Redox‐Neutral Selenium‐Catalysed Isomerisation of
para
‐Hydroxamic Acids into
para
‐Aminophenols
摘要:
AbstractA selenium‐catalysed para‐hydroxylation of N‐aryl‐hydroxamic acids is reported. Mechanistically, the reaction comprises an N−O bond cleavage and consecutive selenium‐induced [2,3]‐rearrangement to deliver para‐hydroxyaniline derivatives. The mechanism is studied through both 18O‐crossover experiments as well as quantum chemical calculations. This redox‐neutral transformation provides an unconventional synthetic approach to para‐aminophenols.
Nickel-Catalyzed Phosphorylation of Phenol Derivatives via C–O/P–H Cross-Coupling
作者:Jia Yang、Jing Xiao、Tieqiao Chen、Li-Biao Han
DOI:10.1021/acs.joc.6b00289
日期:2016.5.6
An efficient nickel-catalyzed phosphorylation of phenol derivatives with P(O)–H compounds via C–O/P–H cross-coupling is described. Under the reaction conditions, various phenyl pivalates coupled readily with hydrogen phosphoryl compounds to afford the corresponding coupling products aryl phosphonates and aryl phosphine oxides in good to high yields.
Synthesis and evaluation of uterine relaxant activity for a novel series of substituted p-hydroxyphenylethanolamines
作者:C.L. Viswanathan、A.S. Chaudhari
DOI:10.1016/j.bmc.2006.06.006
日期:2006.10
Novel racemic 1-(4-hydroxyphenyl)-2-[3-(substituted phenoxy)-2-hydroxy-1-propyl]aminopropan-1-ol hydrochlorides (9a-h) were synthesized by condensing racemic 1-(p-hydroxyphenyl)-2-aminopropan-1-ol hydrochloride (6) with substituted aryloxymethyloxiranes (8a-h) in DMF in presence of anhydrous potassium carbonate and then reacting with dry hydrogen chloride gas. They were evaluated for uterine relaxant
Disclosed herein are compounds of Formula (I), methods of synthesizing compounds of Formula (I), and methods of using compounds of Formula (I) as an analgesic.
本文揭示了式(I)化合物,合成式(I)化合物的方法,以及将式(I)化合物用作镇痛剂的方法。
Introduction of a Hydroxy Group at the Para Position and <i>N</i>-Iodophenylation of <i>N</i>-Arylamides Using Phenyliodine(III) Bis(Trifluoroacetate)
The reaction of anilides with phenyliodine(III) bis(trifluoroacetate) (PIFA) in trifluoroacetic acid (TFA), TFA-CHCl3, or hexafluoroisopropyl alcohol (HFIP) is described. When the acyl group of the anilide is highly electronegative, such as trifluoroacetyl, or the phenyl group is substituted with an electron-withdrawing group, the 4-iodophenyl group is transferred from PIFA to the amide nitrogen to
Highly Chemoselective Acylation of Substituted Aminophenols with 3-(Trimethylacetyl)-1,3-thiazolidine-2-thione
作者:Wei-Min Dai、Yuk King Cheung、Kit Wan Tang、Pui Yiu Choi、Suet Lam Chung
DOI:10.1016/0040-4020(95)00783-5
日期:1995.11
A general procedure for chemoselective acylation of substituted aminophenols has been developed. The N-acylated products 7 and 10a-h were prepared by treating the aminophenols with 3 (trimethylacetyl)-1,3-thiazolidine-2-thione (1) in refluxing THF in 70–100% yield. The esters 8 and 13d,b,j of 3- and 4-amino phenols could be obtained in 70–94% yield by treating with NaH and 1.