Total synthesis of (±)-β-bulnesene, (±)-cryptofauronol, (±)-fauronyl acetate, and (±)-valeranone
作者:Peter G. Sammes、Leslie J. Street
DOI:10.1039/c39830000666
日期:——
A versatile method for the preparation of perhydroazulenes and cis-fused 1-decalones is described and exemplified by the synthesis of the title compounds.
Facile approach to the bicyclo[5.3.0]decane ring system; efficient synthesis of (±)-7-epi-β-bulnesene
作者:Jalluri S Ravi Kumar、Michael F O'Sullivan、Sarah E Reisman、Catherine A Hulford、Timo V Ovaska
DOI:10.1016/s0040-4039(02)00171-5
日期:2002.3
An efficient strategy for the rapid construction of the guiane bicyclo[5.3.0]decane ring system from appropriately substituted 4-alkyn-1-ols has been developed. This methodology relies on a MeLi-catalyzed tandem 5-exo-dig cyclization/Claisen rearrangement sequence as the key ring forming step.
Total Synthesis of ?-Bulnesene and 1-Epi-?-bulnesene by Intramolecular Photoaddition
作者:Wolfgang Oppolzer、Robert D. Wylie
DOI:10.1002/hlca.19800630511
日期:1980.7.9
dl-β-Bulnesene (1) and dl-1-epi-α-bulnesene (15) have been synthesized starting from the bromide 4 (Schemes 2 and 3). In the key step 910 the bonds of the final product were formed by an intramolecularphotoaddition. The synthesis was completed by the fragmentation 1214 and the Wittig reaction 1415+1.
Synthesis of Hydrazulenes via Zr-Promoted Bicyclization of Enynes and Transition Metal-Catalyzed or Radical Cyclization of Alkenyl Iodides. Efficient Synthesis of (±)-7-<i>epi</i>-β-Bulnesene
Total synthesis of (±)-β-bulnesene via intramolecular cycloaddition of a 2-substituted 3-oxidopyrylium
作者:Steven M. Bromidge、Peter G. Sammes、Leslie J. Street
DOI:10.1039/p19850001725
日期:——
precursor of a 2-substituted 3-oxidopyrylium, which undergoes smooth intramolecular cyclisation to generate a highly functionalised perhydroazulene intermediate. Further chemical manipulation of the latter readily generates the desired natural product. In order to control the relative geometry of the pendent 4-methyl group in the target molecule, a method involving the stereoselective reduction of an exocyclic