243970-08-3

Upstream product

• 3898-41-7 1,4-dipropoxybenzene 
• 68-12-2 N,N-dimethyl-formamide 
• 243970-07-2 1,4-dibromo-2,5-bispropyloxybenzene 

Downstream Products

• 1026009-09-5 4-{(E)-2-[4-((E)-2-{2,5-Dipropoxy-4-[(E)-2-(4-[2,2';6',2'']terpyridin-4'-yl-phenyl)-vinyl]-phenyl}-vinyl)-phenyl]-vinyl}-2,5-dipropoxy-benzaldehyde 
• 1026608-49-0 4-[2-(5-{2-[4-(2-{5-[2-(4-methoxyphenyl)vinyl]thiophen-2-yl}vinyl)-2,5-dipropoxyphenyl]vinyl}thiophen-2-yl)vinyl]-2,5-dipropoxybenzaldehyde 

Relevant academic research and scientific papers

Oligomers of uniformly arranged chalcone building blocks

A convergent and coupled synthesis was developed for the cross-conjugated oligomers 1a-d which contain one to four chalcone building blocks arranged in the same direction. The preparation started with 1,4-dipropoxybenzene (2) and led via bromination (2 → 3, 6) and Bouveault reactions to the carbonyl components 4, 5 and 7. Protection of the formyl group (7 → 8) and a further Bouveault reaction yielded the bifunctional compound 9 which played a central role for the extension of the chain. The substituted benzaldehyde 4 was transformed by this means to the aldehydes 10, 11 and 12. The compounds 4 and 10-12 reacted in the final step with the acetophenone 5 to the desired oligomers 1a - d. WILEY-VCH Verlag GmbH, 1999.