Chemical and Pharmaceutical Bulletin p. 1287 - 1293 (1995)
Update date:2022-07-31
Topics:
Murakami
Watanabe
Otsuka
Iwata
Yamada
Yokoyama
In connection with studies on the direction of cyclization in the Fischer indolization of substituted diphenylhydrazones, the Fischer indolization of ethyl pyruvate 2-bis(2-methoxyphenyl)hydrazone (6) was carried out. The result showed that cyclization in Fischer indolization of diphenylhydrazone does not always proceed to the electron-richer nucleus, but depends on the conformation of the enehydrazine. Thus, the Fischer indolization should proceed via a [3,3] sigmatropic route, with an electronic effect.
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Doi:10.1016/0040-4039(95)01677-A
(1995)Doi:10.1007/BF00714449
(1995)Doi:10.1080/15257779508009745
(1995)Doi:10.1016/00404-0399(50)17638-
(1995)Doi:10.1016/0040-4039(95)01732-W
(1995)Doi:10.1016/S0040-4020(98)00219-1
(1998)
