90695-44-6Relevant academic research and scientific papers
Chelation-controlled ester-derived titanium enolate aldol reaction: Diastereoselective syn-aldols with mono- and bidentate aldehydes
Ghosh, Arun K,Kim, Jae-Hun
, p. 5621 - 5624 (2007/10/03)
A chelation-controlled and highly diastereoselective synthesis of syn-aldols is described. Aldol reaction of (S)-valinol-derived ester with a variety of aldehydes proceeded with high syn-diastereoselectivities (up to 99:1) and isolated yields (94%).
Syntheses of (+)-Oudemansin and (+)-Epioudemansin Starting from Enantiomerically Pure Precursors; Absolute Configuration of the Naturally Occuring (-)-Oudemansin
Meyer, Hartmut H.
, p. 791 - 801 (2007/10/02)
The syntheses of the four optically pure methyl (E)-3-hydroxy-2-methyl-5-phenyl-4-pentenoates (+)- and (-)-5 as well as (+)- and (-)-6 were achieved by consecutive methylation and protonation of enolates, starting from (+)- and (-)-4.The esters (+)-6 and
STEREOSELECTIVE ADDITIONS TO CARBOXYLIC ACID DIANIONS AND β-LACTONE SUBSTITUTED ESTER ENOLATES. APPLICATION TO THE SYNTHESIS OF RACEMIC EPI-BLASTMYCINONE, δ-MULTISTRIATINE, PARACONIC ESTERS AND LIGNANTYPE DILACTONES
Mulzer, Johann,Lasalle, Peter de,Chucholowski, Alexander,Blaschek, Ursula,Bruentrup, Gisela,et al.
, p. 2211 - 2218 (2007/10/02)
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.
