Synthesis and Applications of C₂‐Symmetric Guanidine Bases.

Abstract

Enantioselective syntheses Enantioselective syntheses O 0031Synthesis and Applications of C 2 -Symmetric Guanidine Bases. -The tetracyclic C 2 -symmetric guanidinium salts (I) are investigated as catalysts in different enantioselective reactions. In particular, (Ic) is an effective catalyst for phase-transfer reactions, e.g. benzylation of (VIII) or epoxidations of (XI). -(ALLINGHAM, M. T.; HOWARD-JONES, A.; MURPHY*, P. J.; THOMAS, D. A.; CAULKETT, P. W. R.; Tetrahedron Lett. 44 (2003) 48, 8677-8680; Dep. Chem., Univ. Wales, Gwynedd, Wales LL57 2UW, UK; Eng.) -Roy 10-026