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2005
Amino acids
U 0400
Three-Component Synthesis of α,β-Cyclopropyl-γ-amino Acids. — An efficient
to novel title acids includes the one-pot, three-component reaction of alke33- 228 approach
nylzirconocenes, diiodomethane and benzaldimines. The target compounds are now
accessible on multigram scale in ca. 10 steps and 35-50% overall yield from simple
alkynes. A new sequential water-accelerated methylalumination/imine addition/
Simmons—Smith cyclopropanation strategy to (IX) is developed. — (WIPF*, P.;
STEPHENSON, C. R. J.; Org. Lett. 7 (2005) 6, 1137-1140; Dep. Chem., Univ.
Pittsburgh, Pittsburgh, PA 15260, USA; Eng.) — R. Steudel
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