Friedel-Crafts cyclization of 2-(3-indolythio)propionic acids. An unusual rearrangement leading to 4-sulfur-substituted tricyclic indoles
作者:John Y.L. Chung、Robert A. Reamer、Paul J. Reider
DOI:10.1016/s0040-4039(00)61267-4
日期:1992.8
The intramolecular Friedel-Crafts acylation of 2-(3-indolythio)propionic acid 1 has been found to undergo an unprecedented rearrangement to provide a novel tricyclic indole having the sulfur substituted on C-4 rather than on the expected C-3. A mechanism for its formation is proposed. This rearrangement also proceeded with good optical retention when a chiral substrate was used.
已经发现2-(3-吲哚基硫代)丙酸1的分子内弗里德尔-克来福特酰化反应经历了前所未有的重排,从而提供了一种新的三环吲哚,其硫被取代在C-4上而不是预期的C-3上。提出了其形成机制。当使用手性底物时,这种重排也以良好的光学保留性进行。