Palladium-Catalyzed Carbonylative Cross-Coupling Reaction
between Aryl(Heteroaryl) Iodides and Tricyclopropylbismuth:
Expedient Access to Aryl Cyclopropylketones
The carbonylative cross-coupling reaction between aryl and heteroaryl iodides and tricyclopropylbismuth is reported. The reaction is catalyzed by (SIPr)Pd(allyl)Cl, a NHC-palladium(II) catalyst, operates under 1 atm of carbon monoxide and tolerates a wide range of functional groups. The use of lithium chloride was found to provide higher yields of the desired aryl cyclopropylketones. The conditions
报道了芳基和杂芳基碘化物与三环丙基铋之间的羰基化交叉偶联反应。该反应由 (SIPr)Pd(烯丙基)Cl 催化,这是一种 NHC-钯 (II) 催化剂,在 1 个大气压的一氧化碳下运行,并能耐受多种官能团。发现使用氯化锂可提供更高产率的所需芳基环丙基酮。该条件也适用于碘代烯烃的羰基化交叉偶联,以提供相应的烯基环丙基酮。
Deprotection of Benzyl-Derived Groups via Uranyl-Photocatalysis
作者:Jiaolong Meng、Lei Ji、Xuefeng Jiang
DOI:10.1021/acs.organomet.4c00080
日期:——
To circumvent the hazards associated with flammable/explosive hydrogen and address substrate compatibility issues in reductive systems, we developed a mild method for benzyl deprotection facilitated by uranium under visible light irradiation at ambient conditions. The uranium-oxo species, as a metal-oxo-type photosensitizer, demonstrates compatibility with moisture, enabling benzyl C–H activation through
An efficient, high yield and one-pot synthesis of phenyl cyclopropyl methanones by reaction of different aryl alcohols with 4'-fluoro-4-chloro-butyrophenone in THF/DMF in the presence of NaH/TBAB is reported. Most of the methanones were further reduced to respective alcohols or methylenes. All the compounds were evaluated for their anti-tubercular activities against M. tuberculosis H37Rv in vitro displaying MICs ranging from 25 to 3.125 mu g/mL. The most active compounds showed activity against MDR strains and two of them (14 and 16) showed marginal enhancement of MST in mice. (c) 2005 Elsevier Ltd. All rights reserved.
Identification of dual role of piperazine-linked phenyl cyclopropyl methanone as positive allosteric modulator of 5-HT2C and negative allosteric modulator of 5-HT2B receptors
作者:Kartikey Singh、Chandan Sona、Vikash Ojha、Maninder Singh、Ankita Mishra、Ajeet Kumar、Mohammad Imran Siddiqi、Rama P. Tripathi、Prem N. Yadav
DOI:10.1016/j.ejmech.2018.12.070
日期:2019.2
discovery. Recent studies have shown that allosteric modulation of serotonin 2C receptor (5-HT2C) as a viable strategy for the treatment of various centralnervoussystem (CNS) disorders. Considering the critical role of 5-HT2C in the modulation of appetite, a selective positive allosteric modulator (PAM) of 5-HT2C offers a new opportunity for anti-obesity therapeutic development. In this study, phenyl cyclopropyl-linked
Identification of 1-[4-Benzyloxyphenyl)-but-3-enyl]-1<i>H</i>-azoles as New Class of Antitubercular and Antimicrobial Agents
作者:Namrata Anand、K. K. G. Ramakrishna、Munna P. Gupt、Vinita Chaturvedi、Shubhra Singh、Kishore K. Srivastava、Prapunjika Sharma、Niyati Rai、Ravishankar Ramachandran、A. K. Dwivedi、Varsha Gupta、Brijesh Kumar、Smriti Pandey、Praveen K. Shukla、Shailandra K. Pandey、Jawahar Lal、Rama Pati Tripathi
DOI:10.1021/ml4002248
日期:2013.10.10
A series of 1-[(4-benzyloxyphenyl)-but-3-enyl]-1H-azoles has been identified as potent antitubercular agents against Mycobacterium tuberculosis. Synthesis of compounds involved acid catalyzed ring-opening of cyclopropyl ring of phenyl cyclopropyl methanols followed by nucleophilic attack of the azoles on the carbocation intermediates. Several of the compounds 26, 34, and 36 exhibited significant antitubercular