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Note | Regular issue | Vol 60, No. 6, 2003, pp.1469-1475
Published online, 28th April, 2003
DOI: 10.3987/COM-03-9772
An Efficient Conversion of Catechine into 3,4-trans-Leucocyanidin

Toyohiko Kikuchi, Masato Nishimura, Atsushi Hoshino, Yasumasa Morita, Shigeru Iida, Norio Saito, and Toshio Honda*

*Faculty of Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo 142-8501, Japan


Catechine was efficiently converted into 3,4-trans-leococyanidin by seven steps involving an acetoxylation at the benzylic position of catechine pentabenzyl ether, followed by hydrolysis, oxidation, deprotection, and stereoselective reduction, successively.