Highly efficient arylations of β‐chloro ketones and their ester and amide derivatives were achieved by means of domino dehydrochlorination/Rh(I)‐catalyzed conjugate addition. In situ generated vinyl ketones and their analogues were identified as the reaction intermediates. The present synthetic protocol provides a concise route to (chiral) β‐aryl ketones, esters, and amides.
in organic synthesis. Herein, a hybrid heterogeneouscatalyst, palladium(0) on copper ferrite nanowires, has been synthesized, characterized, and for the first time, employed in the Jeffrey Heck reaction between iodoarenes and allylic alcohols, and good to excellent yields have been obtained. In addition, the catalyst was found to be suitable for the usual Heck coupling. The nanocatalyst was recovered
atom efficient ‘trifluoroacetic ester/ketone metathesis’ has been sincerely witnessed. Enolizable alkyl (at least two non-hydrogen atoms) aryl ketones were found to react readily with ethyl trifluoroacetate under the promotion of NaH to afford trifluoroacetic ester/ketone exchange products, trifluoromethyl ketones (TFMKs), and aromatic acid esters, which were quite different from the general Claisen
The synthesis of spiroisoxazoline molecules has been developed via anodic oxidative dearomatization of 4-methoxybenzyl oximes. The reaction is thought to proceed through 5-exo C−O bond-forming cyclization of oxime radicals with arenes on the basis of cyclic voltammetry studies. Moreover, spiroisoxazolines can be built directly from readily available carbonyl tethered phenolics via an oximation/dearomatization
已通过 4-甲氧基苄基肟的阳极氧化脱芳构化开发了螺异恶唑啉分子的合成。根据循环伏安法研究,该反应被认为是通过肟自由基与芳烃的 5 - exo CO-O 键环化来进行的。此外,螺异恶唑啉可以通过肟化/脱芳构化级联直接由容易获得的羰基束缚酚醛树脂构建。以这种螺异恶唑化为关键步骤,黄硫异恶唑啉 B 的首次全合成分三步完成。