Synthesis of amino acid esters of the ruthenium naphthalene complex [(C5Me4CH2OH)Ru(C10H8)]+
摘要:
Ruthenium naphthalene complex [(C5Me4CH2OH)Ru(C10H8)](+) (2) with hydroxy-substituted cyclopentadienyl ligand reacts with N-Boc-protected alanine, methionine, phenylalanine, and tryptophan in the presence of dicyclohexylcarbodiimide giving organometallic esters of amino acids [(C5Me4CH2-OOCCH(CH2R)NHBoc)Ru(C10H8)](+) (3a-d) in 70-86% yields. Irradiation of phenylalanine derivative 3c at 365 nm results in replacement of the naphthalene ligand by the phenyl group giving ansa-complex [(eta(5)-C5Me4)CH2OOCCH(CH2-eta(6)-Ph)NHBoc)Ru](+) (4) in 47% yield. Complexes [3c,d] BF4 containing phenylalanine and tryptophan residues effectively inhibit growth of cancer cell lines B16, MeWo, SCOV3, SKBR3, and A549 (IC50 = 21-96 mu M) with activity and selectivity being close to those of the cisplatin. The structure of the alanine derivative [3a]BPh4 was established by X-ray diffraction. (C) 2013 Elsevier B.V. All rights reserved.
Synthesis of amino acid esters of the ruthenium naphthalene complex [(C5Me4CH2OH)Ru(C10H8)]+
摘要:
Ruthenium naphthalene complex [(C5Me4CH2OH)Ru(C10H8)](+) (2) with hydroxy-substituted cyclopentadienyl ligand reacts with N-Boc-protected alanine, methionine, phenylalanine, and tryptophan in the presence of dicyclohexylcarbodiimide giving organometallic esters of amino acids [(C5Me4CH2-OOCCH(CH2R)NHBoc)Ru(C10H8)](+) (3a-d) in 70-86% yields. Irradiation of phenylalanine derivative 3c at 365 nm results in replacement of the naphthalene ligand by the phenyl group giving ansa-complex [(eta(5)-C5Me4)CH2OOCCH(CH2-eta(6)-Ph)NHBoc)Ru](+) (4) in 47% yield. Complexes [3c,d] BF4 containing phenylalanine and tryptophan residues effectively inhibit growth of cancer cell lines B16, MeWo, SCOV3, SKBR3, and A549 (IC50 = 21-96 mu M) with activity and selectivity being close to those of the cisplatin. The structure of the alanine derivative [3a]BPh4 was established by X-ray diffraction. (C) 2013 Elsevier B.V. All rights reserved.