Directed Remote Lateral Metalation: Highly Substituted 2-Naphthols and BINOLs by In Situ Generation of a Directing Group
作者:Jignesh J. Patel、Marju Laars、Wei Gan、Johnathan Board、Matthew O. Kitching、Victor Snieckus
DOI:10.1002/anie.201805203
日期:2018.7.20
general synthesis of highly substituted 2‐naphthols based on a new carbanionic reaction sequence is demonstrated. The reaction exploits the dual nature of lithium bases consisting of consecutive ring opening of readily available coumarins with either LiNEt2 or LiNiPr2 into Z‐cinnamamides, thus generating a directinggroup in situ and allowing, by conformational freedom, a lateral directed remote metalation
演示了基于新的碳负离子反应序列的高度取代的2-萘酚的一般合成。该反应利用了锂碱的双重性质,即将容易获得的具有LiNEt 2或LiN i Pr 2的香豆素连续开环成Z肉桂酰胺,从而在原位生成一个导向基团,并通过构象自由度允许横向定向的远程金属化以进行闭环反应,得到芳基2-萘酚,收率好至极好。可以将这些转换组合起来,以提供更有效的单锅法。对远端横向金属化步骤的机械洞察力,证明了对Z的要求描述了肉桂酰胺。还报道了该方法在高度取代的3,3'-二芳基BINOL配体合成中的应用。
Formylation of Electron-Rich Aromatic Rings Mediated by Dichloromethyl Methyl Ether and TiCl4: Scope and Limitations
作者:Iván Ramos-Tomillero、Marta Paradís-Bas、Ibério de Pinho Ribeiro Moreira、Josep Bofill、Ernesto Nicolás、Fernando Albericio
DOI:10.3390/molecules20045409
日期:——
Here the aromatic formylation mediated by TiCl4 and dichloromethyl methyl ether previously described by our group has been explored for a wide range of aromatic rings, including phenols, methoxy- and methylbenzenes, as an excellent way to produce aromatic aldehydes. Here we determine that the regioselectivity of this process is highly promoted by the coordination between the atoms present in the aromatic moiety and those in the metal core.
A Direct and Mild Formylation Method for Substituted Benzenes Utilizing Dichloromethyl Methyl Ether–Silver Trifluoromethanesulfonate
作者:Kosuke Ohsawa、Masahito Yoshida、Takayuki Doi
DOI:10.1021/jo400056k
日期:2013.4.5
A silver trifluoromethanesulfonate (AgOTf)-promoted direct and mild formylation of benzenes has been developed. The reaction utilizing dichloromethylmethylether (Cl2CHOMe) and AgOTf powerfully formylated various substituted benzenes under temperature conditions as low as −78 °C without losing the protecting groups on the phenolic hydroxyl group.
De Novo Design, Synthesis, and Evaluation of Novel Nonsteroidal Phenanthrene Ligands for the Estrogen Receptor
作者:Jonathan M. Schmidt、Julie Mercure、Gilles B. Tremblay、Martine Pagé、Aida Kalbakji、Miklos Feher、Robert Dunn-Dufault、Markus G. Peter、Peter R. Redden
DOI:10.1021/jm020536q
日期:2003.4.1
improved tissue selectivity profiles compared with tamoxifen, optimal tissue selectivity has not yet been demonstrated. As such there is still a need for additional diversity and new chemicalscaffolds to allow for exploration of improved tissue selectivity. Here, we describe the discovery of a novel phenanthrene scaffold for estrogen receptor ligands utilizing a ligand based denovodesign approach. The
The invention relates to novel compounds of the formula (I)
in which X, Y, Z, A, B and G have the meanings given above,
to a plurality of processes and intermediates for their preparation and to their use as pesticides and/or herbicides.
Moreover, the invention relates to selective herbicidal compositions comprising, firstly, the phenyl-substituted bicyclooctane-1,3-dione derivates 33 and, secondly, a crop plant compatibility-improving compound.
The present invention furthermore relates to increasing the activity of crop protection compositions comprising in particular phenyl-substituted bicyclooctane-1,3-dione derivates by adding ammonium salts or phosphonium salts and, if appropriate, penetrants, to the corresponding compositions, to processes for their preparation and to their use in crop protection as insecticides and/or acaricides and/or for preventing unwanted plant growth.