479411-96-6Relevant articles and documents
Merging Iridium-Catalyzed C-H Borylations with Palladium-Catalyzed Cross-Couplings Using Triorganoindium Reagents
Jayasundara, Chathurika R. K.,Gil-Negrete, José M.,Montero Bastidas, Jose R.,Chhabra, Arzoo,Martínez, M. Montserrat,Pérez Sestelo, José,Smith, Milton R.,Maleczka, Robert E.
, p. 751 - 759 (2021/12/27)
A versatile and efficient method to prepare borylated arenes furnished with alkyl, alkenyl, alkynyl, aryl, and heteroaryl functional groups is developed by merging Ir-catalyzed C-H borylations (CHB) with a chemoselective palladium-catalyzed cross-coupling of triorganoindium reagents (Sarandeses-Sestelo coupling) with aryl halides bearing a boronic ester substituent. Using triorganoindium cross-coupling reactions to introduce unsaturated moieties enables the synthesis of borylated arenes that would be difficult to access through the direct application of the CHB methodology. The sequential double catalyzed procedure can be also performed in one vessel.
Understanding the Activation of Air-Stable Ir(COD)(Phen)Cl Precatalyst for C-H Borylation of Aromatics and Heteroaromatics
Slack, Eric D.,Colacot, Thomas J.
supporting information, p. 1561 - 1565 (2021/02/20)
A newly developed robust catalyst [Ir(COD)(Phen)Cl] (A) was used for the C-H borylation of three dozen aromatics and heteroaromatics with excellent yield and selectivity. Activation of the catalyst was identified by the use of catalytic amounts of water, alcohols, etc., when B2pin2 was used in noncoordinating solvents, while for THF catalytic use of HBpin was required. The results were on par with the in situ based expensive system [Ir(OMe)(COD)]2/dtbbpy or Me4Phen.
Harnessing C-H Borylation/Deborylation for Selective Deuteration, Synthesis of Boronate Esters, and Late Stage Functionalization
Kallepalli, Venkata A,Gore, Kristin A.,Shi, Feng,Sanchez, Luis,Chotana, Ghayoor A.,Miller, Susanne L.,Maleczka, Robert E.,Smith, Milton R.
, p. 8341 - 8353 (2015/09/02)
Ir-catalyzed deborylation can be used to selectively deuterate aromatic and heteroaromatic substrates. Combined with the selectivities of Ir-catalyzed C-H borylations, uniquely labeled compounds can be prepared. In addition, diborylation/deborylation reactions provide monoborylated regioisomers that complement those prepared by C-H borylation. Comparisons between Ir-catalyzed deborylations and Pd-catalyzed deborylations of diborylated indoles described by Movassaghi are made. The Ir-catalyzed process is more effective for deborylating aromatics and is generally more effective in the monodeborylation of diborylated thiophenes. These processes can be applied to complex molecules such as clopidogrel.
Double N,B-Type Bidentate Boryl Ligands Enabling a Highly Active Iridium Catalyst for C-H Borylation
Wang, Guanghui,Xu, Liang,Li, Pengfei
supporting information, p. 8058 - 8061 (2015/07/15)
Boryl ligands hold promise in catalysis due to their very high electron-donating property. In this communication double N,B-type boryl anions were designed as bidentate ligands to promote an sp2 C-H borylation reaction. A symmetric pyridine-con
ALKYNYL ALCOHOLS AND METHODS OF USE
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Page/Page column 301, (2015/03/13)
The invention relates to compounds of Formula (0): wherein Q, A1-A8, R4 and R5 and each has the meaning as described herein. Compounds of Formula (0) and pharmaceutical compositions thereof are useful in the treatment of diseases and disorders in which undesired or over- activation of NF-kB signaling is observed.
Rhodium(I)-catalyzed borylation of nitriles through the cleavage of carbon-cyano bonds
Tobisu, Mamoru,Kinuta, Hirotaka,Kita, Yusuke,Remond, Emmanuelle,Chatani, Naoto
supporting information; experimental part, p. 115 - 118 (2012/03/07)
The reaction of aryl cyanides with diboron in the presence of a rhodium/Xantphos catalyst and DABCO affords arylboronic esters via carbon-cyano bond cleavage. This unprecedented mode of reactivity for a borylrhodium species allows the regioselective intro
A one-pot, single-solvent process for tandem, catalyzed C-H borylation-Suzuki-Miyaura cross-coupling sequences
Harrisson, Peter,Morris, James,Steel, Patrick G.,Marder, Todd B.
experimental part, p. 147 - 150 (2009/05/30)
Methyl tert-butyl ether is a suitable solvent for iridium-catalyzed C-H borylation followed, in the same pot, by palladium-catalyzed Suzuki-Miyaura cross-coupling sequences, giving high yields of biaryls. Georg Thieme Verlag Stuttgart.
Room temperature borylation of arenes and heteroarenes using stoichiometric amounts of pinacolborane catalyzed by iridium complexes in an inert solvent
Ishiyama, Tatsuo,Nobuta, Yusuke,Hartwig, John F.,Miyaura, Norio
, p. 2924 - 2925 (2007/10/03)
Aromatic C-H borylation of arenes and heteroarenes using stoichiometric amounts of pinacolborane was catalyzed by an iridium complex generated from 1/2 [Ir(OMe)(COD)]2 and 4,4′-di-tert-butyl-2,2′-bipyridine at room temperature in hexane and aff
A stoichiometric aromatic C-H borylation catalyzed by iridium(I)/2,2′-bipyridine complexes at room temperature
Ishiyama, Tatsuo,Takagi, Jun,Hartwig, John F.,Miyaura, Norio
, p. 3056 - 3058 (2007/10/03)
Room-temperature C-H borylation using a stoichiometric amount of arenes and bis(pinacolato)diboron (pin2B2) is efficiently catalyzed by iridium(I) complexes generated from [{Ir(OMe)(cod)}2] (cod=1,5-cyclooctadiene) and 4,4′-di-tertbutyl-2,2′-bipyridine (dtbpy) in hexane, and provides the corresponding arylboronates in excellent yields [Eq. (1)].