Intermediates in the reaction of N,N-dimethylanilines with palladium (II) acetate were trapped by acetate ion or oxygen to give N-methyloxygenated and demethylated products, while the trapping by other anilines gave homo- and cross-coupling cyclodimers. The reactions proceed via radical cation formation induced by the palladium salt.
SAKAKIBARA, TSUTOMU;HAMAKAWA, TOMOKO, CHEM. LETT., 1982, N 11, 1823-1824
作者:SAKAKIBARA, TSUTOMU、HAMAKAWA, TOMOKO
DOI:——
日期:——
Vilsmeier formylation of tert-anilines: dibenzo[b,f ][1,5]diazocines and quinazolinium salts via the ‘t-amino effect’1
作者:Ying Cheng、Otto Meth-Cohn、David Taylor
DOI:10.1039/a708799c
日期:——
e is used as the Vilsmeier reagent, normal formylation is observed, while use of aliphatic Vilsmeier reagents such as DMF and N-formylmorpholine give quinazolinium salts 16 and 17, also by way of the ‘t-aminoeffect’. The key feature in these formylations is the hydride transfer from the α-position of a tertiary amine to an unsaturated ortho-substituent CHNR2+, the ‘t-aminoeffect’.