92544-40-6Relevant academic research and scientific papers
Simultaneous construction of polymer backbone and side chains by three-component polycondensation. Synthesis of polyethers with allenyl side chains from dialdehydes, alkylene bis(trimethylsilyl) ethers, and propargyltrimethylsilane
Niimi, Lui,Shiino, Keitaro,Hiraoka, Shuichi,Yokozawa, Tsutomu
, p. 3490 - 3494 (2002)
Polyethers with the allenyl side chains were synthesized by the simultaneous acid-catalyzed reaction of dialdehydes 1, alkylene bis(trimethylsilyl) ethers 2, and 1-trimethylsilyl-2-butyne (4b). Before polymerization, Lewis acid-catalyzed three-component reactions of aldehydes, alkoxysilanes, and propargylsilanes were studied to find that 4b was effective as an allenyl reagent in this reaction. The polycondensations of 1, 2, and 4b were carried out in the presence of 10 mol% of triphenylmethyl perchlorate (TrClO4) at -50 °C to yield the desired polyethers consisting of 1, 2, and 4b with a molar ratio of 1:1:2 in good yields. This polyether was treated with a cationic catalyst such as BF3OEt2 to give a cross-linked polymer. This polymer synthesis is unusual in that it concurrently constructs both the polymer backbone and the functional side chains from three starting compounds.
Lewis acid-catalyzed three-component condensation reactions of aldehydes, alkoxysilanes, and propargylsilane: Synthesis of α-allenyl ethers
Niimi, Lui,Shiino, Keitaro,Hiraoka, Shuichi,Yokozawa, Tsutomu
, p. 1721 - 1724 (2007/10/03)
For simultaneous construction of a polyether backbone and the allenyl side chains, Lewis acid-catalyzed three-component condensation reactions of aldehydes, alkoxytrimethylsilanes, and 1-trimethylsilyl-2-butyne were studied. The reaction of these three compounds took place in the presence of a catalytic amount of TrClO4 at -78°C to yield the corresponding α-allenyl ethers in good yields. This reaction was also applied to the synthesis of a polyether having allenyl side chains.
