143885-65-8

Upstream product

• 883-75-0 3,4-Dihydro-5-hydroxy-7-methoxy-2,2-dimethyl-2H-1-benzopyran 
• 943-89-5 (E)-3-(4-methoxyphenyl)acrylic acid 
• 32550-59-7 6-Acetyl-5-hydroxy-7-methoxy-3,4-dihydro-2,2-dimethyl-2H<1>benzopyran 
• 123-11-5 4-methoxy-benzaldehyde 
• 125142-15-6 Acetic acid 7-methoxy-2,2-dimethyl-chroman-5-yl ester 

Downstream Products

• 97185-33-6 3-(4'-methoxy)phenyl-5-methoxy-8,8-dimethyl-9,10-dihydro-4H,8H-benzo<1,2b:5,6b'>dipyran-4-one 

Relevant academic research and scientific papers

A facile synthesis of acetyl-hydroxy-2, 2-dimethylchromans and 2,2- dimethyl-2H-3,4-dihydropyranoflavanones - Dihydro mixtecacin, atalantoflavone dimethyl ether and racemoflavone dimethyl ether

Synthesis of acetyl-hydroxy-2, 2-dimethyl chromans by thermal-Fries rearrangement of acetoxy-2, 2-dimethylchromans has been described. The reaction of acetyl-hydroxy chromans (2, 4 and 6) with aryl aldehyde in the presence of aqueous ethanolic potassium h

CINNAMOYLATION OF CHROMANS: FORMATION OF FLAVONOIDS AND NEOFLAVONOIDS

Cinnamoylation of chroman 1 with 4 in presence of fused zinc chloride and phosphorus oxychloride gave chalcone 8 and with acids 5-7, the chalcones 9-11 and dihydrocoumarins 15-17 respectively.A similar reaction of chroman 2 with acids 4 and 5 afforded the