Construction of the 6-Azabicyclo[3.2.1]octane Ring System via Higher-Order Cycloaddition; Formal Total Synthesis of (±)-Peduncularine
作者:James H. Rigby、J. Hoyt Meyer
DOI:10.1055/s-1999-3083
日期:——
The azabicyclo[3.2.1]octane core of the Aristotelia alkaloid, peduncularine has been prepared employing a chromium(0)-promoted [6Ï + 2Ï] isocyanate/triene cycloaddition reaction as the key ring-forming step.
Formal Synthesis of (±)-Peduncularine: Use of the [3 + 2] Annulation of Allylic Silanes and Chlorosulfonyl Isocyanate
作者:Claudia W. Roberson、K. A. Woerpel
DOI:10.1021/ol9913744
日期:2000.3.1
[reaction: see text] The formal synthesis of the alkaloid (+/-)-peduncularine (1) was accomplished through the use of a [3 + 2] allylic silane annulation. The annulation of cyclohexadienyl silane 6 with chlorosulfonylisocyanate followed by an in situ reduction provided bicyclic lactam 7. Conversion of this intermediate to 2 in three steps completed the formal synthesis of (+/-)-peduncularine.