A Cycloaddition Approach toward the Synthesis of Substituted Indolines and Tetrahydroquinolines
作者:Albert Padwa、Michael A. Brodney、Bing Liu、Kyosuke Satake、Tianhua Wu
DOI:10.1021/jo982453g
日期:1999.5.1
acyl azide by a Curtius rearrangement in the presence of an alcohol. Alkylation of the resulting N-alkyl carbamate with an alkenyl bromide allows for the synthesis of a wide variety of cycloaddition precursors. The scope of the IMDAF reaction was evaluated by using mono- and disubstituted alkenes, electron rich and electron deficient olefins, and acetylenic tethers. Cyclic 2-amidofurans were also synthesized
Cycloaddition−Rearrangement Sequence of 2-Amido Substituted Furans as a Method of Synthesizing Hexahydroindolinones
作者:Albert Padwa、Michael A. Brodney、Kyosuke Satake、Christopher S. Straub
DOI:10.1021/jo982061+
日期:1999.6.1
cycloaddition (IMDAF) reaction of 2-amido substituted furans. The initially formed [4 + 2] cycloadduct undergoes nitrogen-assisted ring opening followed by deprotonation of the resulting zwitterion to give the rearranged ketone. The stereochemical outcome of the IMDAF cycloaddition has the sidearm of the tethered alkenyl group oriented syn with respect to the oxygen bridge. The reaction rate and product
Oxidative rearrangement of 2-furylcarbamates with dimethyldioxirane: a high-yielding preparation of 5-hydroxypyrrol-2(5H)-ones
作者:John Boukouvalas、Richard P. Loach、Etienne Ouellet
DOI:10.1016/j.tetlet.2011.07.084
日期:2011.9
A mild, general and efficient method for the oxidative rearrangement of 2-furylcarbamates to N-Boc-5-hydroxypyrrol-2(5H)-ones is reported. The feasibility of removing the Boc group from the products was demonstrated by the synthesis of two hitherto unknown 5-aryl-5-hydroxypyrrol-2(5H)-ones. (C) 2011 Elsevier Ltd. All rights reserved.