Aminosäuren 9. Mitt. Stereospezifische Synthese von heterocyclisch substitutierten Dehydroaminosäurederivaten
作者:Claus Herdeis、Jyrki Syväri
DOI:10.1002/ardp.19883210813
日期:——
Eine stereospezifische Synthesemethode zur Darstellung chiral und achiral substituierter E‐ bzw. Z‐konfigurierter α‐Dehydroaminosäurederivate wird beschrieben. Einige der synthetisierten Verbindungen zeigen positiv inotrope Wirkung am Meerschweinchenherzen.
The alkylation of menthyl hippurate and some related materials: a reinvestigation.
作者:John M. McIntosh、Rasiah Thangarasa、Nancy K. Foley、David J. Ager、Diane E. Froen、Russell C. Klix
DOI:10.1016/s0040-4020(01)85060-2
日期:1994.2
Benzylation of chiral esters of N-acylglycines using various bases and additives was examined. No C-alkylation was observed with one equivalent of base. Diastereoselectivities were dependent on the amount of additive, the nature of the N-acyl group, and the chiral ester. A model to account for the degree and sense of the stereoselectivity is proposed.
A concise three-step synthesis of cis- and trans-4-hydroxy-L-proline on a preparative scale has been carried out using readily available starting materials.
DAVENPORT, K. G.;MAO, D. T.;RICHMOND, C. M.;BERGBREITER, D. E.;NEWCOMB, M+, J. CHEM. RES. MICROFICHE, 1984, N 5, 148-149
作者:DAVENPORT, K. G.、MAO, D. T.、RICHMOND, C. M.、BERGBREITER, D. E.、NEWCOMB, M+
DOI:——
日期:——
Synthesis of diastereo- and enantiomerically pure α-amino-γ-oxo acid esters by reaction of acyliminoacetates with enamines derived from 6-membered ketones
A new efficient diastereo- and enantioselective synthesis of α-amino-γ-oxo acid esters by reaction of acyliminoacetates with enamines is described. By employing the concept of double stereodifferentiation, complete asymmetric induction (de ≧99.9%) for the C-C bond formation is obtained. Desulphurization of a sulphur containing product leads to the corresponding acyclic amino acid derivatives. The