An optimized palladium catalyzed cross-coupling of nonracemic trifluoromethylsulfonyl and fluorosulfonyl enol ethers to arylboronic acids
摘要:
Several trifluoromethylsulfonyl and fluorosulfonyl nonracemic (> 99% e.e.) enol ethers were cross-coupled to arylboronic acid under palladium [PdCl2(dppf)] catalysis to provide in high yield (>98%) selected 1,3-diaryl nonracemic. indenes. (C) 1998 Elsevier Science Ltd. All rights reserved.
Novel pyridines, pyrimidines, pyrazines, pyridazines and triazines, pharmaceutical compositions containing these compounds and their use as endothelin receptor antagonists are described.