A New Synthesis of Oxime Derivatives from Carbonyl Compounds and<i>N,O</i>-Bis(trimethylsilyl)hydroxylamine
作者:Robert V. Hoffman、Gregory A. Buntain
DOI:10.1055/s-1987-28092
日期:——
Reaction of a series of aldehydes and ketones with the potassium salt of N,O-bis(trimethylsilyl)hydroxylamine (2) gave high yields of the corresponding oximate anion 5. This anion, formed in a Peterson-type reaction, could be protonated to the oxime 7 or trapped in situ with a variety of electrophiles to give O-substituted oxime derivatives.8
A Convenient Method for the Synthesis of O-Tert-Butyldimethylsilyl Oximes
作者:Ortiz、Cordero、Pinto、Alverio
DOI:10.1080/00397919408011200
日期:1994.2
Aromatic, aliphatic, cyclic and acyclic O-tert-butyldimethylsilyl oximes were prepared in 77 to 85% yield by the reaction of the corresponding aldoximes and ketoximes with tert-butyldimethylchlorosilane (TBSCl) using imidazole/DMF system.
Ortiz-Marciales, Margarita; Cruz, Elmer; Alverlo, Ileana, Journal of Chemical Research, Miniprint, 1998, # 1, p. 151 - 168
作者:Ortiz-Marciales, Margarita、Cruz, Elmer、Alverlo, Ileana、Figueroa, Dyllana、Cordero, Jose F.、et al.
DOI:——
日期:——
Efficient α-alkylation and silylation of aromatic O-tert-butyldimethylsilyl ketoximes
作者:Margarita Ortiz-Marciales、Melvin De Jesús、Lemuel Quiñones、Dyliana Figueroa、Yadira L. Montes、Carlos Burgos、Benjamin Moctezuma
DOI:10.1016/s0040-4020(99)00731-0
日期:1999.10
The a-alkylation and silylation of para substituted acetophenones, 1- and 2-indanone (O-TBS) oximes at various reaction conditions, were studied. Optimum conversions from 82% to 100% were afforded for the alkylation and silylation of these (O-TBS) ketoximes with LDA at -78 degrees C, using electrophiles, such as, methyl iodide, ethylbromide, benzyl bromide and trimethylchlorosilane. (C) 1999 Elsevier Science Ltd. All rights reserved.
B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-Catalyzed Hydrogenation of Oxime Ethers without Cleavage of the NO Bond
作者:Jens Mohr、Martin Oestreich
DOI:10.1002/anie.201407324
日期:2014.11.24
The hydrogenation of oximes and oxime ethers is usually hampered by NO bond cleavage, hence affording amines rather than hydroxylamines. The boron Lewis acid B(C6F5)3 is found to catalyze the chemoselective hydrogenation of oxime ethers at elevated or even room temperature under 100 bar dihydrogen pressure. The use of the triisopropylsilyl group as a protecting group allows for facile liberation of
肟和肟醚的氢化通常受到NO键断裂的阻碍,因此提供的是胺而不是羟胺。发现硼路易斯酸B(C 6 F 5)3在升高的或什至在室温下在100巴的二氢压力下催化肟醚的化学选择性氢化。使用三异丙基甲硅烷基作为保护基可以容易地释放出游离的羟胺。