Catalytic Asymmetric [4+2]-Cycloaddition of Dienes with Aldehydes
作者:Luping Liu、Hyejin Kim、Youwei Xie、Christophe Farès、Philip S. J. Kaib、Richard Goddard、Benjamin List
DOI:10.1021/jacs.7b08357
日期:2017.10.4
Despite its significant potential, a general catalytic asymmetric [4+2]-cycloaddition of simple and electronically unbiased dienes with any type of aldehyde has long been unknown. Previously developed methodologies invariably require activated, electronically engineered substrates. We now provide a general solution to this problem. We show that highly acidic and confined imidodiphosphorimidates (IDPis)
A convenient approach for the synthesis of 1,3,5-trioxanes under solvent-free conditions at room temperature
作者:Xinzhong Li、Qi Lin、Rong Cao
DOI:10.1007/s00706-014-1150-8
日期:2014.6
environmentally benign bis-SO3H-functionalized Brønsted acidic ionic liquids were synthesized by using aliphatic polyamines and 1,3-propanesultone as the source chemicals. These ionic liquids acted as efficient inexpensive and recyclable catalysts for cyclotrimerization of aliphatic aldehydes at room temperature under solvent-free conditions. The reactions proceeded smoothly with good to excellent isolated yields
Oxidation of primary alcohols to aldehydes catalyzed by ruthenium compounds
作者:Yu. N. Ogibin、A. I. Ilovaiskii、G. I. Nikishin
DOI:10.1007/bf00959639
日期:1991.1
The RuCl3 and RuO2.nH2O catalyzed oxidation of alkanes, aromatic fatty acids, alcohols, citronellol, and hydroxycitronellol by NaOCl was studied in the diphase system CCl4-aqueous NaOCl at pH 13-13.5. At 60-65-degrees-C, using 1-2 mole % of catalyst and a 1.5-fold molar excess of NaOCl, primary alkanols (hexanol-1, 2-ethylhexanol-1, decanol-1, hexadecanol-1) benzyl and 3-phenyl-propyl alcohols, and hydroxycitronellol are converted to the corresponding aldehydes with a selectivity of 70-90% and a yield of over 75%.
Sato, Satoshi; Furuta, Hiromi; Sodesawa, Toshiaki, Journal of the Chemical Society. Perkin transactions II, 1993, # 3, p. 385 - 390
A convenient solvent-free preparation of 1,3,5-trioxanes
作者:Jacques Augé、Richard Gil
DOI:10.1016/s0040-4039(02)01899-3
日期:2002.10
In the presence of a small amount of trimethylsilyl chloride, aldehydes gave at room temperature in solvent-free conditions the corresponding 1,3,5-trioxanes with good to excellent yields. (C) 2002 Elsevier Science Ltd. All rights reserved.