7484-37-9Relevant articles and documents
Dirhodium(II)-Mediated Alkene Epoxidation with Iodine(III) Oxidants
Nasrallah, Ali,Grelier, Gwendal,Lapuh, Maria Ivana,Duran, Fernando J.,Darses, Benjamin,Dauban, Philippe
supporting information, p. 5836 - 5842 (2018/11/24)
Dirhodium(II) complexes and iodine(III) oxidants have found useful applications in synthetic nitrene chemistry. In this study, the combination of the dirhodium(II) complex Rh2(tpa)4 (tpa = triphenylacetate) with the iodine(III) oxidant PhI(OPiv)2 is shown to promote the epoxidation of alkenes in the presence of 2 equivalents of water. The reaction can be applied to diversely substituted alkenes and the corresponding epoxides are isolated with yields of up to 90 %. A possible mechanism involves the dirhodium(II) complex as a Lewis acid species that would tune the oxidizing character of the iodine(III) reagent.
Concise synthesis and structure-activity relationship of furospinosulin-1, a hypoxia-selective growth inhibitor from marine sponge
Kotoku, Naoyuki,Fujioka, Shinichi,Nakata, Chiaki,Yamada, Masaki,Sumii, Yuji,Kawachi, Takashi,Arai, Masayoshi,Kobayashi, Motomasa
supporting information; experimental part, p. 6673 - 6678 (2011/09/30)
Structure-activity relationship of furospinosulin-1 (1), a hypoxia-selective growth inhibitor isolated from marine sponge, was investigated. Concise synthetic method of 1 was developed, and some structurally modified analogues were prepared. Biological evaluation of them revealed that the whole chemical structure was important for the hypoxia-selective growth inhibitory activity of 1. Among prepared, the desmethyl analogue 30 showed excellent hypoxia-selective inhibitory activity similar to that of 1 and also exhibited in vivo anti-tumor activity with oral administration.
Iridium catalysts with bicyclic pyridine-phosphinite ligands: Asymmetric hydrogenation of olefins and furan derivatives
Kaiser, Stefan,Smidt, Sebastian P.,Pfaltz, Andreas
, p. 5194 - 5197 (2007/10/03)
(Chemical Equation Presented) Superior bicyclics: Iridium catalysts as 1 derived from pyridine-phosphinite ligands considerably extend the scope of asymmetric hydrogenation. In addition to various unfunctionalized and functionalized olefins, furans, and benzofurans, for which no catalysts were known before, are also hydrogenated with high enantioselectivity (see scheme).