Preparation of polyfunctional nitro olefins and nitroalkanes using the copper-zinc reagents RCu(CN)ZnI
摘要:
The addition of the copper-zinc reagents RCu(CN)ZnX to a variety of nitro olefins produces polyfunctional nitroalkanes in high yields. The intermediate zinc or copper nitronates can be directly submitted to a Nef reaction (O3,-78-degrees-C) and converted to polyfunctional ketones in a one-pot procedure. The addition of RCu(CN)ZnX to nitro olefins bearing a leaving group (RSO2, RS) in the beta-position provides pure (E)-nitro olefins in excellent yields. The reaction has been applied for the stereoselective preparation of 1,3-nitrodienes and for a Diels-Alder reaction precursor.
Addition of tetrahydrothiophene (THT) to THF solution of bis(iodozincio)methane modified the stability and reactivity: EXAFS analysis indicated that THF stabilizes bis(iodozincio)methane in a monomeric structure; the species reacts with acyl chlorides to give 1,3-diketones.
Herein, by dual C–O bond cleavage of cyclic ethers with Cu catalysis, we eventually led to the development of a selective three-component coupling of commercially available chemicals, carboxylic acids, ethers, and halogens to synthesize more than 70 iodoalkyl esters in the presence of TMSCF3. This allows for the concise synthesis of highly functionalized iodoalkyl esters directly. And the synthetic
在此,通过在 Cu 催化下环状醚的双 C-O 键断裂,我们最终开发了市售化学品、羧酸、醚和卤素的选择性三组分偶联,以合成超过 70 种碘代烷基酯。 TMSCF 3的存在。这允许直接简明合成高度官能化的碘代烷基酯。并且还公开了合成昆虫信息素。