The efficient and simple stereoselective approach toward the total synthesis of simplactone A is described. The key features of this synthetic strategy include stereoselective C-ethylation, selective triol protection, and Wittig olefination for the formation of the six-membered ring. (c) 2009 Elsevier Ltd. All rights reserved.
Zum stereochemischen Verlauf der Biosynthese von 2-Oxo-pantolacton: Synthese von stereospezifisch indiziertem Pantolacton aus Äpfelsäure
作者:Daniel Wasmuth、Duilio Arigoni、Dieter Seebach
DOI:10.1002/hlca.19820650136
日期:1982.2.3
malate (7) in 40% yield in a short sequence involving double alkylation (7 10 11), selective hydrolysis (11 12) and subsequent reduction (12 13). Through variation of the alkylating agents and preparation of the two diastereomeric 3-ethyl-3-methyl malates 14 and 15 it was possible to show that the diastereoselectivity of the second alkylation step is brought about by preferential attack from the Re-face
The efficient and simple stereoselective approach toward the total synthesis of simplactone A is described. The key features of this synthetic strategy include stereoselective C-ethylation, selective triol protection, and Wittig olefination for the formation of the six-membered ring. (c) 2009 Elsevier Ltd. All rights reserved.