Welcome to LookChem.com Sign In|Join Free

CAS

  • or

190065-71-5

Post Buying Request

190065-71-5 Suppliers

Recommended suppliersmore

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

190065-71-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 190065-71-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,0,0,6 and 5 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 190065-71:
(8*1)+(7*9)+(6*0)+(5*0)+(4*6)+(3*5)+(2*7)+(1*1)=125
125 % 10 = 5
So 190065-71-5 is a valid CAS Registry Number.

190065-71-5Downstream Products

190065-71-5Relevant articles and documents

Gas-phase Heteroaromatic Substitution. Part 6. Alkylation of Pyrrole, N-Methylpyrrole, Furan, and Thiophene by Isopropyl Cation

Laguzzi, Giuseppe,Speranza, Maurizio

, p. 857 - 866 (2007/10/02)

Isopropyl cation, obtained in the dilute gas state from the γ-radiolysis of propane, has been allowed to react with pyrrole (1), N-methylpyrrole (2), furan (3), and thiophene (4), both neat and in competition with benzene, in the pressure range 50-760 Torr, and in the presence of variable concentrations of a gaseous base (NMe3).Both the reactivity of the selected heteroatomic compounds and the isomeric distribution of their isopropylated derivatives depend upon the total pressure of the system and the concentration of NMe3.The apparent heteroaromatic substrate (S) vs. benzene (B) selectivity kS/kB ratios decrease slightly with increasing pressure.At atmospheric pressure, the kS/kB ratios for pyrroles are found to increase with NMe3 concentrations reaching a value of 0.7 (1) and 0.8 (2) at the highest base concentration .The kS/kB values concerning furan and thiophene are found to decrease slightly with the NMe3 concentration, levelling off to 0.3 (3) and 0.8 (4) at P(NMe3) 10 Torr.Under the same conditions, predominant β substitution takes place in pyrroles , whereas α-attack is favoured in the case of furan (β:α 29:71).Thiophene (4) displays no significant positional discrimination (β:α 49:51).The mechanism of substitution, and the subsequent isomerization and dealkylation processes, are discussed, and the substrate and positional selectivity of i-C3H7+ compared with that of related gaseous alkylating reactants.The hypothesis of gas-phase electrophilic alkylation reactions of simple five-membered heteroaromatic compounds regulated essentially by electrostatic interations within the encounter pair is confirmed in the present study.

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 190065-71-5