Welcome to LookChem.com Sign In|Join Free

CAS

  • or

471843-19-3

Post Buying Request

471843-19-3 Suppliers

Recommended suppliersmore

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

471843-19-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 471843-19-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,7,1,8,4 and 3 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 471843-19:
(8*4)+(7*7)+(6*1)+(5*8)+(4*4)+(3*3)+(2*1)+(1*9)=163
163 % 10 = 3
So 471843-19-3 is a valid CAS Registry Number.

471843-19-3Downstream Products

471843-19-3Relevant articles and documents

Immobilization does not influence the enantioselectivity of CAL-B catalyzed kinetic resolution of secondary alcohols

Jacobsen, Elisabeth Egholm,Andresen, Liv Siri,Anthonsen, Thorleif

, p. 847 - 850 (2007/10/03)

Decreasing enantioselectivity (E-value) by increasing conversion has been observed in transesterification reactions of secondary alcohols catalyzed by a pure protein formulation of lipase B from Candida antarctica (Novozym 525 F). Addition of a range of e

Water content influences the selectivity of CALB-catalyzed kinetic resolution of phenoxymethyl-substituted secondary alcohols

Jacobsen, Elisabeth Egholm,Anthonsen, Thorleif

, p. 577 - 581 (2007/10/03)

Derivatives of 1-phenoxy-2-alkanols were kinetically resolved by esterification with irreversible and reversible acyl donors using lipase B from Candida antarctica (Novozyme 435) as a catalyst. To optimize the relative rate of reaction (the E-value), esterifications in eight different solvents with different water activities were performed. For 3-bromo-1-phenoxy-2-propanol (1), the E-values in all the solvents were higher when the water activity was increased, while the E-values for 1-phenoxy-2-pentanol (2) and 3-chloro-1-phenoxy-2-propanol (3) decreased by increasing water activity. The water content of the various reaction media with the same water activity was determined. Solvents such as 1,4-dioxane, acetonitrile, and tetrahydrofuran contained much more water than hexane, carbon tetrachloride, cyclohexane, toluene, and benzene. At high-water activity, the high-water content of the former group of solvents resulted in termination of the reaction at low conversion. The reason seemed to be that the acyl donor and possibly also the produced esters were hydrolyzed. This was not the case when the esterification was performed in water-immiscible solvents with the same water activity.

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 471843-19-3