3993-44-0

Upstream product

• 3993-43-9 7-allyloxy-4,8-dimethyl-2H-chromen-2-one 
• 4115-76-8 4,8-dimethyl-7-hydroxycoumarin 

Downstream Products

• 135580-28-8 7,8-dihydro-4,10-dimethyl-2-oxo-2H,6H-benzo <1,2-b:5,4-b'> dipyran-7-yl-3-chlorobenzoate 
• 3902-71-4 trioxsalen 
• 141536-65-4 4,10-Dimethyl-pyrano[3,2-g]chromene-2,8-dione 
• 893413-54-2 6-allyl-4,8-dimethyl-7-prop-2-ynyloxy-chromen-2-one 
• 15912-90-0 4,8-dimethylpsoralen 
• 1046271-82-2 C₂₁H₁₇IO₄ 
• 1046271-84-4 C₂₁H₁₉IO₃ 
• 1046271-83-3 C₂₁H₁₉BrO₃ 

Relevant academic research and scientific papers

A new route to pyranocoumarins and their benzannulated derivatives

A new protocol based on sequential applications of three atom-economic processes viz. Claisen rearrangement, olefin isomerisation, and ring-closing diene metathesis has been developed to access a range of linear and angularly fused pyranocoumarin derivatives. Incorporation of enyne (in place of diene) metathesis and Diels-Alder reaction in the sequence has allowed the corresponding benzannulated derivatives to be prepared in good yields.

Sequential Claisen rearrangement and intramolecular Heck reaction as a route to medium-ring oxacycle-fused heterocycles

A synthetic strategy based on tandem application of Claisen rearrangement and intramolecular Heck reaction as key steps has been developed for the synthesis of various hitherto unknown benzoxocine- and benzoxonine-fused coumarin and quinolone derivatives.

Synthesis of polycyclic coumarin derivatives by combined Claisen rearrangement, ring-closing metathesis, and Diels-Alder reaction

A new route to several hitherto unknown linearly and angularly architectured polycyclic coumarin derivatives has been developed involving tandem applications of three atom economic processes viz. Claisen rearrangement, ring-closing enyne metathesis, and D

DDQ Oxidation of 6- or 8-Allyl-7-hydroxycoumarins. A New Synthesis of Benzodipyrandiones and Furobenzopyranones

A novel synthesis of 2H,8H-benzodipyran-2,8-diones, 2H,8H-benzodipyran-2,8-diones, 2H-furobenzopyran-2-ones, and 7H-furobenzopyran-7-ones was achieved by developing 2-pyrone and furan ring over coumarin. 6- or 8-Allyl-7-hydroxycoumarins on oxidation with 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ) afforded benzodipyrandiones and furobenzopyranones.The structures of the compounds now synthesized were established by analytical, spectral, and comparison with authentic samples prepared by the known procedures.