Stereoselective Synthesis of (E)-4-Alkylidenecyclopent-2-en-1-ones by a Tandem Ring Closure−Michael Addition−Elimination
摘要:
[GRAPHICS]Reaction of (Z)-1,4-diketones with various functionalized nitroalkanes in the presence of DBU gives 4-alkylidenecyclopent-2-en-1-ones with E selectivity, A cyclopentadienone intermediate is probably formed by intramolecular aldol condensation, and this reacts with a nitroalkane giving a Michael addition-elimination.
Fused heterocyclic succinimide compounds and analogs thereof, modulators of nuclear hormone receptor function
申请人:——
公开号:US20040077605A1
公开(公告)日:2004-04-22
Fused cyclic compounds, methods of using such compounds in the treatment of nuclear hormone receptor-associated conditions such as cancer and immune disorders, and pharmaceutical compositions containing such compounds.
METHOD FOR THE PREPARATION OF FUSED HETEROCYCLIC SUCCINIMIDE COMPOUNDS AND ANALOGS THEREOF
申请人:Salvati E. Mark
公开号:US20050119228A1
公开(公告)日:2005-06-02
Fused cyclic compounds, methods of using such compounds in the treatment of nuclear hormone receptor-associated conditions such as cancer and immune disorders, and pharmaceutical compositions containing such compounds.
An expedient route to substituted furans via olefin cross-metathesis
作者:Timothy J. Donohoe、John F. Bower
DOI:10.1073/pnas.0913466107
日期:2010.2.23
of highly substituted derivatives are essential to medicinal chemistry. Here we show that the olefin CM reaction, in combination with an acid cocatalyst or subsequent Heck arylation, provides a concise and flexible entry to 2,5-di- or 2,3,5-tri-substituted furans. These cascade processes portend further opportunities for the regiocontrolled preparation of other highly substituted aromatic and heteroaromatic
烯烃交叉复分解 (CM) 反应广泛用于有机化学,是选择性合成差异取代烯烃产物的有效方法。令人惊讶的是,尚未报道将这一非凡的过程整合到芳香族和杂芳香族构建策略中的努力。这种结构代表了大多数小分子药物化合物的关键要素;高度取代衍生物的受控制备方法对于药物化学是必不可少的。在这里,我们展示了烯烃 CM 反应与酸助催化剂或随后的 Heck 芳基化相结合,为 2,5-二-或 2,3,5-三-取代呋喃提供了简洁而灵活的入口。
Gold-Catalyzed Etherification and Friedel−Crafts Alkylation Using <i>ortho-</i>Alkynylbenzoic Acid Alkyl Ester as an Efficient Alkylating Agent
A gold-catalyzed alkylation of alcohols and aromatic compounds is described. The reaction of ortho-alkynylbenzoic acid alkyl esters with alcohols or aromatic compounds occurs in the presence of catalytic amounts of Ph3PAuCl and AgOTf under mild conditions to produce corresponding ethers or Friedel-Crafts alkylation products in good to high yields. The reaction likely proceeds through the gold-induced
A highly efficient one‐pot transformation of readily accessible furans into 4‐hydroxy‐2‐cyclopentenones in H2O, using singlet oxygen as oxidant, has been developed.