Asymmetric Total Synthesis of (+)-Bermudenynol, a C<sub>15</sub><i>Laurencia</i>Metabolite with a Vinyl Chloride Containing Oxocene Skeleton, through Intramolecular Amide Enolate Alkylation
作者:Gyudong Kim、Te-ik Sohn、Deukjoon Kim、Robert S. Paton
DOI:10.1002/anie.201308077
日期:2014.1.3
A substrate‐controlled asymmetric total synthesis of (+)‐bermudenynol, a compact and synthetically challenging C15 Laurencia metabolite that contains several halogen atoms, is reported. The oxocene core, which contains a vinyl chloride, was constructed by an efficient and highly stereoselective intramolecular amide enolate alkylation (IAEA). This result showcases the broad utility of the IAEA methodology
Total Synthesis of (+)-Cryptocaryalactone and of a Diastereoisomer of (+)-Strictifolione<i>via</i>Ring-Closing Metathesis (RCM) and Olefin Cross-Metathesis (CM)
作者:Gowravaram Sabitha、Bhaskar Vangala、S. Siva Sankara Reddy、Jhillu S. Yadav
DOI:10.1002/hlca.200900170
日期:2010.2
Ring‐closing metathesis (RCM) and olefin cross‐metathesis (CM) reactions were used as the key steps for the synthesis of (+)‐cryptocaryalactone (1) and the first synthesis of the diastereoisomer 3 of (+)‐strictifolione, starting from the commercially available L‐malic acid (=(2S)‐2‐hydroxybutanedioic acid).
Asymmetric Epoxide Cyclisation Route to the F-pyran Fragment of the Altohyrtins and Key Aldol Studies
作者:James C. Anderson、Benjamin P. McDermott、Edward J. Griffin
DOI:10.1016/s0040-4020(00)00804-8
日期:2000.10
differentially protected F-pyran ring of the altohyrtins is described, which relies on a key intramolecular cyclisation of a C43 hydroxyl group onto a C38–C39 epoxide. The C38–C39 epoxide stereochemistry was achieved through optimisation of substrate control. Key aldol studies towards coupling the F-pyran ring with an E-pyran ring precursor was investigated, but unsuccessful.