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Synthesis of 2-[(3-aminoalkyl or 3-bromoalkyl)amino]-4H-1-benzopyran-4-one derivatives

✍ Scribed by Enzo Sottofattori; Teresa Grandi; Alessandro Balbi

Book ID
103402191
Publisher
Elsevier Science
Year
1995
Tongue
French
Weight
130 KB
Volume
36
Category
Article
ISSN
0040-4039

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## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

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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