Silver-catalyzed Double Decarboxylative Radical Alkynylation/Annulation of Arylpropiolic Acids with α-keto Acids: Access to Ynones and Flavones under Mild Conditions
Ynones are privileged buildingblocks in various organic syntheses of heterocyclicderivatives due to their multifunctional nature, and flavones are an important class of natural products with a wide range of biological activities. We describe the catalytic double decarboxylative alkynylation of arylpropiolic acids with α‐keto acids. With Ag(I)/persulfate as the catalysis system, the valuable ynones
Copper-catalyzed coupling of anthranils and α-keto acids: direct synthesis of α-ketoamides
作者:Ping-Gui Li、Hao Zhu、Min Fan、Cheng Yan、Kai Shi、Xi-Wen Chi、Liang-Hua Zou
DOI:10.1039/c9ob00822e
日期:——
Copper-catalyzed coupling of α-keto acids with anthranils is reported for the synthesis of α-ketoamides. This process involves N-O/C-O bond cleavages and C-N bond formation. Furthermore, the decarboxylation of α-keto acids can be successfully suppressed under redox-neutral conditions.
A facile and efficient one-pot, single-step method for deracemizing a broad range of 2-hydroxyacids to (R)-2-hydroxyacids was established by combination of resting cells of an (S)-hydroxyacid dehydrogenase-producing microorganism and an (R)-ketoacid reductase-producing microorganism.
通过将产生(S)-羟酸脱氢酶的微生物的静止细胞与( R)-产生酮酸还原酶的微生物。
Ag-catalyzed decarboxylative acylation of pyridazines using α-keto acids in aqueous media
作者:Shengqiang Wang、Xiaobo Xu、Dapeng Zou、Qijie Xu
DOI:10.1016/j.tetlet.2020.152691
日期:2021.1
An efficient and general protocol for Ag-Catalyzed decarboxylative acylation of pyridazines using α-keto acids as acylation reagent in aqueous media has been described. This method provides a new avenue for the synthesis of diverse array of acylated pyridazines with different substitution patterns. The reaction proceeds smoothly in water under mild conditions and exhibits a good functional group tolerance