Rapid Access to Orthogonally Functionalized Naphthalenes: Application to the Total Synthesis of the Anticancer Agent Chartarin
作者:Teresa A. Unzner、Adriana S. Grossmann、Thomas Magauer
DOI:10.1002/anie.201605071
日期:2016.8.8
We report the synthesis of orthogonally functionalized naphthalenes from simple, commercially available indanones in four steps. The developed method proceeds through a two‐step process that features a thermallyinduced fragmentation of a cyclopropane indanone with simultaneous 1,2‐chloride shift. Migration of the chloride substituent occurs in a regioselective manner to preferentially afford the para‐chloronaphthol
Alkoxycyanoborates: metal salts and low-viscosity ionic liquids
作者:Nils Schopper、Jan A. P. Sprenger、Ludwig Zapf、Guido J. Reiss、Nikolai V. Ignat’ev、Maik Finze
DOI:10.1039/d0nj04950f
日期:——
measurements. In addition to alkalimetal salts, room temperature ionic liquids [EMIm][ROB(CN)3] (R = CH3, C2H5, CH2CF3) have been prepared. These ionic liquids exhibit very low melting points or glass transition temperatures, low viscosities, and high chemical, thermal, and electrochemical stabilities. The influence of alkyl chain length and the effect of partial fluorination of the alkoxy group on these properties
Enantioselective Folding of Enynes by Gold(I) Catalysts with a Remote <i>C</i><sub>2</sub>-Chiral Element
作者:Giuseppe Zuccarello、Joan G. Mayans、Imma Escofet、Dagmar Scharnagel、Mariia S. Kirillova、Alba H. Pérez-Jimeno、Pilar Calleja、Jordan R. Boothe、Antonio M. Echavarren
DOI:10.1021/jacs.9b06326
日期:2019.7.31
Chiral gold(I) catalysts have been designed based on a modified JohnPhos ligand with a distal C2-2,5-diarylpyrrolidine that creates a tight binding cavity. The C2-chiral element is close to where the C-C bond formation takes place in cyclizations of 1,6-enynes. These chiral mononuclear catalysts have been applied for the enantioselective 5-exo-dig and 6-endo-dig cyclization of different 1,6-enynes
The methoxide ion in anhydrous methanol as a Lewis base
作者:C. J. Ludman、T. C. Waddington
DOI:10.1039/j19660001816
日期:——
The reaction of a wide variety of Lewis acids with the methoxideion in methanol is reported. The reactions were followed conductometrically, and where possible the reaction products isolated and identified by analysis. Several new compounds were prepared, including the new hexa-co-ordinate iron complex, K3Fe(OCH3)6.
作者:Nicolay Yu. Adonin、Vadim V. Bardin、Hermann-Josef Frohn
DOI:10.1002/zaac.200600357
日期:2007.4
A well applicable preparative method for lithium perfluoroalkyltrimethoxyborates, Li[CnF2n+1B(OMe)3] (n = 3, 4, 6), was elaborated which is based on the reaction of B(OMe)3 with CnF2n+1Li generated from CnF2n+1H and t-BuLi. Alternative perfluoroalkylation reactions of B(OMe)3 with perfluoropropyllithium generated from C3F7I and RLi, perfluoropropylmagnesium bromide, or perfluoropropyltrimethylsilane