Simultaneous Functionalization and Cyclization of 2-Ethynylaniline Derivatives to Indoles
作者:Kou Hiroya、Shin Itoh、Kiyofumi Inamoto、Hiroki Shigehisa、Takao Sakamoto
DOI:10.3987/com-16-s(s)60
日期:——
Two different kind of sequential cyclization-functionalization are developed. Namely, cyclization-chlorination of 2-ethynylaniline derivatives using CuCl2 gave 3-chloro- and 3,5-dichloroindole derivatives. The plausible mechanism for this reaction is also discussed. On the other hand, the reaction between 2-ethynylaniline derivatives and Cu(NO3)(2)center dot 3H(2)O in THF provided C4-nitro compound. After being changed the solvent from THF to DMF, followed by heating, 5-nitroindole derivatives was afforded.