Accessing pyrrolones and pyridinones: controlling 5-exo and 6-endo ring closures in heterocyclic alkynylamides
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DOI: 10.1139/cjc-2016-0524
Abstract: Competitive 5-exo and 6-endo anionic intramolecular cyclization reactions in heterocyclic alkynylamides were explored via experimental and computational analysis. The 5-exo-dig cyclization pathway is usually disfavoured in heterocyclic systems, and 6-endo products are often both the… read more here.
Keywords: dig; endo; exo endo; accessing pyrrolones ... See more keywords
Group 6 metal carbonyl complexes of cyclo-(P5Ph5)
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DOI: 10.1515/pac-2018-0905
Abstract: Abstract Group 6 metal (Cr, Mo, W) carbonyl complexes react with cyclo-(P5Ph5) to afford the phosphorus-rich complexes [Cr(CO)5{cyclo-(P5Ph5)-κP1}] (1), [{Cr(CO)5}2{μ-cyclo-(P5Ph5)-κP1,P3}] (2), [M(CO)4{cyclo-(P5Ph5)-κP1,P3}] (with M=Cr (3), Mo (4), W (exo-5, endo-5)) depending on the reaction conditions.… read more here.
Keywords: exo endo; complexes cyclo; group metal; carbonyl complexes ... See more keywords