The stereoselective total synthesis of the marine alkaloid (-)-amathaspiramide F (1) was achieved from the alpha-hydoxy-alpha-ethynylsilane 2. The crucial steps in this synthesis involved not only the enolate Claisen rearrangement of the alpha-acyloxy-alpha-alkenylsilane 6 for the construction of the nitrogen-containingquaternarycarboncenter, but also the chemoselective formation of the azaspirohemiaminal
The stereoselective total synthesis of the marine alkaloid, (−)-amathaspiramide F (1), was achieved from the α-hydroxy-α-ethynylsilane 2. The key steps involved in the synthesis were (1) the enolate Claisenrearrangement of the α-acyloxy-α-alkenylsilane for the stereoselectiveconstruction of the consecutive C5 and C9 chiral centers of 1 (erythro configuration), (2) the construction of aza-spirohemiaminal