Use of Conjugated Dienones in Cyclialkylations: Total Syntheses of Arucadiol, 1,2-Didehydromiltirone, (±)-Hinokione, (±)-Nimbidiol, Sageone, and Miltirone
摘要:
Functionalized hydrophenanthrenes can be prepared using a cyclialkylation-based strategy. These annulations are highly dependent on the directing effects of the arene substitutents and on conformational considerations. The utility of this methodology was featured in the syntheses of six diterpenoids.
A new method for the construction of quarternary carbon centers is reported, which is based on the Lewisacid-promoted 1,2-rearrangement of β,γ-epoxy alcohols giving α,α-disubstituted aldols stereospecifically in high yields.
Synthese de β-cetols par scission de trimethylsiloxy-1'alkyl-2oxirannes par TiCl 4 dans le dichloromethane
合成这些 de β-cetols par scission de trimethylsiloxy-1'alkyl-2oxirannes par TiCl 4 dans le 二氯甲烷
Base-catalysed rearrangement of β-hydroxyvinylsilanes to allyl silyl ethers
作者:Fumie Sato、Youichi Tanaka、Masao Sato
DOI:10.1039/c39830000165
日期:——
A 1,3-silyl group shift from carbon to oxygen occurs readily when β-hydroxyvinylsilanes are treated with catalytic amounts of sodium hydride in hexamethylphosphoric triamide, thus providing the first demonstration of the rearrangement of silicon from sp2-carbon to oxygen.
Organolithium addition to aldehyde dimethylhydrazones: a highly diastereocontrolled synthesis of threo 2-amino alcohols, and (1R,2R)-(-)-norpseudoephedrine
作者:David A. Claremon、Patricia K. Lumma、Brian T. Phillips
DOI:10.1021/ja00286a027
日期:1986.12
L'addition conduit a des β-aminoalcools satures. Synthese de la norpseudoephedrine a partir de phenyl-1 propene-2ol-1
L'加成导管a des β-aminoalcools saturs。Synthese de la norpseudoephedrine a partir de phenyl-1 propene-2ol-1
Bartoli, Giuseppe; Bosco, Marcella; Dalpozzo, Renato, Journal of the Chemical Society. Perkin transactions I, 1991, p. 2757 - 2762