@article {49291,
	title = {Depolymerization of waste polyethylene to linear alkenes via sequential dehydrogenation and metathesis},
	journal = {Green Chemistry},
	volume = {26},
	year = {2024},
	month = {OCT},
	pages = {10558-10566},
	type = {Article},
	abstract = {<p>
	Polyethylene (PE) is the most abundantly sourced plastic and significant efforts are needed for its end-of-life management. The deconstruction of PE is an uphill task and requires the breaking of highly stable C-C bonds. Here we demonstrate that PE can be deconstructed to value-added dodecene, along with other long-chain alkenes. The PCP-iridium complex catalyzes the dehydrogenation of commercial and post-consumer polyethylene waste to produce dehydrogenated polyethylene (DHP) with 0.5-1.0\% unsaturation. The DHP was subjected to an ethylene cross-metathesis reaction in the presence of suitable catalysts. Through meticulous optimization of reaction parameters, 63\% selectivity toward dodecene, with 26\% overall yield, was achieved. The practical significance of our method has been demonstrated by subjecting post-consumer plastic waste to dehydrogenation followed by ethylene metathesis to produce dodecene as a major product, together with long-chain alkenes. The PE deconstruction has been confirmed by recording molar mass before and after depolymerization using high-temperature gel permeation chromatography. The existence of dodecene has been unambiguously ascertained using GC, GC-MS, NMR, and IR spectroscopy. Thus, these results demonstrate the conversion of waste PE to value-added dodecene and long-chain alkenes under mild reaction conditions.</p>
},
	issn = {1463-9262},
	doi = {10.1039/d4gc03646h},
	author = {Khopade, Kishor V. and Rajput, Nikhita S. and Rangappa, Raghavendrakumar and Barsu, Nagaraju and Chikkali, Samir H.}
}
@article {49782,
	title = {Direct synthesis of phosphine-phosphite ligand and its implication in asymmetric hydrogenation of functionalized olefins},
	journal = {Chemistryselect},
	volume = {11},
	year = {2026},
	month = {FEB },
	pages = {e07548},
	type = {Article},
	abstract = {<p>
	Phosphine-phosphite (P-OP) ligands constitute a privileged class of chiral ligands in asymmetric catalysis owing to their modular structures and tunable steric and electronic properties. Herein, we report a direct, one-pot, synthesis of a new flexible P-OP ligand (L) derived from BINOL-PCl and its in situ complexation with rhodium (Rh) for catalytic evaluation. The resulting Rh/L system efficiently hydrogenates a diverse library of 19 functionalized olefins under mild conditions, delivering moderate to excellent enantioselectivities, with ee values reaching up to 99\%. Several of the hydrogenated products correspond to valuable chiral building blocks relevant to pharmaceutical synthesis, underscoring the practical utility of flexible P-OP ligand architectures in asymmetric hydrogenation.</p>
},
	keywords = {asymmetric hydrogenation, functionalized alkene, ligand design, metal catalyzed, phosphine-phosphite},
	issn = {2365-6549},
	doi = {10.1002/slct.202507548},
	author = {Chandanshive, Amol C. and Khopade, Kishor V. and Chikkali, Samir H.}
}
