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Your search keyword '"Purwono, Bambang"' showing total 3 results
Start Over Author "Purwono, Bambang" Topic indole
3 results on '"Purwono, Bambang"'

1. Indole macrocycles formed by diindolylmethane ring closure.

Author

Purwono, Bambang, Kumar, Naresh, and Black, David StC.

Subjects
*INDOLE, *MACROCYCLIC compounds, *FORMALDEHYDE, *DIAMIDES, *LACTONES
Abstract

Indole containing macrocyclic compounds can be formed from suitable diindolyl diesters and diamides by acidcatalysed reaction with formaldehyde to generate a 2,2'-linkage in the ring closure step. The alternative protocol in which macrocyclisation is attempted by lactone or lactam formation from starting 2,2'-diindolylmethane systems was unsuccessful in our examples. [ABSTRACT FROM AUTHOR]

Published
2022
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3. The nitration of some 4,6-dimethoxyindoles

Author

Jones, Ashley W., Purwono, Bambang, Bowyer, Paul K., Mitchell, Peter S.R., Kumar, Naresh, Nugent, Stephen J., Jolliffe, Katrina A., and Black, David StC.

Subjects
*NITRIC acid, *INORGANIC acids, *SILICON compounds, *NITRATION
Abstract

A range of 3-substituted-4,6-dimethoxyindoles bearing electron-withdrawing groups in either the 2- or 7-position, can be nitrated using nitric acid adsorbed on silica, to give 7-nitro and 2-nitro-indoles, respectively. A 1-cyano-indole gives regioselectively the 2-nitro-indole with loss of the cyano group. [Copyright &y& Elsevier]

Published
2004
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