Oxidative dimerization: Pd(II) catalysis in the presence of oxygen using aqueous media

Preparation of poly(fluorene)s using trans‐bis(dicyclohexylamine)palladium diacetate as a catalyst: Scope and limitations

“…Alternatively, oxidative homocoupling of 2 might be a favorable process accounting for the absence of boronic end groups. [54][55][56] To gain information on the facility for homocoupling under the conditions employed in this study, we re- acted 2 without adding 1 under otherwise the same conditions used to obtain PF6-4. Neither coupling nor deboronation of 2 was observed, so homocoupling of 2 can be ruled out.…”

Pd(II)‐catalyzed base‐free oxidative homocoupling of fluorene diboronic acid ester: A new approach for the synthesis of π‐conjugated polymers

“…It is noted that Pd‐catalyzed oxidative homocoupling of arylboronic acid or esters has been used for the construction of Ar–Ar compounds in organic chemistry 36–43. Such process is carried out under O 2 using Pd(II) as a catalyst in the presence (or absence) of a base 36, 37, 39, 42. However, to the best of our knowledge, there are no any reports concerning to polymerization using these procedures previously.…”

Synthesis of PEG-supported organotrifluoroborates and their applications in palladium-catalyzed homo-coupling reactions

“…The reaction mixture was stirred for 2 hours at room temperature and then the solvent was partially removed under reduced pressure. The 1 H NMR and 13 C NMR spectra of known compounds 6a, 15 6b, 16 6c, 16 6d, 15 6e, 18 6f, 13 6g 23 , 6h, 16 6i 24 , 6j, 6k, 7 6l 25 , 6m 18 The organic layer was dried using anhydrous MgSO 4 and then the solvent removed under vacuum to give 1.4 g of product (91% yield).…”