Site-specific incorporation of the 1-hexanol-1,N6-etheno-2′-deoxyadenosine adduct into oligodeoxyribonucleotides
摘要:
Modified oligonucleotides that contain the hydrophobic 1-hexanol-1,N-6-etheno-2'-deoxyadenosine adduct have been synthesized using a mild solid phase phosphoramidite chemistry. The presence and the integrity of the modified nucleoside in the synthetic oligomers were confirmed by electrospray ionization and MALDI mass spectrometry measurements together with analysis of the complete enzymatic hydrolysate by high performance liquid chromatography coupled to UV and fluorescent detection techniques. (C) 2003 Elsevier Science Ltd. All rights reserved.
Synthesis of Six Epoxyketooctadecenoic Acid (EKODE) Isomers, Their Generation from Nonenzymatic Oxidation of Linoleic Acid, and Their Reactivity with Imidazole Nucleophiles
作者:De Lin、Jianye Zhang、Lawrence M. Sayre
DOI:10.1021/jo701373f
日期:2007.12.1
of six EKODE regio- and stereoisomers, two trans α‘,β‘-epoxy-α,β-enones, and two trans and the two cis γ,δ,-epoxy-α,β-enones was accomplished, with the key steps being Wittig-type reactions and aldol condensations. All six EKODE isomers were confirmed by HPLC to be generated in the autoxidation of linoleic acid promoted by Fe(II)/ascorbic acid through spiking in of authentic samples. On the basis of
Polymer supported perruthenate (PSP): a new oxidant for clean organic synthesis
作者:Berthold Hinzen、Steven V. Ley
DOI:10.1039/a703461j
日期:——
A polymer supported perruthenate reagent has been prepared and
used in the conversion of primary and secondary alcohols to aldehydes
and ketones, respectively, affording pure products without the need for
conventional work-up procedures.
Oxidation Catalysis of Nb(salan) Complexes: Asymmetric Epoxidation of Allylic Alcohols Using Aqueous Hydrogen Peroxide as an Oxidant
作者:Hiromichi Egami、Takuya Oguma、Tsutomu Katsuki
DOI:10.1021/ja100795k
日期:2010.4.28
Several opticallyactive Nb(salan) complexes were synthesized, and their oxidation catalysis was examined. A dimeric mu-oxo Nb(salan) complex that was prepared from Nb(OiPr)(5) and a salan ligand was found to catalyze the asymmetric epoxidation of allylicalcohols using a urea-hydrogen peroxide adduct as an oxidant with good enantioselectivity. However, subsequent studies of the time course of this
合成了几种光学活性 Nb(salan) 配合物,并研究了它们的氧化催化作用。发现由 Nb(OiPr)(5) 和 salan 配体制备的二聚体 mu-oxo Nb(salan) 复合物可催化烯丙醇的不对称环氧化,使用尿素-过氧化氢加合物作为氧化剂,具有良好的对映选择性。然而,随后对该环氧化的时间过程以及配体的 ee 与产物的 ee 之间关系的研究表明,mu-氧代二聚体在环氧化之前解离成单体物质。而且,发现由 Nb(OiPr)(5) 和 salan 配体原位制备的单体 Nb(salan) 配合物,然后进行水处理,发现使用过氧化氢水溶液在 CHCl(3)/盐水或甲苯/盐水溶液中更好地催化烯丙醇的环氧化具有高对映选择性,范围从 83% 到 95% ee,除了肉桂醇的反应显示 74% 的中等 ee。这是使用过氧化氢水溶液作为氧化剂对烯丙醇进行高度对映选择性环氧化的第一个例子。
The reactions of 2,3-epoxyaldehydes with methoxymethylenetriphenylphosphorane. Enantioselective syntheses of (E)-4-hydroxyalk-2-enals
作者:Libing Yu、Zhiqin Wang
DOI:10.1039/c39930000232
日期:——
The reactions of 2,3-epoxyaldehydes with methoxymethylenetriphenylphosphorane in tetrahydrofuran provide directly (E)-4-hydroxy-2-enals with the retention of configuration.
BITTER TASTE MODIFIERS INCLUDING SUBSTITUTED 1-BENZYL-3-(1-(ISOXAZOL-4-YLMETHYL)-1H-PYRAZOL-4-YL)IMIDAZOLIDINE-2,4-DIONES AND COMPOSITIONS THEREOF
申请人:SENOMYX, INC.
公开号:US20160376263A1
公开(公告)日:2016-12-29
The present invention includes compounds and compositions known to modify the perception of bitter taste, and combinations of said compositions and compounds with additional compositions, compounds, and products. Exemplary compositions comprise one or more of the following: cooling agents; inactive drug ingredients; active pharmaceutical ingredients; food additives or foodstuffs; flavorants, or flavor enhancers; food or beverage products; bitter compounds; sweeteners; bitterants; sour flavorants; salty flavorants; umami flavorants; plant or animal products; compounds known to be used in pet care products; compounds known to be used in personal care products; compounds known to be used in home products; pharmaceutical preparations; topical preparations; cannabis-derived or cannabis-related products; compounds known to be used in oral care products; beverages; scents, perfumes, or odorants; compounds known to be used in consumer products; silicone compounds; abrasives; surfactants; warming agents; smoking articles; fats, oils, or emulsions; and/or probiotic bacteria or supplements.