Transition Metal‐Free N−S Bond Cleavage and C−N Bond Activation of Ugi‐Adducts for Rapid Preparation of Primary Amides and α‐Ketoamides
作者:Chao Liu、Johan Van der Eycken、Erik V. Van der Eycken
DOI:10.1002/chem.202301541
日期:2023.9.21
combination of an Ugi-4CR and a transition metal-free selective N−S bond cleavage and C−N bond activation, diverse primary amides and α-ketoamides were simultaneously obtained in a highly efficient, rapid, and step-economical manner. The reaction features broad substrate scope, excellent functional-group tolerance, and exclusive selectivity. Primary amides derived from the pharmaceuticals probenecid and febuxostat
primary allylicamines was substituted directly by sulfinate salts with excellent regio- and stereoselectivities. In the presence of 0.1 mol % [Pd(allyl)Cl](2), 0.4 mol % 1,4-bis(diphenylphosphino)butane (dppb), and excess boric acid, a range of α-unbranched primary allylicamines were smoothly substituted with sodium sulfinates in an α-selective fashion to give structurally diverse allylic sulfones
Highly efficient synthesis of primary amides <i>via</i> aldoximes rearrangement in water under air atmosphere catalyzed by an ionic ruthenium pincer complex
作者:Fa-Liu Yang、Xinju Zhu、Dun-Kang Rao、Xiao-Niu Cao、Ke Li、Yan Xu、Xin-Qi Hao、Mao-Ping Song
DOI:10.1039/c6ra07515k
日期:——
aldoximes to primary amides has been evaluated using pincer ruthenium complexes a–c, among which the ionic Ru catalyst a proved to be the most efficient in water under air atmosphere. A variety of (hetero)arene aldoximes proceeded smoothly to afford amides in high yields with good functional group compatibilities. Furthermore, a direct syntheticroute of amides from aldehydes, hydroxylamine hydrochloride