The synthesis of atalantrenes B, C and D, styrene-dimers from the seeds of Atalantia monophylla

Concise syntheses of three recently reported natural products from Atalantia monophylla are reported. The syntheses required the preparation and careful dimerization of highly electron rich styrenes under acidic conditions. The present work adds to a growing body of evidence that demonstrates that synthetic utility of chiral phosphoric acids in asymmetric reactions using styrene-type compounds.