Palladium catalyzed coupling reactions of diiodoarenes with allylic and homoallylic alcohols
摘要:
A sequential transformation consisting of a twofold Heck reaction of 1,2-diiodobenzene (14) with allyl alcohol (2) followed by an intramolecular aldol condensation is suitable for the construction of the benzocyclohept-2-ene-2-carboxaldehyde (15). Under the same reaction conditions 1,8-diiodonayhthalene (7) lends to 1-acenaphthenyl-methanol (6), 2-(1-acenaphthenyl)-ethanol (8), 1-(1w-acenaphthenyl)-ethanol (11), 5-(1,8-naphthalena)-nonan-2,8-dione (12) and 5-(1-naphthyl)-3-methylpentan-2-on (13) mainly.
Heck arylation of allyl alcohol catalyzed by Pd(0) nanoparticles
作者:Stanisława Tarnowicz、Waleed Alsalahi、Ewa Mieczyńska、Anna M. Trzeciak
DOI:10.1016/j.tet.2017.03.034
日期:2017.9
Pd(OAc)2 in water at 80 °C in the presence of a PVP-stabilizing polymer. Pd(0) NPs were successfully used in the Heckcoupling of allyl alcohol with iodo- and bromobenzenes. Iodobenzenes reacted under solventless conditions or in DMF solution producing 3-arylpropanals and 2-arylpropanals as the main products. The same products were obtained in the reaction of bromobenzene in TBAB as the reaction medium