Bioorganic Chemistry

Dugas, Hermann

doi:10.1007/978-1-4612-2426-6

Cited by 119 publications

(59 citation statements)

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“…[2c] Therefore, in aqueous media, guanidines exist almost exclusively in the protonated form. [3] Guanidines are currently attracting attention as anion receptors, [4] both in enzymes and in model systems. Due to their hydrophilic nature, they also play an important role in the mediation of solubility of natural products [5] and in the stabilization of protein conformations through hydrogen bonding.…”

Section: Introductionmentioning

confidence: 99%

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Complexes of Manganese, Iron, Zinc, and Molybdenum with a Superbasic Tris(guanidine) Derivative of Tris(2-ethylamino)amine (Tren) as a Tripod Ligand

Wittmann

Raab

Schorm

et al. 2001

Eur. J. Inorg. Chem.

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Keywords: Ligand design / N ligands / Tripodal ligands / Coordination chemistry / Manganese / Iron / Zinc / MolybdenumThe synthesis of the novel tripod ligand N[CH 2 CH 2 N= C(NMe 2 ) 2 ] 3 , based on the tris(2-ethylamino)amine (tren) backbone and having a set of three superbasic tetramethylguanidine (TMG) donor atoms instead of the primary amine functionalities, is described. This ligand has been prepared by treating tren with the Vilsmeyer salt [(Me 2 N) 2 CCl]Cl in

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Section: Introductionmentioning

confidence: 99%

“…The general procedure was followed using [Mo(CH 3 CN)3 (CO) 3 ] (0.42 g, 1.40 mmol) and 1 (0.88 g, 2.00 mmol). Yield 0.69 g (1.11 mmol, 79%) as a yellow powder.…”

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confidence: 99%

Complexes of Manganese, Iron, Zinc, and Molybdenum with a Superbasic Tris(guanidine) Derivative of Tris(2-ethylamino)amine (Tren) as a Tripod Ligand

Wittmann

Raab

Schorm

et al. 2001

Eur. J. Inorg. Chem.

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“…This could be explained by the ionization of imidazole group at different pH conditions. An imidazole group (pK a = 6.5 -7.0) is known to undergo such equilibrium as follows 21 : Therefore, at low pH, the positively ionized form of imidazole has no nucleophilic activity. The neutral form and negatively ionized form has almost the same nucleophilic activity.…”

Section: Resultsmentioning

confidence: 99%

Molecularly imprinted polymers having amidine and imidazole functional groups as an enzyme-mimetic catalyst for ester hydrolysis

et al. 2002

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A molecularly imprinted polymer (MIP) having both amidine and imidazole functional groups in the active site has been prepared using p-nitrophenyl phosphate as a transition state analogue (TSA). The imprinted polymer MIP with amidine and imidazole found to have the highest hydrolysis activity compared with other MIPs with either amidine or imidazole groups only. It is postulated a cooperative effect between amidine and imidazole in the hydrolysis of p-nitrophenyl methyl carbonate (NPMC) as a substrate when both groups were arranged in proximity by molecular imprinting. The rate enhancement of the hydrolysis by MIP was 60 folds over the uncatalyzed solution reaction and two folds compared with the control non-imprinted polymer CP1 having both functional groups. The enzyme-mimetic catalytic hydrolysis of p-nitrophenyl acetate by MIP was evaluated in buffer at pH 7.0 with K m of 1.06 mM and k cat of 0.137 h -1 .

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“…16-ClO 4 reacted with triphenylphosphine at room temperature for 1 hour in CDCl 3 , whereas 17-ClO 4 was inert to the same reagent at room temperature for even 5 days in CDCl 3 . These results indicate that the electron-donating effect of the axial alkyl groups influences the stability of the starting hydroperoxides.…”

Section: Reactivity Of Phosphorus Arsenic and Antimony Porphyrin Pementioning

confidence: 98%

Synthesis and properties of group 15 element porphyrin peroxides

Satoh

Masumoto

Yamamoto

et al. 2001

Heteroatom Chemistry

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Bioorganic Chemistry

Cited by 119 publications

References 0 publications

Complexes of Manganese, Iron, Zinc, and Molybdenum with a Superbasic Tris(guanidine) Derivative of Tris(2-ethylamino)amine (Tren) as a Tripod Ligand

Complexes of Manganese, Iron, Zinc, and Molybdenum with a Superbasic Tris(guanidine) Derivative of Tris(2-ethylamino)amine (Tren) as a Tripod Ligand

Molecularly imprinted polymers having amidine and imidazole functional groups as an enzyme-mimetic catalyst for ester hydrolysis

Synthesis and properties of group 15 element porphyrin peroxides

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