The total synthesis of (+/-)-isophellibiline is described. This represents the first synthesis of a member of the nonaromatic homoerythrinan family of alkaloids. The tetracyclic ring system of the natural product was quickly assembled by a strategy that features a retrocycloaddition/cycloaddition reaction of amidodioxin, an intramolecular Heck reaction and a 6 pi-electrocyclic ring closure of a dienoic acid. (C) 2011 Elsevier Ltd. All rights reserved.
Enantioselective Halocyclization Using Reagents Tailored for Chiral Anion Phase-Transfer Catalysis
作者:Yi-Ming Wang、Jeffrey Wu、Christina Hoong、Vivek Rauniyar、F. Dean Toste
DOI:10.1021/ja305795x
日期:2012.8.8
A chiral anion phase-transfer system for enantioselective halogenation is described. Highly insoluble, ionic reagents were developed as electrophilic bromine and iodine sources, and application of this system to o-anilidostyrenes afforded halogenated 4H-3,1-benzoxazines with excellent yield and enantioselectivity.
Free Radical-Mediated Vinyl Amination: Access to <i>N,N</i>-Dialkyl Enamines and Their β-Stannyl and β-Thio Derivatives
作者:Erode N. Prabhakaran、Benjamin M. Nugent、Amie L. Williams、Kristen E. Nailor、Jeffrey N. Johnston
DOI:10.1021/ol027064u
日期:2002.11.1
The first examples of free radical-mediated vinyl amination are described by nonconventional vinyl radical addition to azomethine nitrogen. This new vinyl amination protocol is mild and provides convenient synthetic access to nonstabilized N,N-dialkyl enamines and tandem bond-forming processes.