نتایج جستجو برای: biomimetic synthesis

تعداد نتایج: 416494  

Journal: :Advanced drug delivery reviews 2004
Nicholas A Peppas Jennifer H Ward

In the preparation of biomimetic materials it is often required that efficient methods of polymerization be used, often methods that can lead to biomimetic polymers with relatively narrow molecular weight distribution. Living radical polymerization techniques have successfully been used to create low polydispersity linear polymers by free-radical polymerizations. Although this technique slows d...

2012
Nigel Ribeiro Mari Gotoh Yoichi Nakatani Laurent Désaubry

The polyprenoids, which represent the largest family of natural products in the living world, are biogenic compounds that derive from the assemblage and modification of fivecarbon isoprene units. Some polyprenoids, such as cholesterol in animals, phytosterols in plants or hopanoids and -dihydroxylated carotenoids in Bacteria (Fig. 1), are of paramount importance in biological membranes, wher...

Journal: :Journal of the American Chemical Society 2003
Jeremiah P Malerich Dirk Trauner

Concise biomimetic syntheses of the antimalarial naphthoquinones (+/-)-pinnatal and (+/-)-sterekunthal A are described.

Journal: :Organic letters 2008
Pallavi Sharma Nicholas Griffiths John E Moses

A short synthesis of the revised structure of the marine natural product tridachiahydropyrone is described. A novel biomimetic photochemical electrocyclization was employed to construct the bicyclic carbon framework from an open-chain polyene precursor. The spectroscopic data matched that of the isolated natural product, supporting a revised structure of this complex metabolite.

Journal: :Nature materials 2002
Rajesh R Naik Sarah J Stringer Gunjan Agarwal Sharon E Jones Morley O Stone

The creation of nanoscale materials for advanced structures has led to a growing interest in the area of biomineralization. Numerous microorganisms are capable of synthesizing inorganic-based structures. For example, diatoms use amorphous silica as a structural material, bacteria synthesize magnetite (Fe3O4) particles and form silver nanoparticles, and yeast cells synthesize cadmium sulphide na...

2004
M. J. Wanner M. J. WANNER J. KOOMEN

Abstract: The presence of rather complicated alkaloids in Nitraria species as racemates suggests a non-enzymic biosynthesis of the skeletons, which implies that these reactions should be reproducible in the lab. In the case of Nitramine and Nitraramine the total synthesis was approached starting from highly symmemc glutarimide derivatives. Insight in the biosynthesis of Nitraria alkaloids led t...

Journal: :Macromolecular bioscience 2005
Jian-Ping Xu Jian Ji Wei-Dong Chen Jia-Cong Shen

Novel biomimetic surfactants based on cholesterol as the hydrophobic segment and poly[2-(methacryloyloxy)ethyl phosphorylcholine] (pMPC) as the hydrophilic segment were synthesized in the present study by atom transfer radical polymerization (ATRP) of 2-(methacryloyloxy)ethyl phosphorylcholine (MPC) using a cholesterol-based macroinitiator. The association behavior of cholesterol-block-poly[2-(...

Journal: :Chemical communications 2011
Thomas Pesnot Markus C Gershater John M Ward Helen C Hailes

A one-pot synthesis of tetrahydroisoquinoline alkaloids in a phosphate buffer has been achieved, and a reaction mechanism proposed. The utilisation of mild reaction conditions readily afforded a range of isoquinolines, including norcoclaurine.

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