@article{cdd7100633f84dec9af7a626ee477bfa,
title = "Formation of Enamines via Catalytic Dehydrogenation by Pincer-Iridium Complexes",
abstract = "Di-isopropylphosphino-substituted pincer-ligated iridium catalysts are found to be significantly more effective for the dehydrogenation of simple tertiary amines to give enamines than the previously reported di-t-butylphosphino-substituted species. It is also found that the di-isopropylphosphino-substituted complexes catalyze dehydrogenation of several β-functionalized tertiary amines to give the corresponding 1,2-difunctionalized olefins. The di-t-butylphosphino-substituted species are ineffective for such substrates; presumably, the marked difference is attributable to the lesser crowding of the di-isopropylphosphino-substituted catalysts. Experimentally determined kinetic isotope effects in conjunction with DFT-based analysis support a dehydrogenation mechanism involving initial pre-equilibrium oxidative addition of the amine α-C-H bond followed by rate-determining elimination of the β-C-H bond.",
author = "Lu, {Yansong J.} and Xiawei Zhang and Santanu Malakar and Karsten Krogh-Jespersen and Faraj Hasanayn and Goldman, {Alan S.}",
note = "Funding Information: We thank Zhuo Gao, Drs. Amlan Ray, Sabuj Kundu and Ritu Ahuja for generously providing samples of various catalysts. We gratefully acknowledge support by the National Science Foundation through grant CHE-1465203. The authors acknowledge the Office of Advanced Research Computing at Rutgers, The State University of New Jersey for providing access to the Amarel cluster and associated research computing resources. Funding Information: We thank Zhuo Gao, Drs. Amlan Ray, Sabuj Kundu, and Ritu Ahuja for generously providing samples of various catalysts. We gratefully acknowledge support by the National Science Foundation through grant CHE-1465203. The authors acknowledge the Office of Advanced Research Computing at Rutgers, The State University of New Jersey for providing access to the Amarel cluster and associated research computing resources. Publisher Copyright: Copyright {\textcopyright} 2020 American Chemical Society.",
year = "2020",
month = mar,
day = "6",
doi = "10.1021/acs.joc.9b02846",
language = "English (US)",
volume = "85",
pages = "3020--3028",
journal = "Journal of Organic Chemistry",
issn = "0022-3263",
publisher = "American Chemical Society",
number = "5",
}