Synthetic Studies on the Natural Product Myrsinoic Acid F Reveal Biologically Active Analogues
作者:Jiri Mikusek、Jeremy Nugent、Jas S. Ward、Brett D. Schwartz、Alison D. Findlay、Jonathan S. Foot、Martin G. Banwell
DOI:10.1021/acs.orglett.8b01558
日期:2018.7.6
The synthesis of the structure, 1, assigned to the anti-inflammatory natural product myrsinoic acid F is reported together with a means for preparing its Z-isomer 21. While neither of these compounds corresponds to the natural product, both of them are anti-inflammatory agents (as determined using a mouse ear edema assay) with congener 1 being notably more potent than the widely prescribed NSAID indometacin
First syntheses of (2S, 3S)- and (2S, 3R)-m-prenyl-β-hydroxytyrosine derivatives: Bioactive amino acid fragment of a substance P antagonist novel cyclic heptapeptide
作者:Jalluri S. Ravi Kumar、Apurba Datta
DOI:10.1016/s0040-4039(96)02298-8
日期:1997.1
A stereodefined synthesis of both the C-3 isomers of the title tyrosine related new amino acid 3 has been achieved starting from D-serine and 4-bromophenol.
从D-丝氨酸和4-溴苯酚开始已经实现了标题酪氨酸相关的新氨基酸3的两个C-3异构体的立体合成。
Regioselectivity in the ene reaction of singlet oxygen with ortho-prenylphenol derivatives
The ene reaction of singletoxygen with prenylated dihydroxyacetophenones led to the 2-hydroperoxy-3-methylbut-3-enyl derivatives as the major product. This original regioselectivity outlined a new effect, in competition with the previously established large group non-bonding effect. The oxidation products distribution could be explained by a stabilising interaction between the phenolic hydrogen, ortho
Synthesis of phenolic natural products using palladium catalyzed coupling reactions
作者:Roderick W. Bates、Christine J. Gabel、Jianhua Ji、Thota Rama-Devi
DOI:10.1016/0040-4020(95)00441-a
日期:1995.7
Derivatives of 2,4-diiodophenol are shown to undergo palladium catalyzed carbonylation and alkyne coupling reactions in excellent to moderate yield and high regioselectivity. The scope of these reactions is explored. Palladium catalyzed reactions are employed as the key steps in the synthesis of three phenolic natural products: Plicatin B, Drupanin and Eutypine.
Intramolecular oxyselenenylation and deselenenylation reactions in water, conducted by employing polymer-supported arylselenenyl bromide
After immobilizing arylselenenyl bromide on polymer resin, the oxyselenenylation reaction of olefin was carried out in water. An amphiphilic polymer-supported arylselenenyl bromide was employed, and various intramolecular oxyselenenylation and deselenenylation reactions proceeded smoothly in water in fair chemical yields (up to an 83% yield). (C) 2003 Elsevier Science Ltd. All rights reserved.