Issue 8, 1990

Asymmetric total synthesis of naturally occurring (R)-(–)-enantiomer of tylophorine via intramolecular double Michael reaction

Abstract

The first asymmetric total synthesis of the naturally occurring (R)-(–)-enantiomer (1) of tylophorine was achieved with high enantioselectivity via the intramolecular double Michael reaction of α,β-unsaturated esters (10) and (20), having two different chiral auxiliaries, with t-butyldimethylsilyl trifluoromethanesulphonate in the presence of triethylamine. (–)-Phenylmenthol and (2R,4S,5R)-(–)-4-(t-butyldimethylsiloxymethyl)-5-hydroxy-2-phenyl-1,3-dioxane, readily available from D-glucose, were used as chiral auxiliaries.

Article information

Article type
Paper

J. Chem. Soc., Perkin Trans. 1, 1990, 2287-2292

Asymmetric total synthesis of naturally occurring (R)-(–)-enantiomer of tylophorine via intramolecular double Michael reaction

M. Ihara, Y. Takino, M. Tomotake (née Tsuruta) and K. Fukumoto, J. Chem. Soc., Perkin Trans. 1, 1990, 2287 DOI: 10.1039/P19900002287

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