formations between allyl carbonates and nontoxic allyl, allenyl, or propargyl boronates. This report represents the first use of these types of boronicesters in this particular context. The present transformations proceeded with high selectivity under remarkably mild conditions, and various functional groups including an aldehyde function proved to be compatible. In addition, several boronates were found
A new catalytic approach to selective functionalization of the strong C−F bonds in polyfluorinated aliphatic esters and amides is reported, affording a diverse array of important partially fluorinated motifs through hydrodefluorination, defluoroalkylation, and defluoroalkenylation. Straightforward downstream chemistry towards fluorinated alcohols, amines and drug derivatives highlights the potential
A manufacturing method for one of, or a mixture of, an optically active allylboron compound and racemic or optically active boryl cyclopropane, including a coupling reaction, in the presence of a catalyst, between allyl compound and diboron compound. It is preferred that a copper (I) complex is used as the catalyst. It is preferred that a counterion of the copper (I) complex is an alkoxide or a hydride. It is preferred that the copper (I) complex has a phosphine ligand. It is preferred that the phosphine ligand is a chiral phosphine ligand.
We developed catalytic intermolecular C(sp(3))-C(sp(3)) cross-couplings between various allyl alcohols and allyl boronates, which proceeded smoothly in the presence of nickel(0) under mild conditions to form 1,5-dienes with excellent linear- and gamma-selectivity; the use of boronates proved to be crucial in terms of reactivity.
Light-driven radical-polar crossover catalysis for cross-coupling with organosilanes
作者:Tomotoki Matsuo、Kazunori Nagao、Hirohisa Ohmiya
DOI:10.1016/j.tetlet.2022.154231
日期:2022.12
enabling the cross-couplingbetween aliphatic carboxylic acid-derived redox active esters and organosilanes. In this protocol, a carbocation equivalent generated from the redox active ester by radical-polar crossover process could react with an organosilane reagent. This protocol allows to forge C(sp3)–C(sp3), C(sp3)–C(sp2) and C(sp3)–C(sp) bonds under transition-metal free and mild reaction conditions