Reactions of indole-3-acetic acid derivatives in trifluoroacetic acid
作者:Jan Bergman、Eva Koch、Benjamin Pelcman
DOI:10.1016/0040-4039(95)00648-v
日期:1995.5
TFA-induced dimerization of indole-3-acetic acid (IAA) gave 5a. The corresponding methyl ester gave the diester 5b or the lactam 6. Similar treatment of the 2,3-bis-(3-indolyl)-succinic ester 4b gave the tetrahydroindolo[2,3-a]carbazole derivative 10. The relation of these compounds to indolocarbazole alkaloids is discussed.
TFA诱导的吲哚-3-乙酸(IAA)的二聚反应得到5a。相应的甲酯得到二酯5b或内酰胺6。对2,3-双-(3-吲哚基)-琥珀酸酯4b进行类似处理,得到四氢吲哚并[2,3- a ]咔唑衍生物10。讨论了这些化合物与吲哚咔唑生物碱的关系。
Photooxidation of 2,2′-indolylindolines to 2,2′-biindoles: Mild formation of ditryptophan crosslinks
作者:David S Carter、David L Van Vranken
DOI:10.1016/0040-4039(96)01220-8
日期:1996.8
2,2′-Indolylindolines undergo facile photooxidation to form symmetrical fluorescent 2,2′-biindoles. The reaction proceeds slowly in air under ambient light, but direct irradiation facilitates the reaction. Peptide and N-glycosylated substrates are compatible with this mild photooxidation.