Samarium(II) iodide-induced tandem reductive coupling-Dieckmann condensation reaction: one-step synthesis of bicyclic oxacyclopentanecarboxylate from bis-α,β-unsaturated esters
The tandem cyclization of bis-α,β-unsaturated esters with SmI2-Sm–THF in the presence of catalytic amount of methanol was found to stereoselectively provide bicyclo[4.3.0]nonan-8-ones and bicyclo[3.3.0]octan-3-ones.
A total synthesis of (±)-1-desoxyhypnophilin: using ring closing metathesis for the construction of cyclic enones
作者:David C Harrowven、Matthew C Lucas、Peter D Howes
DOI:10.1016/s0040-4039(00)01595-1
日期:2000.11
strategic feature is a new cyclopentannulation method for appending cycloalkenones onto ketones involving sequential use of a ring closing metathesis reaction with a tertiary allylic alcohol and a PCC inducedoxidativerearrangement.
The first total synthesis of (±)-1-desoxyhypnophilin
作者:David C Harrowven、Matthew C Lucas、Peter D Howes
DOI:10.1016/s0040-4020(01)00899-7
日期:2001.10
African mushroom Lentinus crinitus which displays promising antimicrobial activity. A key feature is the use of a ring closing metathesis reaction with a tertiary allylic alcohol, in conjunction with a PCC inducedoxidativerearrangement, to construct a cyclopentenone.
Synthesis of hirsutene — An approach involving asymmetric epoxide fragmentation
作者:John Leonard、Lisa Bennett、Arshed Mahmood
DOI:10.1016/s0040-4039(99)00622-x
日期:1999.5
A formal synthesis of hirsutene from bicyclo[3.3.0]octanone has been completed. The key step was a lithium amide mediated spiro-epoxide fragmentation reaction. The use of chiral lithium amide bases to induce asymmetry in the epoxide opening step was investigated.