216306-43-3

Upstream product

• 3898-41-7 1,4-dipropoxybenzene 
• 123-31-9 hydroquinone 
• 18979-50-5 4-propoxyphenol 
• 216306-42-2 Acetic acid (3-bromo-4-propyloxyphenyl)ester 
• 69788-81-4 4-n-propoxyphenyl acetate 
• 107-08-4 1-iodo-propane 
• 191983-34-3 3-bromo-4-propoxyphenol 

Downstream Products

• 216306-45-5 1-bromo-4-iodo-2,5-dipropoxybenzene 
• 142499-42-1 2',5'-Dipropoxyacetophenon 
• 4686-99-1 2,5-bispropyloxybenzaldehyde 
• 406721-36-6 2,5-dipropoxy-1-trimethylsilylethynylbenzene 
• 221292-51-9 1,4-dipropyloxy-2-ethynyl-5-(2-triisopropylsilylethinyl)benzene 
• 221292-50-8 1,4-dipropyloxy-2-(2-triisopropylsilylethynyl)-5-(2-trimethylsilylethinyl)benzene 
• 773060-38-1 1-Ethynyl-4-phenylethynyl-2,5-dipropoxy-benzene 
• 773060-40-5 4-(4-ethynyl-2,5-dipropoxy-phenylethynyl)-benzonitrile 
• 406721-42-4 2-ethynyl-1,4-dipropyloxybenzene 
• 406721-40-2 1-bromo-2,5-dipropoxy-4-trimethylsilylethynylbenzene 
• 406721-41-3 1-bromo-2,5-dipropoxy-4-triisopropylsilylethynylbenzene 
• 406721-49-1 1-(2,5-dipropoxyphenylethynyl)-4-[4-ethynyl-2,5-dopropoxyphenylethynyl]-2,5-dipropoxybenzene 
• 406721-50-4 1,4-bis(4-bromo-2,5-dipropoxyphenylethynyl)-2,5-dipropoxybenzene 
• 406721-48-0 4-(2,5-dipropoxyphenylethynyl)-1-[2,5-dipropoxy-4-(triisopropylsilylethynyl)phenylethynyl]2,5-dipropoxybenzene 

Relevant academic research and scientific papers

Preparation and nonlinear optics of monodisperse oligo(1,4-phenyleneethynylene)s

Oligo(1,4-phenyleneethynylene)s 1a-e, with solubilizing propoxy side chains, were prepared by use of Hagihara-Sonogashira coupling reactions. The synthetic strategy was based on a building block system and on the use of trimethylsilyl and triisopropylsily

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.

2-Bromo-5-iodo-hydroquinone and its symmetrical and unsymmetrical dialkylethers

2-Bromo-5-iodo-hydroquinone dialkylethers are prepared by the stepwise halogenation and alkylation of hydroquinone monoalkylethers using simple and easily performable reactions. Boron tribromide induced cleavage of the dipropoyl ether gives the parent com