Total Synthesis of the Marine Sponge Alkaloid Motuporamine C Using a Ramberg‐Bäcklund Ring Contraction Strategy

Total Synthesis of the Marine Sponge Alkaloid Motuporamine C Using a Ramberg‐Bäcklund Ring Contraction Strategy Total Synthesis of Marine Alkaloids Motuporamines A and B via Ring Expansion of Cyclic β-Keto Esters Synthesis of Dihydromotuporamine C via 3‐Azonia‐Cope Rearrangement of 11‐Membered Cyclic α‐Vinylamine Motuporamines, Anti-Invasion and Anti-Angiogenic Alkaloids from the Marine Sponge Xestospongia exigua (Kirkpatrick):  Isolation, Structure Elucidation, Analogue Synthesis, and Conformational Analysis Motuporamines, Anti-Invasion and Anti-Angiogenic Alkaloids from the Marine Sponge <i>Xestospongia </i><i>e</i><i>xigua </i>(Kirkpatrick):  Isolation, Structure Elucidation, Analogue Synthesis, and Conformational Analysis Concise total synthesis of (±)-Dibromoagelaspongin Total Synthesis of the Marine Alkaloid Mansouramycin D Motuporamines A−C, Cytotoxic Alkaloids Isolated from the Marine Sponge <i>Xestospongia exigua</i> (Kirkpatrick) Total synthesis of (±)-N-methyldibromoisophakellin and N-methylugibohlin via net [3 + 2] cycloguanidinylations employing 2-amido-1,3-diamino-allyl cations Total syntheses of makaluvamines A, B, C, D and E, cytotoxic pyrroloiminoquinone alkaloids isolated from marine sponge bearing inhibitory activities against topoisomerase II