Welcome to LookChem.com Sign In|Join Free

CAS

  • or

157954-28-4

Post Buying Request

157954-28-4 Suppliers

Recommended suppliersmore

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

157954-28-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 157954-28-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,9,5 and 4 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 157954-28:
(8*1)+(7*5)+(6*7)+(5*9)+(4*5)+(3*4)+(2*2)+(1*8)=174
174 % 10 = 4
So 157954-28-4 is a valid CAS Registry Number.

157954-28-4Relevant articles and documents

Resolution of homoallylic alcohols containing dithioketene acetal functionalities. Synthesis of optically active γ-lactones by a combination of chemical and enzymatic methods

Pai,Fang,Wu

, p. 6018 - 6025 (2007/10/02)

Racemic homoallylic alcohols 1-3 containing dithioketeneacetal functionalities were prepared by addition of aldehydes to the allylic anions of ketene dithioacetals or 2-alkenyl-1,3-dithiane in a regio- and stereoselective manner. Lipase-catalyzed hydrolyses of the corresponding acetates 7-9 afforded optically active alcohols 1-3, which were treated with mercuric chloride to give γ-lactones such as natural hop lactone, whiskey lactone, and cognac lactone.

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 157954-28-4