Welcome to LookChem.com Sign In|Join Free

CAS

  • or

206191-83-5

Post Buying Request

206191-83-5 Suppliers

Recommended suppliersmore

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

206191-83-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 206191-83-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,6,1,9 and 1 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 206191-83:
(8*2)+(7*0)+(6*6)+(5*1)+(4*9)+(3*1)+(2*8)+(1*3)=115
115 % 10 = 5
So 206191-83-5 is a valid CAS Registry Number.

206191-83-5Downstream Products

206191-83-5Relevant articles and documents

Studies directed to the synthesis of the antifungal antibiotic aleurodiscal. Enantioselective construction of an advanced β-D-xyloside congener

Paquette, Leo A.,Heidelbaugh, Todd M.

, p. 495 - 508 (2007/10/03)

The first synthesis of a highly functionalized congener of aleurodiscal is reported. An enantiocontrolled route to tricyclic ketone 8 was first developed by taking advantage of regiodirected tandem methylation and vinylation of a phenylsulfanyl precursor, as 23 → 24 → 8. These experiments formed the basis for the coupling of 8 to 30, in turn prepared from (4S)-(- )-tert-butyldimethylsiloxycyclopentenone, prior to oxy-anionic Cope rearrangement. Phenylselenenylation of the enolate ion generated in this manner ultimately led to a pair of dienone isomers, whose distinctively different chemistries were made apparent at several levels. Notable features of the overall approach include the introduction of stereogenic centers positioned remotely from each other across a medium-sized ring and stereoselective bond construction via a boatlike transition state following efficient conjoining of the two key segments.

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 206191-83-5