Understanding Ketone Hydrodeoxygenation for the Production of Fuels and Feedstocks From Biomass
摘要:
Although we can efficiently convert bioderived furans into linear alkanes, the most energy-intensive step in this approach is the hydrodeoxygenation of the intermediate polyketone. To fully understand this process, we have examined the hydrodeoxygenation of a model compound, 3-pentanone, which allows us to follow this process stepwise using Pd/C, H-2 (200 psi), and La(OTf)(3) in acetic acid to remove the oxygen atom at temperatures between 25 and 200 degrees C. We have found that ketone reduction to an alcohol is followed by acetoxylation, which provides a more facile route to C-O bond cleavage relative to the parent alcohol.
Understanding Ketone Hydrodeoxygenation for the Production of Fuels and Feedstocks From Biomass
摘要:
Although we can efficiently convert bioderived furans into linear alkanes, the most energy-intensive step in this approach is the hydrodeoxygenation of the intermediate polyketone. To fully understand this process, we have examined the hydrodeoxygenation of a model compound, 3-pentanone, which allows us to follow this process stepwise using Pd/C, H-2 (200 psi), and La(OTf)(3) in acetic acid to remove the oxygen atom at temperatures between 25 and 200 degrees C. We have found that ketone reduction to an alcohol is followed by acetoxylation, which provides a more facile route to C-O bond cleavage relative to the parent alcohol.
PRODRUGS OF NH-ACIDIC COMPOUNDS: ESTER, CARBONATE, CARBAMATE AND PHOSPHONATE DERIVATIVES
申请人:Blumberg Laura Cook
公开号:US20110319422A1
公开(公告)日:2011-12-29
The invention provides a method of sustained delivery of a lactam, imide, amide, sulfonamide, carbamate or urea containing parent drug by administering to a patient an effective amount of a prodrug compound of the invention wherein upon administration to the patient, release of the parent drug from the prodrug is sustained release. Prodrug compounds suitable for use in the methods of the invention are labile conjugates of parent drugs that are derivatized through carbonyl linked prodrug moieties. The prodrug compounds of the invention can be used to treat any condition for which the lactam, imide, amide, sulfonamide, carbamate or urea containing parent drug is useful as a treatment.
USE OF DITHIINE-TETRACARBOXIMIDES FOR CONTROLLING PHYTOPATHOGENIC FUNGI
申请人:SEITZ Thomas
公开号:US20100120884A1
公开(公告)日:2010-05-13
The present invention relates to the use of novel and of known dithiine-tetracarboximides for controlling phytopathogenic fungi, and to methods of controlling phytopathogenic fungi in plant protection, and to plant protection compositions comprising these dithiine-tetracarboximides.
The reaction of lead tetraacetate with hydrocarbons
作者:Melvyn W. Mosher、Jeffery L. Cox
DOI:10.1016/s0040-4039(00)89242-4
日期:1985.1
The free radical reaction of leadtetraacetate with hydrocarbons has been investigated. The products of these reactions are the acetate esters. The hydrogen abstracting species from leadtetraacetate is found to have a primary to secondary to tertiary selectivity of 1:27:123 based upon relative reactivities.
acetylation of (hydroxyalkyl) phenols as well as for the kinetic resolution of chiral secondary alcohols. Lastly, its discrimination power was demonstrated in competitive experiments of equimolar mixtures of two isomeric alcohols. This enabled the practical synthesis of 1-pentyl acetate isolated as a single product in 68% yield from the equimolar mixture of 1-pentanol and 3-pentanol.
Acid-induced 13C nuclear magnetic resonance chemical shift changes of ether and ester carbon atoms
作者:Mikael Begtrup
DOI:10.1039/p29830001609
日期:——
13 C N.m.r. chemicalshifts of ethers dissolved in tetrachloromethane are displaced on addition of trifluoroacetic acid. The displacements result from independent interactions of the acid with the substrate oxygen atoms and alkyl residues. The structure-dependent and stereoselective shiftchanges are useful for signal assignments, structure determination, conformational analysis, assessment of the
溶解在四氯甲烷中的醚的13 C Nmr化学位移可通过添加三氟乙酸来置换。位移是由酸与底物氧原子和烷基残基的独立相互作用导致的。依赖于结构的和立体选择性的移位变化可用于信号分配,结构确定,构象分析,评估酯的快速互变构象异构体的分布以及估算醚的相对碱性。