Chemoselectivity in the Cu-catalyzed O-arylation of phenols and aliphatic alcohols
作者:Debabrata Maiti
DOI:10.1039/c1cc12694f
日期:——
An orthogonal set of Cu-catalysts for the selective mono-arylation of alkyl aryl diols using aryl iodides is presented. Picolinic acid ligated copper catalyst provided phenol O-arylation only, while alkyl aryl ethers are generated by ligand-free copper catalyst in the presence of 2 equivalents NaOt-Bu.
An efficient method for the synthesis of heteroaryl C–O bonds in the absence of added transition metal catalysts
作者:Katie Walsh、Helen F. Sneddon、Christopher J. Moody
DOI:10.1039/c4ra04851b
日期:——
Reaction of 2-chloropyrazine and 2-chloropyrimidine with phenols and alcohols in the presence of K2CO3 in DMSO results in high yielding SNAr coupling. The reaction works particularly well with phenols and yields are comparable or superior to the metal-catalysed couplings described in the literature.
2-氯吡嗪和2-氯嘧啶与K的存在下酚和醇的反应2 CO 3在DMSO导致高产小号Ñ氩耦合。该反应特别适用于苯酚,其收率可与文献中描述的金属催化偶合相媲美或更高。