User profiles for Ryan A. Altman

Ryan Altman

Purdue University
Verified email at purdue.edu
Cited by 3352

Monodentate Phosphines Provide Highly Active Catalysts for Pd‐Catalyzed C N Bond‐Forming Reactions of Heteroaromatic Halides/Amines and (H) N …

…, RE Tundel, T Ikawa, RA Altman… - Angewandte Chemie …, 2006 - Wiley Online Library
Despite advances in the scope of palladium-catalyzed CÀN bond-forming reactions through
the development of more active catalysts,[1, 2] limitations to the method still remain: 1) In …

Copper-catalyzed N-arylation of imidazoles and benzimidazoles

RA Altman, ED Koval, SL Buchwald - The Journal of organic …, 2007 - ACS Publications
4,7-Dimethoxy-1,10-phenanthroline (L1c) was found to be an efficient ligand for the copper-catalyzed
N-arylation of imidazoles and benzimidazoles with both aryl iodides and bromides …

4,7-Dimethoxy-1,10-phenanthroline:  An Excellent Ligand for the Cu-Catalyzed N-Arylation of Imidazoles

RA Altman, SL Buchwald - Organic letters, 2006 - ACS Publications
4,7-Dimethoxy-1,10-phenanthroline (L) was found to be an efficient ligand for the copper-catalyzed
N-arylation of imidazole with aryl iodides and bromides under mild conditions. A …

An improved Cu-based catalyst system for the reactions of alcohols with aryl halides

RA Altman, A Shafir, A Choi, PA Lichtor… - The Journal of …, 2008 - ACS Publications
The use of 3,4,7,8-tetramethyl-1,10-phenanthroline (Me 4 Phen) as a ligand improves the
Cu-catalyzed cross-coupling reactions of aryl iodides and bromides with primary and …

Palladium-catalyzed enantioselective α-arylation and α-vinylation of oxindoles facilitated by an axially chiral P-stereogenic ligand

AM Taylor, RA Altman, SL Buchwald - Journal of the American …, 2009 - ACS Publications
The enantioselective α-arylation and α-vinylation of oxindoles catalyzed by Pd and a
biarylmonophosphine ligand with both axial and phosphorus-based chirogenicity is reported. The …

Orthogonal Pd-and Cu-based catalyst systems for C-and N-arylation of oxindoles

RA Altman, AM Hyde, X Huang… - Journal of the American …, 2008 - ACS Publications
In the cross-coupling reactions of unprotected oxindoles with aryl halides, Pd- and Cu-based
catalyst systems displayed orthogonal chemoselectivity. A Pd-dialkylbiarylphosphine-…

Recent Advances in Transition Metal‐Catalyzed Functionalization of gem‐Difluoroalkenes

S Koley, RA Altman - Israel journal of chemistry, 2020 - Wiley Online Library
gem‐Difluorinated alkenes are readily accessible building blocks that can undergo functionalization
to provide a broad spectrum of fluorinated and non‐fluorinated products. Herein, we …

Cu-Catalyzed N- and O-Arylation of 2-, 3-, and 4-Hydroxypyridines and Hydroxyquinolines

RA Altman, SL Buchwald - Organic letters, 2007 - ACS Publications
With use of Cu-based catalysts, 2- and 4-hydroxypyridines were N-arylated in modest to
excellent yields. In the case of 2-hydroxypyridine, the use of 4,7-dimethoxy-1,10-phenanthroline, …

Pd-catalyzed Suzuki–Miyaura reactions of aryl halides using bulky biarylmonophosphine ligands

RA Altman, SL Buchwald - Nature Protocols, 2007 - nature.com
The following protocol describes the application of a highly active Pd-based catalyst system
in the Suzuki–Miyaura cross-coupling reaction of arylboronic acids with aryl chlorides to …

Ligand‐Controlled Regiodivergent Palladium‐Catalyzed Decarboxylative Allylation Reaction to Access α, α‐Difluoroketones

MH Yang, DL Orsi, RA Altman - … Chemie International Edition, 2015 - Wiley Online Library
α,α‐Difluoroketones possess unique physicochemical properties that are useful for
developing therapeutics and probes for chemical biology. To access the α‐allyl‐α,α‐difluoroketone …