A novel silyl linker: Motif for side chain tethered approach to solid-phase glycopeptide synthesis
摘要:
In order to facilitate the solid-phase syntheses of protected glycopeptide blocks, we designed a novel silyl linker, which allows the alcoholic side chain (carbohydrate, serine, or threonine) of (glyco-)peptides to link to the solid support. Utilizing this linker, peptide coupling reactions at both the N- and the C-termini were successful. Synthesis of the glycophorin AM fragment corresponding to the N-terminal glycoheptapeptide is demonstrated. (C) 1999 Elsevier Science Ltd. All rights reserved.
Rearrangements of organosilicon compounds using organoaluminum reagents. Conversion of phenyl- and alkenyl(chloromethyl)silanes to benzyl- and allylsilanes
摘要:
Various (chloromethyl)silanes undergo Wagner-Meerwein-type rearrangements using a catalytic amount of EtAlCl2 in dichloromethane. The resulting chlorosilanes have been converted to alkyl(or aryl)silanes with RMgX and/or to fluorosilanes with NH4BF2. In this way phenyl-, alkenyl-, and allyl(chloromethyl)silanes were converted to benzyl-, allyl-, and homoallylsilanes, respectively. Attempted rearrangements of methyl-, alkynyl-, and furyl(chloromethyl)silanes under these conditions were not successful.
Rearrangements of organosilicon compounds using organoaluminum reagents. Conversion of phenyl- and alkenyl(chloromethyl)silanes to benzyl- and allylsilanes
作者:Paul F. Hudrlik、Yousef M. Abdallah、Ashok K. Kulkarni、Anne M. Hudrlik
DOI:10.1021/jo00050a034
日期:1992.11
Various (chloromethyl)silanes undergo Wagner-Meerwein-type rearrangements using a catalytic amount of EtAlCl2 in dichloromethane. The resulting chlorosilanes have been converted to alkyl(or aryl)silanes with RMgX and/or to fluorosilanes with NH4BF2. In this way phenyl-, alkenyl-, and allyl(chloromethyl)silanes were converted to benzyl-, allyl-, and homoallylsilanes, respectively. Attempted rearrangements of methyl-, alkynyl-, and furyl(chloromethyl)silanes under these conditions were not successful.
A novel silyl linker: Motif for side chain tethered approach to solid-phase glycopeptide synthesis
In order to facilitate the solid-phase syntheses of protected glycopeptide blocks, we designed a novel silyl linker, which allows the alcoholic side chain (carbohydrate, serine, or threonine) of (glyco-)peptides to link to the solid support. Utilizing this linker, peptide coupling reactions at both the N- and the C-termini were successful. Synthesis of the glycophorin AM fragment corresponding to the N-terminal glycoheptapeptide is demonstrated. (C) 1999 Elsevier Science Ltd. All rights reserved.