A Convenient Method for the Synthesis of Dialkyl Ethers by Alkylation of Alcohols Using Phosphinimidates in the Presence of a Catalytic Amount of Trimethylsilyl Triflate
作者:Hidenori Aoki、Teruaki Mukaiyama
DOI:10.1246/bcsj.79.1255
日期:2006.8
An alkylation reaction of alcohols with alkyl N-(methylsulfonyl)diphenylphosphinimidates proceeded smoothly in the presence of a catalytic amount of trimethylsilyl triflate (Me3SiOTf) in DME at roo...
Bismuth Trichloride Catalyzed Efficient Reductive Etherification of Carbonyl Compounds with Alcohols: A Novel Method for Preparation of Symmetrical and Unsymmetrical Ethers
The reductive homocoupling of a carbonylcompound and heterocoupling of a carbonylcompound with a non-protected alcohol were both effected smoothly at room temperature with triethylsilane in the presence of a catalytic amount of bismuth trichloride to afford the corresponding ethers in good yields.
Triflic Acid Catalyzed Reductive Coupling Reactions of Carbonyl Compounds with O-, S-, and N-Nucleophiles
作者:Beate A. Gellert、Nils Kahlcke、Markus Feurer、Stefanie Roth
DOI:10.1002/chem.201101819
日期:2011.10.17
Highly efficient metal‐free reductivecoupling reactions of aldehydes and ketones with a range of nucleophiles in the presence of triflic acid (1–5 mol %) as the catalyst are presented. The reactions can be performed at ambient temperature without exclusion of moisture or air. A range of symmetrical and unsymmetrical ethers were obtained by this method in high yields and short reaction times. For the
An Efficient Method for Alkylation of Alcohols with Alkyl<i>P</i>,<i>P</i>-diphenyl-<i>N</i>-(methanesulfonyl)phosphinimidates
作者:Hidenori Aoki、Teruaki Mukaiyama
DOI:10.1246/cl.2005.1016
日期:2005.7
Alkyl P,P-diphenyl-N-(methanesulfonyl)phosphinimidates, easily prepared from alkyl diphenylphosphinites and methanesulfonyl azide, are used as a useful reagent for O-alkylation of alcohols in the presence of a catalytic amount of trimethylsilyl trifluoromethanesulfonate (Me3SiOTf).
Regioselectivity of the ring opening in the reaction of phenyloxirane, (phenylmethyl)oxirane and (2-phenylethyl)oxirane with K−, K+(15-crown-5)2
作者:Zbigniew Grobelny、Andrzej Stolarzewicz、Barbara Morejko-Buż、Adalbert Maercker、Stanisław、Krompiec、Tadeusz Bieg
DOI:10.1016/s0022-328x(03)00138-4
日期:2003.4
The electron from potassiumanion of K−, K+(15-crown-5)2 (1) is initially transferred to the aromatic ring of phenyloxirane and (phenylmethyl)oxirane. The oxirane ring is then opened exclusively in the α-position. Two dimeric products, i.e. dipotassium 2,3-diphenylbutane-1,4-dioxide and dipotassium 1,3-diphenylbutane-1,4-dioxide are formed in the case of phenyloxirane. A mixture of several potassium