Welcome to LookChem.com Sign In|Join Free

CAS

  • or

138749-96-9

Post Buying Request

138749-96-9 Suppliers

Recommended suppliersmore

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

138749-96-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138749-96-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,7,4 and 9 respectively; the second part has 2 digits, 9 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 138749-96:
(8*1)+(7*3)+(6*8)+(5*7)+(4*4)+(3*9)+(2*9)+(1*6)=179
179 % 10 = 9
So 138749-96-9 is a valid CAS Registry Number.

138749-96-9Downstream Products

138749-96-9Relevant articles and documents

Regiochemical Control of the Ring Opening of 1,2-Epoxides by Means of Chelating Processes. 4. Synthesis and Reactions of the cis- and trans-Oxides Derived from 3-cyclohexene

Chini, Marco,Crotti, Paolo,Flippin, Lee A.,Gardelli, Cristina,Macchia, Franco

, p. 1713 - 1718 (2007/10/02)

The synthesis and nucleophilic addition reactions of diastereoisomeric title epoxides cis-7 and trans-8 were studied.While the ring-opening reactions of trans epoxide 8 are rationalized by means of steric, stereoelectronic, and conformational arguments, the analogous reactions of cis epoxide 7 indicate the ability of this isomer to react through chelated intermediates when metal salt catalyst is used.In 7 chelation reaction conditions led to a significant increase of nucleophilic attack on the C-1 oxirane carbon; the lack of reversal of the regiochemistry of the ring opening on passing from nonchelating to chelating reaction conditions suggests that cis epoxide 7 reacts through its more stable conformation in both of the two different operating conditions.

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 138749-96-9