Enantioselective total synthesis of estradiol methyl ether has been accomplished in a pot‐economical manner using five reaction vessels and four purifications. The key reaction is a diphenylprolinol silyl ether mediated domino Michael/aldol reaction...
Enantioselective total synthesis of estradiol methyl ether has been accomplished in a pot‐economical manner using five reaction vessels and four purifications. The key reaction is a diphenylprolinol silyl ether mediated domino Michael/aldol reaction to afford bicyclo[4.3.0]nonane derivatives, containing the A, C, and D rings of steroids, as a single isomer with excellent enantioselectivity. Six reactions such as oxidation, hydrogenation, formation of acid chloride, Friedel–Crafts reaction, deprotection, and reduction can be carried out in the last one‐pot sequence.
Totalsynthese auf Steroiden: Östradiolmethylether wurde unter Verwendung von nur fünf Reaktionsgefäßen und vier Reinigungsschritten synthetisiert. Der Schlüsselschritt ist eine Diphenylprolinolsilylether‐vermittelte Michael‐Reaktion, und die abschließende Eintopfsequenz umfasst sechs Reaktionen. TMS=Trimethylsilyl.