40316-66-3

Upstream product

• 118-93-4 o-hydroxyacetophenone 
• 21615-34-9 2-Methoxybenzoyl chloride 
• 579-75-9 2-Methoxybenzoic acid 
• 606-45-1 2-methoxybenzoic acid methyl ester 
• 119-36-8 methyl salicylate 

Downstream Products

• 35244-11-2 2'-hydroxyflavone 
• 1313861-85-6 1-methyl-5-(2'-hydroxyphenyl)-3-(2''-methoxyphenyl)pyrazole 
• 19725-47-4 2'-methoxyflavone 

Relevant academic research and scientific papers

Synthesis and solid state self-assembly of a 1,4-diazepine derivative: Water cluster as molecular glue and conformational isomerism

Diazepine (a seven membered heterocycle) derivatives have emerged as “privileged structures” in chemical biology and medicinal chemistry. In this article, synthesis of a 1, 4-diazepine derivative 4 from flavone 3 in excellent yield is described. The solid state self-assembly pertaining to diazepine derivative 4 was investigated with X-ray crystallography. Fascinatingly, the solid state structure of 4 represents a remarkable example of water cluster acting as structural glue to instigate conformational isomerism and hence facilitate the crystallization process by compensating the imbalance of hydrogen-bond donors and acceptors. NBO and QTAIM based calculations show that the hydrogen-bonding network of water molecules and hyper conjugative interactions play a vital role for stabilization of structure in the solid state. To our knowledge, presented here is the first illustration of any solvent cluster stabilizing the solid-state structure in a diazepine family. In addition, the crystal structure of flavone 3 hitherto not reported is also reported.

Novel Bifunctionalization of Activated Methylene: Base-Promoted Trifluoromethylthiolation of β-Diketones with Trifluoromethanesulfinyl Chloride

A novel bifunctionalization of activated methylene was achieved successfully through the base-promoted trifluoromethylthiolation of β-diketones or β-ketoesters with trifluoromethanesulfinyl chloride. A series of α-trifluoromethylthiolated α-chloro-β-diketones and α-chloro-β-ketoesters were obtained in moderate to good yields under mild conditions. When β-diketones containing a phenyl group with a hydroxyl or amino substituent at the ortho position were used as substrates, intramolecular trifluoromethylthiolation/cyclization reaction took place to give the corresponding cyclic products. Furthermore, the protocol could be extended to perfluoroalkylthiolation with the sodium perfluoroalkanesulfinate/POCl3 system. On the basis of experimental results, plausible mechanisms are proposed.

Metal-free Synthesis of Spiro-2,2′-benzo[b]furan-3,3′-ones via PhI(OAc)2-Mediated Cascade Spirocyclization

Treating the benzyl protected 3-hydroxy-1,3-bis(2-hydroxyphenyl)prop-2-en-1-ones solely with PhI(OAc)2 (PIDA) in DCE at room temperature readily furnished the seldom studied spiro-2,2′-benzo[b]furan-3,3′-ones in satisfactory to excellent yields. The hypervalent iodine reagent enables the metal-free cascade spirocyclization resulting in the dual oxidative C?O bond formation. (Figure presented.).

SYNTHESIS OF TETRACYCLIC FLAVONOIDS

The disclosure provides tetracyclic flavonoids of Formula I: and methods of making and using the same.

Synthesis and characterization of 2-(2-hydroxyphenyl)-4-aryl-1,5-benzodiazepines

Four benzodiazepine derivatives, reported earlier by other authors, were resynthesized and characterized by NMR, IR, GC/MS and elemental analysis. Three of the four compounds have melting points different from those initially reported by 35-70° C. The dif