituted amino ketones (3, 12, 21, 33) under kinetic base conditions yield enolate distributions similar to those of the corresponding all-carbon compounds.N-Carbamato-substituted amino ketones (6, 24, 27, 30) enolize predominantly toward nitrogen under all conditions.The 3-pyrrolidinones 12, 15, and 18 afford enolates away from nitrogen under all 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 16938-99-1