Synthetic routes to cristatic acid and derivatives
作者:Jack Chiarello、Madeleine M. Joullié
DOI:10.1016/s0040-4020(01)85090-0
日期:1988.1
Synthetic paths to cristatic acid derivatives are explored and a convergent route to the total synthesis of these molecules is described.
探索了到环戊酸衍生物的合成途径,并描述了这些分子全部合成的收敛途径。
Regioselective Hydration of Alkynes by Iron(III) Lewis/Brønsted Catalysis
作者:Jose R. Cabrero-Antonino、Antonio Leyva-Pérez、Avelino Corma
DOI:10.1002/chem.201200580
日期:2012.8.27
The triflimide iron(III) salt [Fe(NTf2)3] promotes the direct hydration of terminal and internal alkynes with very good Markovnikov regioselectivities and high yields. The enhanced carbophilic Lewis acidity of the FeIII cation mediated by the weakly‐coordinating triflimide anion is crucial for the catalytic activity. The iron(III) metal salt can be recycled in the form of the OPPh3/[Fe(NTf2)3] system
C–H functionalisation of aldehydes using light generated, non-stabilised diazo compounds in flow
作者:Paul Dingwall、Andreas Greb、Lorène N. S. Crespin、Ricardo Labes、Biagia Musio、Jian-Siang Poh、Patrick Pasau、David C. Blakemore、Steven V. Ley
DOI:10.1039/c8cc06202a
日期:——
Here we explore further the use of oxadiazolines, non-stabilised diazo precursors which are bench stable, in direct, non-catalytic, aldehyde C–H functionalisation reactions under UV photolysis in flow and free from additives.
Trialkylborane as an Initiator and Terminator of Free Radical Reactions. Facile Routes to Boron Enolates via α-Carbonyl Radicals and Aldol Reaction of Boron Enolates
作者:Kyoko Nozaki、Koichiro Oshima、Kiitiro Utimoto
DOI:10.1246/bcsj.64.403
日期:1991.2
variety of trialkylborane-induced reactions were examined for the preparation of the α-carbonyl radicals: (1) addition of alkyl radical to methyl vinyl ketone, (2) reduction of α-halo ketone, and (3) intramolecular radical addition to α,β-unsaturated carbonyl moiety. Trialkylborane reacted with α-carbonyl radicals to give boron enolates. The resulting boron enolates were efficiently trapped by carbonyl
Studies on monoterpene glucosides and related natural products. XLV. Synthesis of 13C-labeled acyclic monoterpenes for studies on the mechanism of the iridane skeleton formation in the biosynthesis of iridoid glucosides.
作者:SHINICHI UESATO、KOJI KOBAYASHI、HIROYUKI INOUYE
DOI:10.1248/cpb.30.927
日期:——
For studies on the cyclopentane ring formation from acyclic monoterpenes in the biosynthesis of iridoid glucosides, the following 13C-labeled precursors of the acyclic monoterpene series were synthesized : [9-13C]-and [4-13C]-10-hydroxygeraniol (9), [2-13C]-9, 10-dihydroxygeraniol (10), (R)-(+)-and (S)-(-)-[9-13C]-10-hydroxycitronellol ((R)-(+)-and (S)-(-)-8), (R)-(+)-and (S)-(-)-[8-13C]-9, 10-dihydroxycitronellol ((R)-(+)-and (S)-(-)-11).