80253-10-7

Upstream product

• 89805-70-9 (2-Isopropyl-3,4-dihydro-2λ⁴-isothiochromen-1-yl)-phenyl-methanone 
• 73357-78-5 vinylbenzyl bromide 
• 20607-43-6 sodium isopropanethiolate 
• 38256-56-3 1-(2-bromo-ethyl)-2-bromomethyl-benzene 
• 493-05-0 isochromane 
• 64-17-5 ethanol 
• 67-56-1 methanol 

Relevant academic research and scientific papers

GROUP 8 TRANSITION METAL CATALYSTS AND METHOD FOR MAKING SAME AND PROCESS FOR USE OF SAME IN OLEFIN DISPROPORTIONATION REACTIONS

These catalyst compounds are represented by the formula (I and VI): wherein M is a Group 8 metal; X is an anionic ligand; L is a neutral two-electron donor ligand; A is a monotopic or ditopic chelating ligand. The present invention also relates to an easy applicable catalyst synthesis and the application in different olefin metathesis processes, e.g. Reaction Injection Molding (RIM), rotational molding, vacuum infusion, vacuum forming, process for conversion of fatty acids and fatty acid esters or mixtures thereof, in -olefins, dicarboxylic acids or dicarboxylic esters, etc.

Thermal Reactions of 2-Alkyl (or Aryl)-1-benzoyl-3,4-dihydro-1H-2-thionianaphthalen-1-ides with Compounds possessing an Acidic Hydrogen

Thermal reactions of 2-alkyl-1-benzoyl-3,4-dihydro-1H-2-thionianaphthalen-1-ides (1a-d) in ethanol afforded alkyl o-vinylbenzyl sulphides (2a-d) along with ethyl benzoate, whereas that of the 2-phenyl congener (1e)-gave o-(ethoxymethyl)phenethyl phenyl sulphide (3) together with the sulphide (2e).The ylides (1a and e) reacted with boiling water to afford the benzoates (9a and e).Reactions of the ylides (1a-e) with carboxylic acids and thiols gave the ring-opening products (11)-(17), cleaving the C(1)-S bond.Reactions of the ylide (1a) with succinimide or phthalimide yielded the ring-expansion product 2-phenyl-4,5-dihydro-3,5-benzoxathionine (19).In the reaction of the ylide (1a) with phenol, the product proportions changed with amounts of phenol.When 2 equiv. of phenol were used, the oxathionine (19) was obtained.However, the ring-opening products (22) and (23) were formed by using 10 or 100 equiv. of phenol.These reactions are initiated by protonation on the ylidic carbanion to form the sulphonium salt (5).The conjugate base formed concurrently attacks a different reaction site, viz. a carbonyl carbon, C(1), or a methyl proton of the sulphonium salt (5), depending on its character.

SYNTHESIS AND THERMAL REACTIONS OF 2-ALKYL(OR ARYL)-1-BENZOYL-3,4-DIHYDRO-2-THIANAPHTHALENES

1-Benzoyl-2-methyl-3,4-dihydro-2-thianaphthalene (4a) underwent novel intermolecular 1,4-rearrangement in refluxing toluene to give an enol ether 5a, while rearrangement of 2-phenyl derivative 4e proceeded intramolecularly in refluxing xylene to afford a 1,4-rearranged enol ether 5b.On the other hand, ylides 4a-e were refluxed in alcohols to afford some ring-opened products 10-12.