In order to investigate their potential applications as additives, we synthesized the allyl-terminated hyperbranched PAEKs (HBP-AL) via an etherification between HBP-OH and allyl bromide and incorporated HBP-AL into the bismaleimide (BMI) resins based on 4,4'-bismaleimideodiphenylmethane (BMDM, Chart 1) and 2,2'-diallylbisphenal A (DBA).
The reaction was cooled to about 80[degrees]C, followed by adding allyl bromide (12 mL, 0.14 mol, 3 equiv.
Various aldehydes were cleanly allylated with indium and allyl bromide
in liquid carbon dioxide.
Using alkynylmagnesium bromides and allyl bromide
, we investigated modifications of the known Cu(I) catalyzed coupling reaction (Davini et al., 1995) to prepare 1-hexen-4-yne and 1-pentene-4-yne.
Table 2 shows that the reactivity of brominated compounds is larger than that of chlorinated compounds and allyl bromide
reacts quantitatively with sodium-metallated PMIA at 20 [degrees] C.