445423-75-6

Upstream product

• 445423-69-8 4-(4-o-tolyloxy-but-2-ynylsulfanyl)-chromen-2-one 
• 22406-33-3 4-sulfanyl-2H-chromen-2-one 
• 84814-02-8 4-chloro-1-(2-methylphenyloxy)but-2-yne 

Relevant academic research and scientific papers

Studies on sulfoxide rearrangements: Regioselective synthesis of 3-(aryloxyacetyl)-2,3-dihydrothieno[3,2-c][1]benzopyran-4-ones

Hitherto unreported 3-(aryloxyacetyl)-2,3-dihydrothieno[3,2-c][1] benzopyran-4-ones 5a-f were synthesised in 70-75% yields by the application of the sulfoxide rearrangement of 4-(4-aryloxybut-2-ynylthio)[1]benzopyran-2-ones 4a-f. The substrates 4a-f were