Isolation of Streptonigrin and Its Novel Derivative from <i>Micromonospora</i> as Inducing Agents of p53-Dependent Cell Apoptosis
作者:Haishan Wang、Su Ling Yeo、Jin Xu、Xiaoli Xu、Hong He、Francesca Ronca、Anthony E. Ting、Yue Wang、Victor C. Yu、Mui Mui Sim
DOI:10.1021/np0104572
日期:2002.5.1
Streptonigrin (1) and its novel natural derivative 7-(1-methyl-2-oxopropyl)streptonigrin (2) were isolated from an actinomycete strain, Micromonospora sp. IM 2670. The inductions for 1 and 2 are more potent in the human neuroblastoma SH-SY5Y cells that contain wild-type p53 than in SH-SY5Y-5.6 cells that overexpress a dominant negative mutant of p53, thus suggesting that they induce apoptosis through a p53-dependent pathway.
Heteroannulation of arynes with N-aryl-α-aminoketones for the synthesis of unsymmetrical N-aryl-2,3-disubstituted indoles: an aryne twist of Bischler–Möhlau indole synthesis
Reaction of 2-(trimethylsilyl)aryl triflates 1 with N-aryl-alpha-amino ketones 2 afforded N-aryl-2,3-disubstituted indoles in good to excellent yields with complete control of the substitution patterns. This methodology allowed for the first time a one-stepsynthesis of unsymmetrical 2,3-dialkyl substituted indoles in a regiospecific manner.