Tandem Aldol−Allylation and Aldol−Aldol Reactions with Ketone-Derived Enolsilanes: Highly Diastereoselective Single-Step Synthesis of Complex Tertiary Carbinols
摘要:
A new tandem aldol-allylation reaction employing ketone-derived enolates has been developed that leads to the rapid, diastereoselective synthesis of tertiary carbinol containing fragments with relevance to polyketide natural product synthesis. In addition, the use of ketone-derived enolates has led to the development of a new tandem aldol-aldol reaction.
Asymmetric Total Synthesis of Dibenzocyclooctadiene Lignan Natural Products
作者:Robert S. Coleman、Srinivas Reddy Gurrala、Soumya Mitra、Amresh Raao
DOI:10.1021/jo051525i
日期:2005.10.1
Full details of the asymmetric total syntheses of the dibenzocyclooctadienelignans interiotherin A, angeloylgomisin R, gomisin O, and gomisin E (epigomisin O) are presented. The syntheses were based on a unified synthetic strategy involving a novel crotylation using the Leighton auxiliary that occurred with excellent asymmetric induction (>98:2 enantiomeric ratio), a diastereoselective hydroboration/Suzuki−Miyaura
Allylsilyl Propargyl Ethers as Substrates for Intramolecular Pauson–Khand Reactions
作者:Salma Ishaq、Michael J. Porter
DOI:10.1080/00397910500406120
日期:2006.3.1
Silyl ethers that are synthesized by coupling a propargylic alcohol with an allylsilyl chloride are shown to undergo sulfide-promoted Pauson-Khand reactions, affording bicyclic enones.
Fleming, Ian; Lee, Duckhee, Journal of the Chemical Society. Perkin transactions I, 1998, # 17, p. 2701 - 2709
作者:Fleming, Ian、Lee, Duckhee
DOI:——
日期:——
Vaisarova,V. et al., Collection of Czechoslovak Chemical Communications, 1978, vol. 43, p. 265 - 277
作者:Vaisarova,V. et al.
DOI:——
日期:——
Stereospecific, Enantioselective Allylation of ?-Hydrazono Esters by Using Allyltrichlorosilanes with BINAP Dioxides as Neutral-Coordinate Organocatalysts