Tetrahedron p. 2211 - 2218 (1984)
Update date:2022-08-05
Topics:
Mulzer, Johann
Lasalle, Peter de
Chucholowski, Alexander
Blaschek, Ursula
Bruentrup, Gisela
et al.
New stereoselective syntheses are reported for racemic 4-epi-blastmycinone (6) and δ-multistriatine (13) utilizing the anti-configurated γ,δ-unsaturated β-hydroxy-carboxylic acids 2a/b.A diastereo- and enantioselective aldoltype addition of phenylacetic acid dianion to benzaldehyde has been achaived by employing optically active alkoxide amide bases.Finally, highly stereocontrolled additions to the novel β-lactone substituted ester enolates 22 are described.
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