Journal
NATURE CHEMISTRY
Volume 3, Issue 8, Pages 642-646Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NCHEM.1096
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Funding
- Ministry of Education, Culture, Sports, Science and Technology, Japan
- Grants-in-Aid for Scientific Research [21000006] Funding Source: KAKEN
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Successful implementation of a catalytic asymmetric synthesis strategy to produce enantiomerically enriched compounds requires the adoption of suitable prochiral substrates. The combination of an azomethine imine electrophile with various nucleophiles could give straightforward access to a number of synthetically useful chiral hydrazines, but is used rarely. Here we report the exploitation of acyclic azomethine imines as a new type of prochiral electrophile. They can be generated in situ by the condensation of N'-benzylbenzoylhydrazide with a variety of aldehydes in the presence of a catalytic amount of an axially chiral dicarboxylic acid. By trapping these electrophiles with alkyl diazoacetate or (diazomethyl) phosphonate nucleophiles, we produced a diverse array of chiral alpha-diazo-beta-hydrazino esters and phosphonates with excellent enantioselectivities.
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