New Trimethylenemethane Dianion Synthons: Application to the Preparation of Substituted Perhydrofuro[2,3-b]furans
作者:Emilio Lorenzo、Francisco Alonso、Miguel Yus
DOI:10.1016/s0040-4020(00)00060-0
日期:2000.3
The reaction of 3-chloro-2-(chloromethyl)prop-1-ene (1) with lithium powder and a catalytic amount of naphthalene in the presence of different electrophiles in THF at −78°C yields products 2. When carbonylic compounds are used as electrophiles the corresponding methylenic diols are obtained, which by tandem hydroboration–oxidation with alkaline hydrogen peroxide and treatment with PCC (for ketone derivatives)
Synthesis of allyl sulfoxides from allylsilanes via silyl sulfinates
作者:Agnese Stikute、Vilnis Peipiņš、Māris Turks
DOI:10.1016/j.tetlet.2015.06.018
日期:2015.7
Allylsilanes underwent sila-ene reaction with sulfur dioxide in the presence of Lewis acid catalysts. The obtained Vogel’s silyl sulfinates were found to act as sulfinyl transfer agents in reactions with aryl, heteroaryl, alkyl, and allyl Grignard reagents proceeding with the expulsion of the trialkylsilyloxy group to give allyl sulfoxides in up to 83% yield. The nucleophilic attack of Grignard reagents
Synthesis of Artemisinin-Derived Dimers, Trimers and Dendrimers: Investigation of Their Antimalarial and Antiviral Activities Including Putative Mechanisms of Action
both immobilized on TOYOPEARL AF‐Amino‐650M beads and used for massspectrometry‐based target identification experiments using total lysates of HCMV‐infected primary human fibroblasts. Two major groups of novel target candidates, namely cytoskeletal and mitochondrial proteins were obtained. Two putatively compound‐binding viral proteins, namely major capsid protein (MCP) and envelope glycoprotein pUL132
Gold-Catalyzed Dealkoxylative Carbocyclization/[3+3] Annulation Cascade of Acetal-Allene or Ketal-Allene Substrates
作者:Tse-Min Teng、Ming-Shiun Lin、Dhananjayan Vasu、Sabyasachi Bhunia、Ting-An Liu、Rai-Shung Liu
DOI:10.1002/chem.201000041
日期:2010.4.26
Rapid construction: We report the first successful implementation of a catalytic tandem carbocyclization/annulationcascade reaction (e.g., see scheme) using acetal–allene or ketal–allenesubstrates through a dealkoxylative mode. This gold catalysis enables a rapid stereocontrolled construction of oxacyclic or carbocyclic frameworks.
Convergent synthesis of a polyol chain with 4-acetoxy-1,3-dioxanes using a 1,1-bis((trimethylsilyl)methyl)ethene linchpin
作者:Scott D. Rychnovsky、Olga Fryszman、Uday R. Khire
DOI:10.1016/s0040-4039(98)80014-2
日期:1999.1
1,1-bis((trimethylsilyl)methyl)ethene, was used as a linchpin to join two different 4-acetoxy-1,3-dioxanes. These couplings produce anti-diols, and were used to prepare a segment of the roflamycoin polyol. The anti-diol selectivity normally observed on coupling 4-acetoxy-1,3-dioxanes was found to be a function of the C2 acetal substituent, and tert-butyl was superior to methyl.