PROCESS FOR PRODUCING ALDEHYDES OR KETONES BY OXIDIZING ALCOHOLS WITH OXYGEN
申请人:Ma Shengming
公开号:US20120220792A1
公开(公告)日:2012-08-30
Provided is a process for producing aldehydes or ketones by oxidizing alcohols with oxygen, which comprises oxidizing alcohols to aldehydes or ketones in an organic solvent at room temperature with oxygen or air as an oxidant, wherein ferric nitrate (Fe(NO3)3.9H2O), 2,2,6,6-tetramethylpiperidine N-oxyl (TEMPO) and an inorganic chloride are used as catalysts, the reaction time is 1-24 hours, and the molar ratio of said alcohols, 2,2,6,6-tetramethylpiperidine N-oxyl and the inorganic chloride is 100:1˜10:1˜10:1˜10. The present process has the advantages of high yield, mild reaction conditions, simple operation, convenient separation and purification, recoverable solvents, substrates used therefor being various and no pollution, and therefore it is adaptable to industrialization.
catalyzed carbonylation of 1,2-allenyl ketones 1 in the presence of p-benzoquinone (1 equiv) under a CO atmosphere (balloon) afforded difuranylketones 4 in moderate to good yields. Mechanistically, the electron-withdrawing nature of the acyl group should enhance the electrophilicity of the acylpalladium species B, and thus promote the oxypalladation of an additional molecule of 1, leading to the difuranyl
Room temperature Fe(NO3)3·9H2O/TEMPO/NaCl-catalyzed aerobic oxidation of homopropargylic alcohols
作者:Jinxian Liu、Shengming Ma
DOI:10.1016/j.tet.2013.08.082
日期:2013.11
and eco-friendly aerobicoxidation of homopropargylic alcohols using Fe(NO3)3·9H2O/TEMPO/NaCl as catalysts at roomtemperature under atmospheric pressure was developed affording corresponding homopropargylic ketones with moderate to good yields. Aryl, heteroaryl as well as alkyl 1,2-allenic ketones were obtained by the isomerization of corresponding terminal homopropargylic ketones through column chromatographic
使用的Fe homopropargylic醇的实际和生态友好的有氧氧化(NO 3)3 ·9H 2 O / TEMPO / NaCl的如在大气压下室温催化剂的开发得到对应homopropargylic酮与中度至良好的产率。芳基,杂芳基以及烷基1,2-丙二烯酮类通过柱层析后处理在硅胶上相应的端子homopropargylic酮的异构化获得的。
Indium-mediated highly regioselective reaction of prop-2-ynyl bromides with acyl cyanides in aqueous media: a convenient synthesis of allenic and propargylic ketones
作者:Byung-Woo Yoo、Sung-Jae Lee、Kwang-Hyun Choi、Sam-Rok Keum、Jae-Jung Ko、Kyung-Il Choi、Joong-Hyup Kim
DOI:10.1016/s0040-4039(01)01494-0
日期:2001.10
Indium-mediatedreaction of acyl cyanides 1 with prop-2-ynyl bromides 2 in aqueousmedia occurs regioselectively to afford either allenic 3 or propargylic ketones 4 depending on the γ-substituent of the prop-2-ynyl bromide under the mild conditions.
Treatment of 1-allenyl-1-diethynyl acetates in the presence of a Au or Pt catalyst (5 mol%) in toluene at room temperature, followed by methanolysis, gave 4-methylene-2-cyclopentenones. The new cationic bisoxazoline (box)-Au(III) complex (S,S)-Phbox- or [(R,R)-Bnbox AuCl2]SbF6} accelerated the reaction, providing the products in moderate yield (60-69%).