Catalytic Alkene Difunctionalization via Imidate Radicals
作者:Kohki M. Nakafuku、Stacy C. Fosu、David A. Nagib
DOI:10.1021/jacs.8b07578
日期:2018.9.12
The first catalytic strategy to harness imidate radicals has been developed. This approach enables alkene difunctionalization of allyl alcohols by photocatalytic reduction of their oxime imidates. The ensuing imidate radicals undergo consecutive intra- and intermolecular reactions to afford (i) hydroamination, (ii) aminoalkylation, or (iii) aminoarylation, via three distinct radical mechanisms. The
第一个利用酰亚胺自由基的催化策略已经开发出来。这种方法可以通过光催化还原烯丙醇的肟酰亚胺酯来实现烯丙醇的烯烃双官能化。随后的亚氨酸酯自由基经历连续的分子内和分子间反应,通过三种不同的自由基机制提供(i)氢胺化、(ii)氨基烷基化或(iii)氨基芳基化。介绍了这种亚胺酯自由基反应催化方法的广泛范围和实用性,以及与其他 N 中心自由基和互补的闭壳亚胺酯途径的比较。
Lanthanide Catalyzed Synthesis of β-Hydroxyl Amides
作者:P. Zhou、N. R. Natale
DOI:10.1080/00397919808004440
日期:1998.9
Abstract Lanthanide (III) chloride improved the reaction of carboxylic esters with β-amino alkoxides (generated in situ from β-amino alcohols) and produced β-hydroxyl amides under mild conditions, and in high yields.
Simple Methodology for the Preparation of Amino Alcohols from Amino Acid Esters Using NaBH<sub>4</sub>–Methanol in THF
作者:R. S. B. Gonçalves、A. C. Pinheiro、E. T. da Silva、J. C. S. da Costa、C. R. Kaiser、M. V. N. de Souza
DOI:10.1080/00397911.2010.481747
日期:2011.4.5
Abstract Aminoalcohols constitute a very useful and versatile class of organic compounds, with important applications in synthetic and medicinal chemistry. However, in most of the procedures described in the literature for the obtainment of these compounds, considerable limitations can be found, such as drastic conditions, long time reactions, poor yields, and purification problems. The present article
摘要 氨基醇是一类非常有用且用途广泛的有机化合物,在合成和药物化学中具有重要应用。然而,在文献中描述的用于获得这些化合物的大多数程序中,可以发现相当大的局限性,例如条件苛刻、反应时间长、收率低和纯化问题。本文描述了一种方法,该方法基于在温和条件下还原氨基酸酯,在甲醇存在下使用 NaBH4 来提供氨基醇和 N 保护的氨基醇。反应在短时间内(15-20 分钟)发生并提供 50-95% 的产率。
Pd-Catalyzed Remote δ-C(sp2)–H Functionalization in Phenylalaninol: Expanding the Library of Phenylalaninols
作者:Srinivasarao Arulananda Babu、Prabhakar Singh
DOI:10.1055/a-2147-3518
日期:2023.12
We report the Pd(II)-catalyzed, picolinamide-directed δ-C(sp2)–H (ortho) functionalization of phenylalaninol scaffolds. Assembling of (ortho) δ-C–H arylated, alkylated, benzylated, alkenylated, brominated, and iodinated phenylalaninol scaffolds was accomplished. The δ-C(sp2)–H arylation reaction of phenylalaninol occurred under neat conditions. Hydrolysis of the picolinamide moiety and synthetic utility
Palladium-Catalyzed Selective Amino- and Alkoxycarbonylation of Iodoarenes with Aliphatic Aminoalcohols as Heterobifunctional O,N-Nucleophiles
作者:László Kollár、Attila Takács、Csilla Molnár、Andrew Kovács、László T. Mika、Péter Pongrácz
DOI:10.1021/acs.joc.2c02712
日期:2023.4.21
heteroaromatic substrates and numerous related nucleophiles were tested under optimized conditions, providing moderate to good yields of the target compounds. Reactions of serinol and 1,3-diamino-2-propanol as model trifunctional compounds showed particularly high chemoselectivity on amide ester products. Considering the coordinative properties of the applied nucleophiles, a rational catalytic cycle was proposed