Chirality control by kinetic protonation: Enantioselective syntheses of (+)-velbanamine, (-)-isovelbanamine, and (+)-cleavamine.
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概要
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Optimal conditions for inversion of the chirality at 2-position of the 2-alkyllactone(<B>5</B>) have been established. By utitizing the inversion method developed, three indole alkaloids, (+)-velbanamine(<B>16</B>), (−)-isovelbanamine(<B>17</B>), and (+)-cleavamine(<B>18</B>), have been synthesized from the chiral lactone(<B>1</B>) which has been previously used for the syntheses of the enantiomers of these alkaloids.
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公益社団法人 日本化学会 | 論文
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