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Palladium‐Catalyzed Insertion of Ethylene and 1,1‐Disubstituted Difunctional Olefins: An Experimental and Computational Study
Author(s) -
Gaikwad Shahaji R.,
Patel Ketan,
Deshmukh Satej S.,
Mote Nilesh R.,
Birajdar Rajkumar S.,
Pandole Satish P.,
Chugh Jeetender,
Chikkali Samir H.
Publication year - 2020
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.202000309
Subject(s) - ethylene , palladium , olefin fiber , insertion reaction , chemistry , polymerization , catalysis , migratory insertion , polymer chemistry , copolymer , yield (engineering) , polyethylene , organic chemistry , materials science , polymer , metallurgy
Insertion or coordination copolymerization of ethylene with di‐substituted olefins is challenging and the choice of di‐substituted mono‐functional olefin versus di‐substituted di‐functional olefin (DDO) appears to be decisive. Here we show that DDO‐inserted species are amenable to ethylene insertion and polymerization. DDOs such as 2‐acetamidoacrylic acid (AAA), methyl 2‐acetamidoacrylate (MAAA), and ethyl 2‐cyanoacrylate (ECA) were treated with palladium complex [{P∧O}PdMe(L)] (P∧O=κ 2 ‐P,O−Ar 2 PC 6 H 4 SO 2 O with Ar=2‐MeOC 6 H 4 ; L=C 2 H 6 OS) and the existence of respective insertion intermediates in moderate yield (up to 37 %) was established. These intermediates were exposed to ethylene and corresponding ethylene‐inserted products were isolated and characterized. A careful comparison with three model compounds confirmed ethylene insertion and polymerization. Thus, the combined experimental and computational investigations show that DDO‐inserted species can undergo ethylene insertion and polymerization.