期刊
ADVANCED SYNTHESIS & CATALYSIS
卷 350, 期 1, 页码 95-106出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsc.200700308
关键词
1,4-benzoquinone; enamides; isomerization; nitrogen heterocycles; olefin metathesis
A comprehensive study on the synthesis and ring-closing metathesis (RCM) of alpha,beta-dehydroamino acids is described. This sequence has led to the formation of a range of biologically relevant functionalized nitrogen heterocycles. The incorporation of chiral building blocks in the RCM precursors eventually resulted in the formation of optically active 4-substituted cyclic dehydroamino acids. In addition, olefin isornerization under metathesis conditions was observed for a number of compounds, which could be successfully inhibited either by the introduction of allylic substituents or by the addition of a ruthenium hydride scavenger.
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