The cyclic bisbibenzyl systems Marchantin I (3), Riccardin C (4) and Isoplagiochin C (5) representing unique types of bryophyte constituents were prepared by a flexible, efficient and general synthetic approach involving the construction of biphenyl and bibenzyl units using Suzuki and Wittig protocols.
Bryophyte Constituents. Part 9. Syntheses of Cyclic Bisbibenzyl Systems.-The cyclic bisbibenzyl bryophyte constituents marchantin I (IX), isoplagiochin C (X) and riccardin C (XI) are synthesized by Suzuki or Wittig coupling in 15, 8 and 12 steps, resp., and 10, 25, and 12% overall yields, respectively. -(EICHER, T.; FEY, S.; PHUL, W.; BUECHEL, E.; SPEICHER, A.; Eur.
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