Rhodium complex-catalyzed desilylative cyclocarbonylation of 1-aryl-2-(trimethylsilyl)acetylenes: a new route to 2,3-dihydro-1H-inden-1-ones
摘要:
Under water gas shift reaction conditions, 1-aryl-2-(trimethylsilyl)acetylenes undergo Rh-catalyzed desilylative cyclocarbonylation to give 2,3-dihydro-1H-inden-1-ones and trimethylsilanol. A wide variety of functional groups, such as methoxy, chloro, acetyl, ethoxycarbonyl, cyano, and trifluoromethyl, are tolerated on the aromatic ring under the reaction conditions. The products were obtained in good to excellent yield whether the substituent on the aromatic ring was electron-donating or electron-withdrawing. The cyclizations of substrates bearing a meta substituent on the aromatic ring regiospecifically gave 5-substituted-2,3-dihydro-1H-inden-1-ones except when the meta substituent was a methoxy group. The desilylative cyclocarbonylation is an alternative to the conventional preparation of 2,3-dihydro-1H-inden-1-ones, an intramolecular Friedel-Crafts acylation. A possible mechanism for the process is described.
A novel one-pot thermal cycloaddition of two indenones followed by a decarbonylation and dehydrogenation cascade afforded benzo[c]fluorenones regioselectively. Various substituted indenone derivatives were converted into their corresponding benzo[c]fluorenones in good to excellent yields.
新颖的一锅法将两个茚满进行热环加成,然后进行脱羰和脱氢级联反应,从而选择性地提供了苯并[ c ]芴酮。各种取代的茚满酮衍生物均以良好或优异的产率转化为相应的苯并[ c ]芴酮。
Intermolecular [5+2] Annulation between 1‐Indanones and Internal Alkynes by Rhodium‐Catalyzed C–C Activation
作者:Rui Zhang、Ying Xia、Guangbin Dong
DOI:10.1002/anie.202106007
日期:2021.9.6
Herein, we report a [5+2] cycloaddition between readily accessible 1-indanones and internal alkynes through Rh-catalyzed activation of less strained C−C bonds. The reaction is enabled by a strongly σ-donating NHC ligand and a carefully modified temporary directing group. A wide range of functional groups is tolerated, and the method provides straightforward access to diverse benzocycloheptenones that
[EN] HETEROBICYCLIC METALLOPROTEASE INHIBITORS<br/>[FR] INHIBITEURS DE METALLOPROTEASE HETEROBICYCLIQUE
申请人:ALANTOS PHARMACEUTICALS INC
公开号:WO2006128184A2
公开(公告)日:2006-11-30
[EN] The present invention relates generally to amide group containing pharmaceutical agents, and in particular, to amide containing heterobicyclic metalloprotease inhibitor compounds. More particularly, the present invention provides a new class of heterobicyclic MMP- 13 inhibiting compounds, that exhibit an increased potency in relation to currently known MMP- 13 inhibitors. [FR] La présente invention concerne d'une manière générale des agents pharmaceutiques contenant un groupe amide et, en particulier, des composés inhibiteurs de métalloprotéase hétérobicyclique contenant un amide. Cette invention concerne plus particulièrement une nouvelle classe de composés inhibiteurs MMP-13 hétérobicycliques qui présente une puissance améliorée par rapport aux inhibiteurs MMP- 13 connus jusqu'à présent.
The object of the present invention is to provide novel carboxamides which exhibit an excellent pesticidal activity as pesticides. Disclosed are the carboxamides represented by the following Formula (I) wherein each substituent is as defined in the specification, and use thereof as pesticides and animal parasite controling agents.
Suzuki–Miyaura Coupling of Simple Ketones via Activation of Unstrained Carbon–Carbon Bonds
作者:Ying Xia、Jianchun Wang、Guangbin Dong
DOI:10.1021/jacs.8b02462
日期:2018.4.25
Here, we describe that simple ketones can be efficiently employed as electrophiles in Suzuki-Miyauracoupling reactions via catalytic activation of unstrained C-C bonds. A range of common ketones, such as cyclopentanones, acetophenones, acetone and 1-indanones, could be directly coupled with various arylboronates in high site-selectivity, which offers a distinct entry to more functionalized aromatic
在这里,我们描述了通过催化激活无张力的 CC 键,简单的酮可以在 Suzuki-Miyaura 偶联反应中有效地用作亲电子试剂。一系列常见的酮,如环戊酮、苯乙酮、丙酮和1-茚满酮,可以直接与各种芳基硼酸酯以高位点选择性偶联,这为获得更多功能化的芳香酮提供了独特的途径。初步机理研究表明酮 α-CC 键通过氧化加成断裂。