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Solid-Phase Synthesis of Oligourea Peptidomimetics (1999)

Boeĳen, Astrid ; Liskamp, Rob M. J.

Weinheim : Wiley-Blackwell

Liebigs Annalen 1999 (1999), S. 2127-2135

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ISSN: 1434-193X

Schlagwort(e): Oligourea peptidomimetics ; Photocleavable linker ; Solid-phase synthesis ; Isocyanates ; Hydantoins ; Chemistry ; General Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: A procedure for the solid-phase synthesis of oligourea peptidomimetics starting from Boc-protected monomers is described. The compounds are prepared on Tentagel® resin and can be obtained selectively either as the C-terminal free acids with UV irradiation when a photocleavable linker is used or as C-terminal hydantoins with 10% TEA/MeOH and a catalytic amount of KCN.

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

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Digitale Medien

Isocyanates of Esters of Some Acids of Phosphorus and SilicionDedicated to Prof. Dr. Otto Bayer on the occasion of his 60th birthday (1962)

Holtschmidt, H. ; Oertel, G.

Weinheim : Wiley-Blackwell

Angewandte Chemie International Edition in English 1 (1962), S. 617-621

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ISSN: 0570-0833

Schlagwort(e): Isocyanates ; Phosphorus ; Silicon ; Chemistry ; General Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Several aminoaryl esters of phosphoric and thiophosphoric acids were prepared by the reaction of phosphorus pentahalides with nitrophenols, followed by catalytic hydrogenation, or by treating aminophenols with phosphorus trihalides and oxidation to pentavalent phosphorus. These amino esters were then converted into isocyanato esters by the action of phosgene. Isocyanates of phosphonates have been synthetized on the same principle, as well as via the Arbusov reaction of halogen-substituted isocyanates with trialkyl phosphites. The reaction of silicon halides or alkylhalogenosilanes with aminophenols yielded aminoaryl esters of silicic acid or its derivatives, which could also be treated with phosgene to convert them into isocyanato esters.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/anie.196206171

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Digitale Medien

The Preparation of Carbodiimides from IsocyantesDedicated to Prof. Dr. Otto Bayer on the occasion of his 60th birthday. (1962)

Neumann, W. ; Fisher, Peter

Weinheim : Wiley-Blackwell

Angewandte Chemie International Edition in English 1 (1962), S. 621-625

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ISSN: 0570-0833

Schlagwort(e): Carbodiimides ; Isocyanates ; Chemistry ; General Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Carbodiimides are formed with simultaneous evolution of CO2 by the reaction of basic catalyst with sterically hindered isocynates. Another generally applicable synthesis of carbodiimides involves intermediate formation of cyclic adducts of isocyanates and carbodiimides, which, upon cleavage, exchange the isocyanate and carbodiimide functions. Both processes are suitable for the preparation of polycarboiimides. Several commercial applications of mono- and polycarbodiimides are pointed out.

Zusätzliches Material: 4 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/anie.196206211

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