Solvent- or temperature-controlled diastereoselective aldol reaction of methyl phenylacetate.

Autor: Ramachandran PV; Herbert C. Brown Center for Borane Research, Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907-2084, USA. chandran@purdue.edu, Chanda PB
Jazyk: angličtina
Zdroj: Organic letters [Org Lett] 2012 Sep 07; Vol. 14 (17), pp. 4346-9. Date of Electronic Publication: 2012 Aug 10.
DOI: 10.1021/ol301782s
Abstrakt: Unlike the enolboration-aldolization of methyl propanoate, the choice of either the solvent or temperature determines the diastereoselectivity during the enolboration-aldolization of methyl phenylacetate. In CH(2)Cl(2), the reaction favors the anti-pathway at -78 °C and the syn-pathway at rt. Conversely, the reaction produces the anti-isomer up to rt and the syn-isomer at refluxing temperatures in nonpolar solvents.
Databáze: MEDLINE