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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
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May 11, 2023
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Paper | Regular issue | Vol 31, No. 3, 1990, pp.523-527
Published online, 1st January, 1970■ Synthesis of Milrinone, a Cardiotonic Agent
Published online, 1st January, 1970
DOI: 10.3987/COM-89-5276
■ Synthesis of Milrinone, a Cardiotonic Agent
Min-Jen Shiao,* Li-Ming Shyu, and Chieh-Fu Chen
*Institutue of Chemistry, Academia Sinica, 128, Yan-Chiu-Yuan Road, Sec II, Nankang, Taipei,11529, Taiwan, R.O.C.
Abstract
A new synthesis of milrione (6) from 6-methyl-5-(4-pyridiyl)-2(1H)-pyridone (4) is reported. A convenient synthesis of 3,4’-bipyridines (3a) and (3b) is achieved. 3a and 3b can be converted into pyridone 4 by hydrogenolysis and hydrolysis, respectively. Bromination at C-3 of the pyridone ring of 4 followed by cyanation affords milrinone (6).
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