Insight into forced hydrogen re-arrangement and altered reaction pathways in a protocol for CO<sub>2</sub> catalytic processing of oleic acid into C<sub>8</sub>–C<sub>15</sub> alkanes
alkane products. The reaction pathway in the CO2 atmosphere is significantly different from that in the H2 atmosphere, as shown by the presence of 8-heptadecene, γ-stearolactone, and 3-heptadecene as reaction intermediates, as well as a CO formation pathway. Because of the highly dispersed Ni metal center on the zeolite support, H2 spillover is observed in the H2 atmosphere, which inhibits the production
An environmentally friendly oxidative cleavage of tetrahydrofuran‐2‐methanols to the corresponding γ‐lactones using a catalytic amount of 2‐iodo‐N‐isopropylbenzamide has been developed. The reaction of various tetrahydrofuran‐2‐methanols with the catalyst in the presence of Oxone® (2 KHSO5⋅KHSO4⋅K2SO4) as a co‐oxidant in DMF at room temperature successfully affords the corresponding lactones in good
已开发出使用催化量的2-碘-N-异丙基苯甲酰胺对四氢呋喃-2-甲醇进行环境友好的氧化裂解为相应的γ-内酯。各种四氢呋喃-2-基甲醇与催化剂在存在反应的Oxone ®(2 KHSO 5 ⋅KHSO 4 ⋅K 2 SO 4),其在室温下共氧化剂在DMF成功得到良好的相应的内酯,以高收率,并通过还原后处理即可轻松实现催化剂的回收。该方法之所以显着,是因为它可以在温和的条件下将四氢呋喃-2-甲醇转化为γ-内酯,而无需使用任何有毒的重金属。
[4-Iodo-3-(isopropylcarbamoyl)phenoxy]acetic Acid as a Highly Reactive and Easily Separable Catalyst for the Oxidative Cleavage of Tetrahydrofuran-2-methanols to γ-Lactones
product were easily separated by only liquid–liquid separation without chromatography. In addition, using a mixture of nitromethane and N,N-dimethylformamide as the solvent and heating enabled a low catalyst loading, a short reaction time, and high product yield. Oxidative cleavage using the new catalyst can be used as a practical and efficient method for synthesizing γ-lactones.
Methods for Preparing Phenolic Branched Chain Alkyl Fatty Acids or Esters Thereof and Methods for Killing Microorganisms
申请人:The United States of America, as represented by the Secretary of Agriculture
公开号:US20170253552A1
公开(公告)日:2017-09-07
Disclosed are methods for preparing phenolic branched chain fatty acids or alkyl esters thereof, involving subjecting in a pressurized container (a) at least one phenolic compound, (b) unsaturated fatty acids having 6 to 25 carbon atoms, alkyl esters thereof, or mixtures thereof, and (c) H-ferrierite zeolite catalyst in the presence of distilled water or alcohol and a nitrogen atmosphere at a temperature of about 100° C. to about 400° C. and a pressure of about 10 to about 1000 psi, and isolating saturated phenolic branched chain fatty acids or alkyl esters thereof or mixtures thereof. Also disclosed are methods for killing microorganisms on or in an object, involving contacting said object with an effective microorganisms killing amount of a composition comprising phenolic branched chain fatty acids or alkyl esters thereof, and optionally a carrier; the phenolic branched chain fatty acids or alkyl esters thereof may be produced by the methods described herein.
Mammalian exocrine secretions: X. constituents of preorbital secretion of grysbok,Raphicerus melanotis
作者:B. V. Burger、F.-C. Tien、M. Le Roux、W.-P. Mo
DOI:10.1007/bf02033583
日期:1996.4
Using electronimpact and chemicalionizationmassspectrometry with methane and nitric oxide as reactant gases in conjunction with mass spectral analysis of the dimethyl disulfide derivatives of unsaturated constituents, 51 compounds have been identified in addition to the compounds previously found in the preorbital secretion of the grysbokRaphicerus melanotis. The compounds identified are saturated