Welcome to LookChem.com Sign In|Join Free

CAS

  • or

199392-90-0

Post Buying Request

199392-90-0 Suppliers

Recommended suppliersmore

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

199392-90-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 199392-90-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,9,3,9 and 2 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 199392-90:
(8*1)+(7*9)+(6*9)+(5*3)+(4*9)+(3*2)+(2*9)+(1*0)=200
200 % 10 = 0
So 199392-90-0 is a valid CAS Registry Number.

199392-90-0Relevant articles and documents

Asymmetric synthesis of α-arylglycinols via additions of lithium methyl p-tolyl sulfoxide to N-(PMP)arylaldimines followed by 'non oxidative' Pummerer reaction

Bravo, Pierfrancesco,Capelli, Silvia,Crucianelli, Marcello,Guidetti, Maurizia,Markovsky, Andrey L.,Meille, Stefano V.,Soloshonok, Vadim A.,Sorochinsky, Alexander E.,Viani, Fiorenza,Zanda, Matteo

, p. 3025 - 3040 (2007/10/03)

The results presented in this paper demonstrate that the stereochemical outcome of the reversible additions of lithium (R)-methyl p-tolyl sulfoxide to N-arylidene-p-anisidines (N-PMP imines) is a function of a) the reaction conditions used and b) the electronic properties of the arylidene moiety on the starting imine. High kinetically controlled (2S,R(S)) diastereoselectivity (-70 °C) was achieved for additions of imines bearing relatively electron-rich N-arylidene groups, while an electron-deficient nature of this group was found to favor the opposite stereochemical outcome. On the other hand, the reactions run under thermodynamically controlled conditions (0 °C) afforded equimolar mixtures of the diastereomeric products regardless of the pattern of substitution on the starting imines. Enantiopure α-arylglycinols were readily synthesized by 'non-oxidative' Pummerer rearrangement of diastereomerically pure β-aryl-β-N-(acyl)aminoalkyl sulfoxides, prepared from the corresponding N-PMP derivatives.

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 199392-90-0