Condition-dependent transformations between hydroximic acids and thioaceticacid were achieved. Using NH4HCO3 in the ethanol solvent, efficient N–O bond cleavage of hydroxamic acids occurred to afford primary amides with high functional group compatibility. The reaction was switched to O-acylation when NEt3 and H2O were used as the base and solvent, respectively. These facile transformations could
Oxidation system containing a macrocyclic metal complex, the production thereof and its use
申请人:Vogt Uwe
公开号:US20060217281A1
公开(公告)日:2006-09-28
Disclosed is an oxidizing system comprising a macrocyclic metal complex, an oxidizing agent and an oxidation-enhancing compound. This oxidizing system is useful under a wide variety of reaction conditions for oxidizing oxidizable substances by contacting the oxidizable substance with the specific oxidizing system. An example of a possible use is in a process for removing excess, unfixed dye from textile materials after a dyeing.
SN2 Reaction at the Amide Nitrogen Center Enables Hydrazide Synthesis
作者:Wen Fang、Zhi‐Wen Luo、Ye‐Cheng Wang、Wei Zhou、Lei Li、Yimin Chen、Xiangke Zhang、Mingji Dai、Jian‐Jun Dai
DOI:10.1002/anie.202317570
日期:2024.4.2
to the practical synthesis of hydrazides is disclosed by employing an SN2 strategy at electrophilic amides with nucleophilic amines. The reaction exhibits mild conditions, broad substrate scope, excellent functional group tolerance, easy scalability, and is applicable to the late-stage modification of various approved drug molecules, thus enabling complex hydrazide scaffold synthesis.
通过在亲电酰胺与亲核胺上采用 S N 2 策略,公开了一种用于实际合成酰肼的新 NN 偶联方法。该反应条件温和、底物范围广、官能团耐受性好、易于扩展,适用于多种已批准药物分子的后期修饰,从而实现复杂酰肼支架的合成。
Nagarajan; Rajappa; Rajagopalan, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1991, vol. 30, # 2, p. 222 - 229