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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
Editor
May 11, 2023
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Paper | Regular issue | Vol 31, No. 11, 1990, pp.1975-1982
Published online, 1st January, 1970■ Chiral Prodyes. Ethers and Esters of Dihydrofluorescein, Part 1: Dibenzyldihydrofluorescein (DBDF) a New Reagent
Published online, 1st January, 1970
DOI: 10.3987/COM-90-5511
■ Chiral Prodyes. Ethers and Esters of Dihydrofluorescein, Part 1: Dibenzyldihydrofluorescein (DBDF) a New Reagent
Dragana Tadic and Arnold Brossi*
*Natural Products Section, Laboratory of Structural Biology, NIDDK, National Instutute of Health, Bethesda, Maryland 20892-0815, U.S.A.
Abstract
Ethers and esters of dihydrofluorescein (4) were prepared by chemical modification of the benzyl ester (6), obtained by benzylation of fluorescein (1), and reduction of benzyl ester (3) with sodium borohydride.
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