Synthesis of the Water Soluble Ligands dmPTA and dmoPTA and the Complex [RuClCp(HdmoPTA)(PPh₃)](OSO₂CF₃) (dmPTA = N,N‘-Dimethyl-1,3,5-triaza-7-phosphaadamantane, dmoPTA = 3,7-Dimethyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane, HdmoPTA = 3,7-H-3,7-Dimethyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane)

Abstract

The new water-soluble ligand dmPTA(OSO(2)CF(3))(2) (1) (dmPTA = N,N'-dimethyl-1,3,5-triaza-7-phosphaadamantane) has been synthesized by reaction of PTA with MeOSO(2)CF(3) in acetone (PTA = 1,3,5-triaza-7-phosphatricycle[3.3.1.1(3,7)]decane). The reaction of 1 with KOH gave rise to the new water-soluble ligand dmoPTA (3) (dmoPTA = 3,7-dimethyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane) by elimination of the -CH(2)- group located between both NCH(3) units. Compound dmPTA(BF(4))(2) (2) and complex [RuClCp(HdmoPTA)(PPh(3))](OSO(2)CF(3)) (4) have also been synthesized, while compounds HdmoPTA(BF(4)) (3a) and [RuClCp(dmPTA)(PPh(3))](OSO(2)CF(3)) (5) were characterized but not isolated. The new ligands and the complex have been fully characterized by NMR, IR, elemental analysis, and X-ray crystal structure determination (ligand 1 and complex 4). The synthetic processes for 3 and 4 were studied.

Synthesis and structural characterization of copper(I) complexes bearing N-methyl-1,3,5-triaza-7-phosphaadamantane (mPTA)

“…The water-soluble 1,3,5-triaza-7-phosphaadamantane (PTA) phosphine ligand and its derivatives are receiving growing attention in recent years [15][16][17]. The good water solubility of related transition metal PTA complexes makes possible their efficient application in aqueous phase catalysis [18][19][20].…”

“…[28]. The ligands PTA, (mPTA)I and (mPTA)(CF 3 SO 3 ) were synthesized in accordance with published methods [16,17]. Elemental analyses were performed on a Carlo Erba 1106 Elemental Analyzer .…”

Synthesis and solid state structure of Co(II) complexes of OPTA

“…For 35 years, it has been thought that PTA binds metals only through phosphorus. In recent years the number of papers describing the coordination chemistry of PTA [3][4][5][6][7][8] and derivatives [9][10][11][12][13][14][15][16][17] has increased dramatically. The first report of a nitrogen bound PTA metal complex appeared in late 2005; nitrogen coordination to silver was observed only after metal coordination of the phosphorus atom to ruthenium [18].…”

Evaluation of catalytic activity of [RuClCp(dmoPTA)(PPh3)](OSO2CF3) in the isomerization of allylic alcohols in water (dmoPTA=3,7-dimethyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane)

“…Under argon the isomerization was not complete in the checked reaction time but under air complex 1 was able to fully isomerize 1-octen-3-ol in 3 h. Isomerization of 1-octen-3-ol was also studied under Ar atmosphere in water-methanol mixtures in which complex 1 and the substrate are both soluble [10].…”