The generation and reaction of a lactone-derived oxiranylanion is described. The aldol-type reaction of the epoxylactone and aldehydes was accomplished by a two-step procedure via the trimethylsilyl epoxylactone. The application of this methodology to the total synthesis of (+)-epolactaene and its analogs is described.
A base-mediated synthesis of N-hydroxy- and N-alkoxyindoles from 2-nitrostyrenes
作者:Blaine T. McClay、Katharine E. Lambson、Serge R. Banini、Tural N. Akhmedov、Björn C.G. Söderberg
DOI:10.1016/j.tet.2023.133578
日期:2023.9
2-(2-nitroaryl)-2-butenoates with potassium tert-butoxide and an electrophile, such as methyl iodide, benzyl bromide and allyl bromide, afforded N-alkoxyindoles. In related reactions, using sodium tert-pentoxide as the base with or without in situ addition of an electrophile afforded N-alkoxy- and N-hydroxyindoles, respectively. Electrophiles such as dimethylsulfate, p-tosyl chloride, and acetic anhydride afforded