Palladium-Catalyzed Site-Selective Fluorination of Unactivated C(sp<sup>3</sup>)–H Bonds
作者:Jinmin Miao、Ke Yang、Martin Kurek、Haibo Ge
DOI:10.1021/acs.orglett.5b01710
日期:2015.8.7
The transition-metal-catalyzed direct C–H bond fluorination is an attractive synthetic tool toward the preparation of organofluorines. While many methods exist for the direct sp3 C–H functionalization, site-selective fluorination of unactivated sp3 carbons remains a challenge. Direct, highly site-selective and diastereoselective fluorination of aliphatic amides via a palladium-catalyzed bidentate ligand-directed
Solid phase β-lactams synthesis using the Staudinger reaction, monitored by 19F NMR spectroscopy
作者:Isabelle Le Roy、Dominique Mouysset、Serge Mignani、Marc Vuilhorgne、Lucien Stella
DOI:10.1016/s0040-4020(03)00553-2
日期:2003.5
We report the use of 19FNMR as a simple means to monitorreactions on a solid phase. Multi-step sequences including protection, coupling, deprotection, condensation, cycloaddition and cleavage steps are described in the case of multicomponent reactions involving fluorinated α-aminoesters, aldehydes and acid chlorides.
我们报告了使用19 F NMR作为监测固相反应的简单方法。在涉及氟化α-氨基酯,醛和酰氯的多组分反应的情况下,描述了包括保护,偶联,脱保护,缩合,环加成和裂解步骤在内的多步骤序列。
Radical Decarboxylative Cyanomethylation of Aliphatic Carboxylic Acids and Uronic Acids via Vinyl Azide Cascade Fragmentation
作者:Linhua Xu、Qishuai Li、Dongwei Li、Xin Zhou、Ni Song、Peng Wang、Ming Li
DOI:10.1002/cjoc.202200732
日期:——
A direct oxidative radical decarboxylative cyanomethylation of carboxylic acids is described using 3-azido-2-methylbut-3-en-2-ol as the carbon-centered radical acceptor. The transformation is applicable to structurally diverse α-amino acids, α-oxy acids, α-keto acids, pentofuranuronic acids, and hexopyranuronic acids. The mechanistic investigations suggest that a radical process is involved in the
Redox-economical synthesis of α-substituted α-N-phthaloyl amino aldehydes using Fukuyama reduction
作者:Riko Genka、Satoru Arimitsu
DOI:10.1016/j.tetlet.2024.154938
日期:2024.3
A three-step redox-economical synthesis of α-substituted α-N-phthaloyl aldehydes was developed using Fukuyama reduction from commercially available amino acids. The developed method provided various α-substituted α-N-phthaloyl aldehydes (16 entries) in 29–98 % yields. The developed protocol was reproducible on a large scale.