Wipf, P and Weiner, WS
(1999)
Enantioselective synthesis and photoracemization studies of (±)-2- cyclopropyl-7,8-dimethoxy-2H-chromene-5-carboxylic acid methyl ester, an advanced intermediate of a dihydrofolate reductase inhibitor.
Journal of Organic Chemistry, 64 (14).
5321 - 5324.
ISSN 0022-3263