We report here a C–H homoallylation reaction of aromaticketones with methylenecyclopropanes (MCPs) only using a catalytic amount of Fe(PMe3)4. A variety of aromaticketones and MCPs are applicable to the reaction to form ortho-homoallylated aromaticketones selectively via regioselective scission of the three-membered rings. The homoallylated products are amenable to further elaborations, providing
Photocatalytic Carbinol Cation/Anion Umpolung: Direct Addition of Aromatic Aldehydes and Ketones to Carbon Dioxide
作者:Shintaro Okumura、Yasuhiro Uozumi
DOI:10.1021/acs.orglett.1c02592
日期:2021.9.17
We have developed a new photocatalytic umpolung reaction of carbonyl compounds to generate anionic carbinol synthons. Aromaticaldehydes or ketones reacted with carbon dioxide in the presence of an iridium photocatalyst and 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzimidazole (DMBI) as a reductant under visible-light irradiation to furnish the corresponding α-hydroxycarboxylic acids through nucleophilic
Synthesis of ketones via organolithium addition to acid chlorides using continuous flow chemistry
作者:Soo-Yeon Moon、Seo-Hee Jung、U. Bin Kim、Won-Suk Kim
DOI:10.1039/c5ra14890a
日期:——
An efficient method for the synthesis of ketones using organolithium and acid chlorides under continuousflow conditions has been developed. In contrast to standard batch chemistry, over-addition of the organolithium to the ketone for the formation of the undesired tertiary alcohol has been minimised representing a direct approach toward ketones.
The present invention relates to compounds that inhibit of a5
b
1 function, processes for their preparation, pharmaceutical compositions containing them as the active ingredient, to their use as medicaments and to their use in the manufacture of medicaments for use in the treatment in warm-blooded animals such as humans of diseases that have a significant angiogenesis or vascular component such as for treatment of solid tumours. The present invention also relates to compounds that inhibit a5
b
1 and also that exhibit appropriate selectivity profile(s) against other integrins.
The present invention relates to compounds that inhibit of a5b1 function, processes for their preparation, pharmaceutical compositions containing them as the active ingredient, to their use as medicaments and to their use in the manufacture of medicaments for use in the treatment in warm blooded animals such as humans of diseases that have a significant angiogenesis or vascular component such as for treatment of solid tumours. The present invention also relates to compounds that inhibit a5b1, and also that exhibit appropriate selectivity profile(s) against other integrins.