Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 97739-46-3, is researched, SMILESS is CC1(C2)OC(C3)(C)OC2(C)OC3(C)P1C4=CC=CC=C4, Molecular C16H21O3PJournal, Organometallics called Titanium Complexes of Sterically Demanding Cage-Phosphinimide Ligands, Author is Carraz, Charles-Antoine; Stephan, Douglas W., the main research direction is titanium complex sterically demanding cage silyl phosphinimide preparation catalyst; crystal mol structure sterically demanding cage silylphosphinimide titanium complex; ethylene polymerization catalyst cage silylphosphinimide titanium complex preparation.Formula: C16H21O3P.
The known ligand PPh(C6H4O3Me4) (1) and its analog PCy(C6H4O3Me4) (2) have been prepared In the latter synthesis the diphosphine species (PCy)2(C6H2O3Me4) (3) was also isolated as a minor product. Reaction of the cage phosphines 1 and 2 with Me3SiN3 effected oxidation to the corresponding (trimethylsilyl)phosphinimines Me3SiNPR(C6H4O3Me4) (R = Ph (4), Cy (5)). Subsequent reactions afforded the titanium complexes CpTiCl2(NPR(C6H4O3Me4)) (R = Ph (6), Cy (7)) and CpTiMe2(NPR(C6H4O3Me4)) (R = Ph (8), Cy (9)). Preliminary screening for catalytic activity in ethylene polymerization employing either methylalumoxane (MAO) or [Ph3C][B(C6F5)4] as the activator showed minimal catalytic activity. These observations were probed via reactions of these complexes with AlMe3, MAO, or [Ph3C][B(C6F5)4]. Reaction of 8 with AlMe3 gave several products, one of which was fully characterized as the cage-rupture product CpTiMe2(NPCy(C6H4O3Me5)(μ-AlMe2)(AlMe3)) (10). A similar product is inferred by the spectroscopic monitoring of the reaction of 8 with MAO. In contrast, reaction of 2 with AlMe3 resulted only in the formation of the adduct Me3AlPCy(C6H4O3Me4) (11). Structural data are reported for 2, 3, 8, 10, and 11.
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Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics