Photoinduced, Copper-Catalyzed Alkylation of Amides with Unactivated Secondary Alkyl Halides at Room Temperature
作者:Hien-Quang Do、Shoshana Bachman、Alex C. Bissember、Jonas C. Peters、Gregory C. Fu
DOI:10.1021/ja4126609
日期:2014.2.5
The development of a mild and general method for the alkylation of amides with relatively unreactive alkyl halides (i.e., poor substrates for SN2 reactions) is an ongoing challenge in organic synthesis. We describe herein a versatile transition-metal-catalyzed approach: in particular, a photoinduced, copper-catalyzed monoalkylation of primary amides. A broad array of alkyl and aryl amides (as well as
开发一种温和而通用的方法,用相对不活泼的卤代烷(即 SN2 反应的不良底物)对酰胺进行烷基化是有机合成中的一个持续挑战。我们在此描述了一种通用的过渡金属催化方法:特别是光诱导、铜催化的伯酰胺单烷基化。一系列广泛的烷基和芳基酰胺(以及内酰胺和 2-恶唑烷酮)与未活化的仲(和受阻伯)烷基溴和碘结合使用一组相对简单和温和的条件:廉价的 CuI 作为催化剂,无需单独添加配体,并在室温下形成 CN 键。该方法与多种官能团兼容,例如烯烃、氨基甲酸酯、噻吩和吡啶,并已应用于阿片受体拮抗剂的合成。一系列机械观察,包括反应性和立体化学研究,与耦合途径一致,包括铜-酰胺络合物的光激发,然后是电子转移以形成烷基。
Acceptorless dehydrogenative synthesis of primary amides from alcohols and ammonia
existing catalytic systems instead generate other N-containing products, e.g., amines, imines and nitriles. Herein, we demonstrate an efficient and selective ruthenium-catalyzed synthesis of primary amides from alcohols and ammonia gas, accompanied by H2 liberation. Various aliphatic and aromatic primary amides were synthesized in high yields, with no observable N-containing byproducts. The selectivity
通过无受体脱氢偶联直接从醇和氨合成广泛使用的伯酰胺是一种非常理想的方法,这代表了一种清洁、原子经济、可持续的过程。然而,这样的反应以前没有被报道过,并且现有的催化系统反而生成其他含氮产物,例如胺、亚胺和腈。在此,我们展示了一种高效、选择性的钌催化的由醇和氨气合成伯酰胺的方法,并伴随着 H 2 的释放。以高产率合成了各种脂肪族和芳香族伯酰胺,没有观察到含氮副产物。该系统对伯酰胺形成的选择性通过密度泛函理论(DFT)计算合理化,这表明半缩醛胺中间体脱氢成伯酰胺比脱水成亚胺更有利。
The present invention provides fungicidal 4-substituted-3-phenyl[(heterocyclylmethoxy)imino]methyl}-1,2,4-oxadiazol-5(4H)-one derivatives of formula (I)
wherein A represents a pyridyl or thiazole group and X1, Y1 to Y5 represent independently different substituents.
Copper-catalyzed synthesis of primary amides through reductive N–O cleavage of dioxazolones
作者:Hyeonwoong Bae、Jinhwan Park、Rahyun Yoon、Seunghoon Lee、Jongwoo Son
DOI:10.1039/d4ra00320a
日期:——
method for the synthesis of primary amides is developed, in which dioxazolones are treated with a copper catalyst under mild reaction conditions. A broad scope of dioxazolones is exhibited as well as dioxazolones containing biologically active structural motifs. These robust and mild reaction conditions allow the transformation of dioxazolones to primary amides, in which sensitive functional groups
METHOD FOR SEARCHING FOR MALODOR CONTROL AGENT, MALODOR CONTROL AGENT, AND MALODOR CONTROL METHOD
申请人:Kao Corporation
公开号:EP2612923A1
公开(公告)日:2013-07-10
Provided are a method for searching for a malodor inhibitor by using the response of an olfactory receptor as an indicator; a method for inhibiting malodor based on the antagonism of olfactory receptors; and a malodor inhibitor. Disclosed are a method for searching for a malodor inhibitor, the method including: adding a test substance and a malodor-causing substance to any one olfactory receptor selected from the group consisting of OR51E1, OR2W1, OR10A6, OR51I2, and OR51L1, measuring the response of the olfactory receptor to the malodor-causing substance, identifying the test substance that suppresses the response of the olfactory receptor on the basis of the measured response, and selecting the identified test substance as a malodor inhibitor; an antagonist to any one olfactory receptor selected from the group consisting of OR51E1, OR2W1, OR10A6, OR51I2, and OR51L1; a method for inhibiting malodor using the antagonist.