Welcome to LookChem.com Sign In|Join Free

CAS

  • or

637337-49-6

Post Buying Request

637337-49-6 Suppliers

Recommended suppliersmore

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

637337-49-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 637337-49-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,7,3,3 and 7 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 637337-49:
(8*6)+(7*3)+(6*7)+(5*3)+(4*3)+(3*7)+(2*4)+(1*9)=176
176 % 10 = 6
So 637337-49-6 is a valid CAS Registry Number.

637337-49-6Relevant articles and documents

Preparation of β2-amino acid derivatives (β2hThr, β2hTrp, β2hMet, β2hPro, β2hLys, pyrrolidine-3-carboxylic acid) by using DIOZ as chiral auxiliary

Gessier, Francois,Schaeffer, Laurent,Kimmerlin, Thierry,Floegel, Oliver,Seebach, Dieter

, p. 2235 - 2249 (2005)

The title compounds were prepared from valine-derived N-acylated oxazolidin-2-ones, 1-3, 7, 9, by highly diastereoselective (≥ 90%) Mannich reaction (→ 4-6; Scheme 1) or aldol addition (→ 8 and 10; Scheme 2) of the corresponding Ti- or B-enolates as the key step. The superiority of the '5,5-diphenyl-4-isopropyl-1,3-oxazolidin-2-one' (DIOZ) was demonstrated, once more, in these reactions and in subsequent transformations leading to various t-Bu-, Boc-, Fmoc-, and Cbz-protected β2-homoamino acid derivatives 11-23 (Schemes 3-6). The use of ω-bromo-acyl-oxazolidinones 1-3 as starting materials turned out to open access to a variety of enantiomerically pure trifunctional and cyclic carboxylic-acid 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 637337-49-6