Lewis acid promoted conjugate addition of vinylmagnesium bromide to chiral α,β-unsaturated N-acyl oxazolidinonesoxazole derivativesstereochemistry (general, optical resolution)addition reactionsChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about...
bridged Pd/Zn binuclear complex is the most plausible candidate for the intermediate. The plausibility of this structure was also supported by the peak shift observed in1H NMR spectra to a higher magnetic field (Hain Fig.3d). Two-dimensional NMR and DFT analyses of6revealed that the aromatic ...
Finally,vinyliccarbocations, in which the positive charge resides on a double-bonded carbon, are very unstable and thus much less likely to form as intermediates in any reaction. For the most part, carbocations are very high-energy, transient intermediate species in organic reactions. However, t...
After 5 min in an ultrasonic bath, 70 mg methyl vinyl ketone (1.0 mmol; 1.0 eq.) were added at 25 °C. After vigorous stirring for 24 h at 25 °C, 2.0 g distilled water were added to the reaction mixture which was subsequently extracted using 10 mL ethyl acetate. The organic phase...
(including mono- and di-alkyl phosphine and tri-alkylphosphonium), zwitterionic, hydroxyl, vinyloxycarbonyl and other vinylic and allylic groups, and reactive silyl and silyloxy groups, such as trialkoxysilyl groups; or R26 and R25 or R25 and R23 may together form —CONR28CO in which R28 ...
structure of C1-C7 group which may be saturated or unsaturated and cyclic or non-cyclic, and which optionally may be substituted with any of the above preceding groups, including hydrocarbon compounds acetaldehyde, butyraldehydej glutaric dialdehyde, crotonaldehyde, benzaldehyde, acetone, methyl vinyl ...
Vinyl-substituted chiral salens (salen=bis(salicylidene)ethylidenediamine) are used for attachment to Me3Si-hydrophobized silica gel (controlled-pore glass... AH And,D Seebach - 《Helvetica Chimica Acta》 被引量: 131发表: 2002年 Biocatalytic approaches to hetero-Diels-Alder adducts of carbonyl ...
structure of C1-C7 group which may be saturated or unsaturated and cyclic or non-cyclic, and which optionally may be substituted with any of the above preceding groups, including hydrocarbon compounds acetaldehyde, butyraldehyde, glutaric dialdehyde, crotonaldehyde, benzaldehyde, acetone, methyl vinyl ...