Iron-Catalyzed C-Allylating Partial Dearomatization of Naphthols
摘要:
The iron complex Bu4N[Fe(CO)(3)(NO)](TBA[Fe]) catalyzes the intermolecular allylation of naphthol derivatives to give the corresponding partially dearomatized allylated chromenones in good to excellent yields. The scope and limitations are reported. An efficient decarboxylative intramolecular C- allylation, starting from allyl naphthyl carbonates, was developed. From a mechanistic point of view, the overall process is the result of a fast O- allylation followed by a sigmatropic rearrangement to the desired product.
The first visible‐light‐promoted dearomative fluoroalkylation of β‐naphthols was realized without the assistance of any transition‐metal catalysts or external photosensitizers. Inexpensive fluoroalkyl iodides were directly used as efficient fluoroalkylation reagents under very mild reaction conditions. The scope of this process was found to be general and broad, and both trifluoromethyl and perfluoroalkyl
在没有任何过渡金属催化剂或外部光敏剂的帮助下,实现了第一个由可见光促进的β-萘酚脱芳基氟烷基化反应。廉价的氟代烷基碘化物在非常温和的反应条件下直接用作有效的氟代烷基化试剂。发现该方法的范围是一般性的,范围很广,三氟甲基和全氟烷基(-C 4 F 9,-C 6 F 13和-C 8 F 17)以极高的收益进行安装。初步的机理研究表明,在无光催化剂的情况下,萘甲酸酯-氟代烷基碘的电子供体-受体(EDA)复合物中可见光促进了分子间的电荷转移。
Regioselective Oxidative Chlorination of Arenols Using NaCl and Oxone
作者:Muhammet Uyanik、Naoto Sahara、Kazuaki Ishihara
DOI:10.1002/ejoc.201801063
日期:2019.1.10
A practical and efficient chlorination of naphthols and phenols was developed using transient chlorinating species generated in situ from inexpensive sodium chloride and Oxone as a Cl source and oxidant, respectively, under mild conditions.
[EN] PYRIMIDINE DERIVATIVES AS PGE2 RECEPTOR MODULATORS<br/>[FR] DÉRIVÉS DE PYRIMIDINE UTILISÉS EN TANT QUE MODULATEURS DES RÉCEPTEURS DES PGE2
申请人:IDORSIA PHARMACEUTICALS LTD
公开号:WO2018210988A1
公开(公告)日:2018-11-22
The present invention relates to pyrimidine derivatives of formula (I) wherein (R1)n, R3, R4a, R4b, R5a, R5b and Ar1 are as described in the description and their use in the treatment of cancer by modulating an immune response comprising a reactivation of the immune system in the tumor. The invention further relates to novel benzofurane and benzothiophene derivatives of formula (II) and their use as pharmaceuticals, to their preparation, to pharmaceutically acceptable salts thereof, and to their use as pharmaceuticals, to pharmaceutical compositions containing one or more compounds of formula (I), and especially to their use as modulators of the prostaglandin 2 receptors EP2 and/or EP4.
Iridium-Catalyzed Intermolecular Asymmetric Dearomatization of β-Naphthols with Allyl Alcohols or Allyl Ethers
作者:Hang-Fei Tu、Chao Zheng、Ren-Qi Xu、Xi-Jia Liu、Shu-Li You
DOI:10.1002/anie.201609654
日期:2017.3.13
An Ir‐catalyzed intermolecular asymmetric dearomatization reaction of β‐naphthols with allyl alcohols or allyl ethers was developed. When an iridium catalyst generated from [Ir(COD)Cl]2 (COD=cyclooctadiene) and a chiral P/olefin ligand is employed, highly functionalized β‐naphthalenone compounds bearing an all‐carbon‐substitutedquaternary chiral center were obtained in up to 92 % yield and 98 % ee
Rhodium-Catalyzed Asymmetric Allylic Dearomatization of β-Naphthols: Enantioselective Control of Prochiral Nucleophiles
作者:Sheng-Biao Tang、Hang-Fei Tu、Xiao Zhang、Shu-Li You
DOI:10.1021/acs.orglett.9b02285
日期:2019.8.2
A highlyenantioselective rhodium-catalyzed allylic dearomatization of β-naphthols with racemic aryl vinyl carbinol is described. In the presence of a Rh-catalyst derived from [Rh(C2H4)Cl]2 and chiral (P, olefin)-ligand with TFA as an additive, the functionalized β-naphthalenone compounds bearing an all-carbon-substituted quaternary stereogenic center were obtained in good yields with excellent enantioselectivity
描述了具有外消旋芳基乙烯基甲醇的β-萘酚的高度对映体选择性的铑催化的烯丙基脱芳香化反应。在衍生自[Rh(C 2 H 4)Cl] 2和手性(P,烯烃)-配体并以TFA为添加剂的Rh催化剂存在下,带有全碳取代季铵盐的官能化β-萘酮化合物以良好的产率和优异的对映选择性获得了立体异构中心。此外,该协议的特点是对手性亲核试剂的对映选择性控制,并提供了Rh催化的不对称烯丙基脱芳香化的第一个例证。