secondary alkylbromides with aryl and alkenyl triflates and nonaflates has been developed. This challenging reaction was enabled by the use of a very bulky imidazole‐based phosphine ligand, which resulted in good yields as well as good chemo‐ and site selectivities for a broad range of substrates at room temperature and under non‐aqueous conditions. This reaction was extended to primary alkyl bromides
Structures and pesticidal activities of derivatives of dinitro-phenols. Part IV. Preparation of certain 2-(α-branched alkyl)-4,6-dinitro- and 4-(α-branched alkyl)-2,6-dinitro-phenols
作者:M. Pianka、J. D. Edwards
DOI:10.1039/j39670002281
日期:——
Twenty-one 2-(α-branchedalkyl) phenols and thirty-one 4-(α-branchedalkyl) phenols with alkyl groups containing from 5 to 13 carbon atoms were synthesised by condensation, in ether, of a 2- or 4-acyl-phenol or the more soluble-anisole with an alkylmagnesium bromide, dehydration to the alkenyl derivative, hydrogenation, and, where required, demethylation of the anisole. The 2- and 4-alkyl phenols were
Et<sub>3</sub>SiH + KO<sup>t</sup>Bu provide multiple reactive intermediates that compete in the reactions and rearrangements of benzylnitriles and indolenines
作者:Andrew J. Smith、Daniela Dimitrova、Jude N. Arokianathar、Kenneth F. Clark、Darren L. Poole、Stuart G. Leach、John A. Murphy
DOI:10.1039/d0sc04244g
日期:——
unusual because it generates multiple different types of reactive intermediates simultaneously that provide access to (i) silyl radical reactions, (ii) hydrogen atom transferreactions to closed shell molecules and to radicals, (iii) electron transfer reductions and (iv) hydride ion chemistry, giving scope for unprecedented outcomes. Until now, reactions with this reagent pair have generally been explained
The compounds of the formula (I)
in which
R
1
represents hydrogen or in each case optionally substituted alkyl, alkenyl, alkynyl or phenyl are highly suitable as microbicides for protecting plants and materials.