HETEROCYCLES
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Obituary
Zenichi Yoshida (1925-2023)
Zenichi Yoshida (1925-2023)
Professor. Zenichi Yoshida,
a member of the Honorary Advisors of HETEROCYCLES (1975-1998),
has passed away on May 4, 2023 at the age of 97.
I deeply express my regret over his death.
Kunio Ogasawara
Editor
May 11, 2023
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Note | Regular issue | Vol 51, No. 9, 1999, pp.2163-2169
Published online, 1st January, 1970■ Synthesis of 2-Hydroxypyrido[2,3-a]-carbazoles and 2-Hydroxypyrimido[4,5-a]carbazoles from 1-Hydroxycarbazoles
Published online, 1st January, 1970
DOI: 10.3987/COM-99-8587
■ Synthesis of 2-Hydroxypyrido[2,3-a]-carbazoles and 2-Hydroxypyrimido[4,5-a]carbazoles from 1-Hydroxycarbazoles
Kandasamy Shanmugasundaram and Karnam J. Rajendra Prasad*
*Department of Chemistry, Bharathiar University, Coimbatore - 641 046, Tamil Nadu, India
Abstract
Gattermann reaction on substituted 1-hydroxycarbazoles (4a-d) afforded substituted 1-hydroxycarbazole-2-carbaldehydes (5a-d) from which synthesis of either 2-hydroxypyrido[2,3-a]carbazoles (7a-d) via Perkin reaction or 2-hydroxypyriinido[4,5-a]carbazoles (8a-d) via condensation with urea could be achieved.
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