Synthesis and Characterization of Dibenzodioxazasiladecines
摘要:
The reaction of N-(2-hydroxymethylphenyl)salicylideneimine with sodium hydride in dry toluene at -4 degrees C produces 1,9-remote dianion. The cyclization of this dianion with diorganodichlorosilanes affords dibenzodioxazasiladecines in good yields. The products were characterized by satisfactory elemental analyses and spectral (IR, 1H, C-13, and Si-29 NMR and mass) studies.
Synthesis of Chemically and Configurationally Stable Monofluoro Acylboronates: Effect of Ligand Structure on their Formation, Properties, and Reactivities
作者:Hidetoshi Noda、Jeffrey W. Bode
DOI:10.1021/jacs.5b00822
日期:2015.3.25
tetravalent, configurationally stable B-chiral acylboronates. Significantly, the ligands on the boronate allow for fine-tuning of the properties and reactivity of acylboronates. In amide-formingligation with hydroxylamines under aqueous conditions, a considerable difference in reactivity was observed as a function of ligand structure. The solid-state structures suggested that subtle steric and conformational
Evaluation of the reactivity of eight tridentateligands derived from amino alcohols and salicylaldehyde, 2-hydroxyacetophenone, or 2-hydroxybenzophenone with ferrocenylboronicacid has shown that the reaction leads to both monomeric and dimeric ferrocenyl boronates. A coordinative N−B bond is essential to give the tetrahedral boron atoms that are responsible for the formation of heterobicyclic structures