The Chemistry of Indoles. Part 85. Novel and Simple Syntheses of 5H-Pyrido(4,3-b)indole (.GAMMA.-Carboline) Derivatives Having a Methoxycarbonyl Group at the 4-Position Based on 1-Hydroxyindole Chemistry.
Syntheses of Wasabi Phytoalexin (Methyl 1-Methoxyindole-3-carboxylate) and Its 5-Iodo Derivative, and Their Nucleophilic Substitution Reactions
摘要:
A simple synthetic method for methyl 1-methoxyindole-3-carboxylate, a phytoalexin isolated from Wasabia japonica, syn. Eutrema wasabi, and its 5-iodo derivative is reported. They underwent nucleophilic substitution reactions selectively at the 2-position.
1-Methoxyindole-3-carbaldehyde is proved to be a versatile electrophile and reacts regioselectively at the 2-position with various types of nucleophiles providing 2-substituted indole-3-carbaldehydes.