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3-羟基 -苯并二氢吡喃 - 4-酮肟在 Pd/ C- HBr催化氢化得到高选择性的 cis- 4-氨基苯并二氢吡喃 - 3-醇 ,其中 1.0当量的 48% HBr在甲醇中反应选择性最好 ,cis∶ trans=2 5∶ 1,收率 94%。α-羟基肟的立体选择性还原@马翔
The 3-hydroxy-chroman-4-one oxime was catalytically hydrogenated over Pd / C-HBr to give the highly selective cis-4-aminochroman-3-ol where 1.0 equivalent of 48% The best reaction selectivity of HBr in methanol was cis: trans = 25:1, yield 94%. Stereoselective Reduction of α-Hydroxyoxime @ Ma Xiang