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
PREPARATION AND DIELS-ALDER REACTION OF A 2-AMIDO SUBSTITUTED FURAN: tert-BUTYL 3a-METHYL-5-OXO-2,3,3a,4,5,6-HEXAHYDROINDOLE-1-CARBOXYLATE
作者:Padwa, Albert、Brodney, Michael A.、Lynch, Stephen M.、Dandapani, Sivaraman、Curran, Dennis P.
DOI:10.15227/orgsyn.078.0202
日期:——
A New Method for the Formation of Octahydroindole Alkaloids via the Intramolecular Diels−Alder Reaction of 2-Amidofurans
作者:Albert Padwa、Michael A. Brodney、Martin Dimitroff
DOI:10.1021/jo980815e
日期:1998.8.1
Stereoselective reductions of N-Boc-hexahydro-1H-indolin-5(6H)-ones
作者:Michael A. Brodney、Marcus L. Cole、Jamie A. Freemont、Stella Kyi、Peter C. Junk、Albert Padwa、Andrew G. Riches、John H. Ryan
DOI:10.1016/j.tetlet.2007.01.078
日期:2007.3
stereoselectivity of reduction of the enamide moiety of N-Boc-hexahydro-1H-indolin-5(6H)-ones. Under ionic reduction conditions (triethylsilane/trifluoroaceticacid) the enamide group of 3a-methyl-N-Boc-hexahydro-1H-indolin-5(6H)-one was reduced to afford exclusively a cis ring-fused product. For the 3a-phenyl substituted analogue more forcing conditions (sodiumcyanoborohydride at pH 2–2.5) were required
Formal Total Synthesis of (±)-γ-Lycorane and (±)-1-Deoxylycorine Using the [4+2]-Cycloaddition/Rearrangement Cascade of Furanyl Carbamates
作者:Albert Padwa、Michael A. Brodney、Stephen M. Lynch
DOI:10.1021/jo0014109
日期:2001.3.1
gamma-lycorane and (+/-)-1-deoxylycorine were accomplished using an intramolecular Diels-Alder cycloaddition of a furanyl carbamate as the key step. The initially formed [4+2]-cycloadduct undergoes nitrogen-assisted ring opening followed by deprotonation/reprotonation of the resulting zwitterion to give a rearranged hexahydroindolinone. The stereochemical outcome of the IMDAF cycloaddition has the side arm