Welcome to LookChem.com Sign In|Join Free

CAS

  • or

131751-34-3

Post Buying Request

131751-34-3 Suppliers

Recommended suppliersmore

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

131751-34-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131751-34-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,7,5 and 1 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 131751-34:
(8*1)+(7*3)+(6*1)+(5*7)+(4*5)+(3*1)+(2*3)+(1*4)=103
103 % 10 = 3
So 131751-34-3 is a valid CAS Registry Number.

131751-34-3Downstream Products

131751-34-3Relevant articles and documents

Kinetics of trans-cinnamic anhydride reactions catalyzed by pyridine, 4-dimethylaminopyridine, and N-methylimidazole

Lin,Connors

, p. 235 - 238 (1981)

-

Regioselective hydrocarbonylation of phenylacetylene to α,β-unsaturated esters and thioesters with Fe(CO)5and Mo(CO)6

Iranpoor, Nasser,Firouzabadi, Habib,Riazi, Asma,Pedrood, Keyvan

, p. 67 - 73 (2016/08/30)

A highly regioselective hydrocarbonylation of phenylacetylene with thiols and alcohols was developed using metal carbonyls/diazabicyclo[2.2.2]octane (DABCO) system at 100?°C in DMF. The use of Mo(CO)6and thiols in the presence of DABCO was applied as an efficient Pd-free method for hydrothiocarbonylation of phenylacetylene into trans-α,β-cinamyl thioesters in excellent yields (88–98%). Similar reaction using Fe(CO)5/ROH/DABCO system resulted into high yield synthesis of trans-α,β-cinamyl esters (87–98%). These reactions were conducted under mild reaction conditions without the need to use gaseous CO or any phosphine ligand and palladium catalyst.

Palladium(II)-catalyzed catalytic aminocarbonylation and alkoxycarbonylation of terminal alkynes: Regioselectivity controlled by the nucleophiles

Suleiman, Rami,Tijani, Jimoh,El Ali, Bassam

experimental part, p. 38 - 46 (2010/10/02)

The aminocarbonylation and alkoxycarbonylation reactions of terminal alkynes took place smoothly and efficiently using a catalyst system Pd(OAc) 2-dppb-p-TsOH-CH3CN-CO under relatively mild experimental conditions. The catalytic system was tested and optimized using two different nucleophiles: alcohols and amines. Phenylacetylene (1a) was considered as an alkyne along with diisobutylamine (2b1) andmethanol (2c1) as nucleophiles. The results showed significant differences in the conversion of 1a and in the selectivity towards the gem or trans unsaturated esters or amides with these nucleophiles. The effects of the type of palladium catalysts, the type of ligands, the amount of dppb and the solvents were carefully studied. With diisobutylamine (2b1), excellent regioselectivity towards the 2-acrylamides (gem isomer, 3ab1) was almost always observed, while trans-α,β-unsaturated esters 4ac1 was the predominant product with methanol (2c1) as a nucleophile. This remarkable sensitivity in the selectivity of the reaction indicates two different possible mechanistic pathways for these carbonylation reactions. Copyright

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 131751-34-3