74794-35-7

Upstream product

• 33427-62-2 2,4-dihydroxy-3-iodobenzophenone 
• 78-79-5 isoprene 
• 91735-50-1 6-benzoyl-3,4-dihydroxy-7-hydroxy-8-iodo-2,2-dimethyl-2H-1-benzopyran 
• 91735-46-5 6-benzoyl-3,4-dihydro-7-hydroxy-2,2-dimethyl-2H-1-benzopyran 
• 74794-33-5 7-hydroxy-8-iodo-4-phenyl-2H-1-benzopyran-2-one 
• 2555-30-8 7-hydroxy-4-phenylcoumarin 
• 74794-34-6 7-(1,1-dimethyl-2-propynyloxy)-8-iodo-4-phenylcoumarin 
• 81016-75-3 3,4-dihydro-2,2-dimethyl-6-phenyl-2H,8H-benzo<1,2-b:5,4-b'>dipyran-8-one 

Relevant academic research and scientific papers

An Improved Synthesis of Benzoyl-chromans and Chromenes

Direct nuclear isoprenylation of polyhydroxybenzophenones with 2-methylbut-1,3-diene (isoprene) in the presence of orthophosphoric acid results exclusively in the formation of benzoylchromans in good yields.These benzoylchromans on dehydrogenation with DD

Synthesis of Linear Pyranocoumarins: Xanthoxyletin, 4-Methylxanthyletin, and 4-Phenylxanthyletin

A convenient synthesis of linear pyranocoumarins (2H,8H-benzodipyran-2-ones), viz., xanthoxyletin, 4-methylxanthyletin and 4-phenylxanthyletin is described which uses blocking the 8-position of appropriate 7-hydroxycoumarin derivatives with iodine and 1,1-dimethyl-2-propynylation followed by cyclisation.