β-Scission of the N−O Bond in Alkyl Hydroxamate Radicals: A Fast Radical Trap
摘要:
[GRAPHICS]dThe rate of the beta-scission of the N-O bond in the alkyl hydroxamate radical is faster than 2 x 10(8) s(-1). This reaction may be useful as a radical trap.
β-Scission of the N−O Bond in Alkyl Hydroxamate Radicals: A Fast Radical Trap
摘要:
[GRAPHICS]dThe rate of the beta-scission of the N-O bond in the alkyl hydroxamate radical is faster than 2 x 10(8) s(-1). This reaction may be useful as a radical trap.
Reductive Synthesis of Aminal Radicals for Carbon–Carbon Bond Formation
作者:David A. Schiedler、Yi Lu、Christopher M. Beaudry
DOI:10.1021/ol500024q
日期:2014.2.21
Aminal radicals were generated by reduction of the corresponding amidine or amidinium ion. The intermediate radicals participate in C–C bond-forming reactions to produce fully substituted aminal stereocenters. No toxic additives or reagents are required. More than 30 substrate combinations are reported, and chemical yields are as high as 99%.
Asymmetric Reaction of α-Diazomethylphosphonates with α-Ketoesters To Access Optically Active α-Diazo-β-hydroxyphosphonate Derivatives
作者:Fei Du、Jiao Zhou、Yungui Peng
DOI:10.1021/acs.orglett.7b00128
日期:2017.3.17
The first example for asymmetric reaction of diazomethylphosphonates with α-ketoesters was realized in the catalysis of hydroquinidine-derived bifunctional thiourea. A methodology was established to access a series of chiral α-diazo-β-hydroxyphosphonate derivatives containing various functional groups with high enantioselectivities and yields. The resulting products could be further transformed into
Scandium-Catalyzed Electrochemical Synthesis of α-Pyridinyl Tertiary Amino Acids and Esters
作者:Feng Liu、Weijie Ding、Jiacong Lin、Xu Cheng
DOI:10.1021/acs.orglett.3c02734
日期:2023.10.27
α-Pyridyl tertiaryamino acids have potential pharmaceutical applications because of their structural features. However, their synthesis is still highly limited. Herein, we report a straightforward approach for the electrochemical synthesis of tertiary α-substituted amino acid derivatives via three-component reductive coupling. Using gaseous ammonia as both the N and H source, the α-keto ester reacts
α-吡啶基叔氨基酸由于其结构特征而具有潜在的药物应用。然而,它们的合成仍然非常有限。在此,我们报告了一种通过三组分还原偶联电化学合成叔α-取代氨基酸衍生物的简单方法。使用气态氨作为 N 源和 H 源,α-酮酯直接与 4-CN-吡啶反应。钪催化的应用是实现各种副反应途径化学选择性的关键。