Base-Promoted Heterocyclization of Fluorinated Alkynylphosphonates with Select ortho-Aminobenzonitriles
作者:Blazej Duda、Sergey N. Tverdomed、Boris I. Ionin、Gerd-Volker Röschenthaler
DOI:10.1002/ejoc.201200379
日期:2012.7
The heterocyclization reactions of CF2-containing alkynylphosphonates with 2-aminobenzonitriles to give 2,3-difunctionalized 4-aminoquinolines were investigated. The influence of the R1 and R2 substituents and CF2X groups on the synthetic efficiency and specificity is also disclosed.
CF2-Containing acetylenephosphonates in heterocyclization reactions: the first synthesis of 2-difluoromethyl azaxanth-3-ylphosphonates
作者:Blazej Duda、Sergey N. Tverdomed、Gerd-Volker Röschenthaler
DOI:10.1039/c1ob06379k
日期:——
Acetylenephosphonates carrying the XCF2 group have been studied in a base-mediated heterocyclization reaction with selected 2-amino-3-formylchromones to give 2-difluoromethyl azaxanth-3-ylphosphonates. The presence of the fluorinated substituent determined the regioselectivity as well as the reactivity of this process.
Fluorinated Alkynylphosphonates in<i>C</i>,<i>C</i>-Cyclizations: Regioselective Formation of Polysubstituted Fluorinated Arylphosphonates
作者:Blazej Duda、Sergey N. Tverdomed、Boris I. Ionin、Gerd-Volker Röschenthaler
DOI:10.1002/ejoc.201402188
日期:2014.6
The regioselective C,C-cyclization of selected 1,4-bipolar substrates with fluorinatedalkynylphosphonates provided polysubstituted benzenes and naphthalenes in up to 98 % yield. For the case in which tetraethyl ethynylbisphosphonate was used, an unexpected phosphonate–phosphoramidate rearrangement was, for the first time, observed, which occurred in excellent yield.