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Synthesis of 6-Cyano-2,2-dimethyl-2H-1-benzopyran and Other Substituted 2,2-Dimethyl-2H-1-benzopyrans

โœ Scribed by North, Jeffrey T.; Kronenthal, David R.; Pullockaran, Annie J.; Real, Sharon D.; Chen, Helen Y.


Book ID
125931303
Publisher
American Chemical Society
Year
1995
Tongue
English
Weight
531 KB
Volume
60
Category
Article
ISSN
0022-3263

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Asymmetric synthesis of 4-amino-3,4-dihy
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