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Synthesis and antihypertensive activity of substituted trans-4-amino-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-3-ols

โœ Scribed by Evans, John M.; Fake, Charles S.; Hamilton, Thomas C.; Poyser, Robert H.; Watts, Eric A.

Book ID
115463093
Publisher
American Chemical Society
Year
1983
Tongue
English
Weight
867 KB
Volume
26
Category
Article
ISSN
0022-2623

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Asymmetric synthesis of 4-amino-3,4-dihy
Asymmetric synthesis of 4-amino-3,4-dihydro-2,2-dimethyl-2H-1-benzopyrans
โœ Andreas Burgard; Hans-Jochen Lang; Uwe Gerlach ๐Ÿ“‚ Article ๐Ÿ“… 1999 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 385 KB

Highly enantioselective reduction of 3,4-dihydro-2,2-dimethyl-2H-l-benzopyran-4-ones 3 s-e by BH3 was achieved in the presence of catalytic amounts of Corey's oxazaborolidine 4 to afford the corresponding 3,4-dihydro-2,2dimetbyl-2H-l-~nzopyran-4-ols 2a-e in quantitative yields. These benzopyran-4-ol