Studies toward the total synthesis of (+)-ptilomycalin A. Use of a tethered Biginelli condensation for the preparation of an advanced tricyclic intermediate
摘要:
An intramolecular ureidoaldehyde condensation, 16 + (R)-14 --> 19, is the key step in a seven-step preparation of the enantiopure spirotricycle 23, a potential intermediate for the enantioselective total synthesis of ptilomycalin A.
Studies toward the total synthesis of (+)-ptilomycalin A. Use of a tethered Biginelli condensation for the preparation of an advanced tricyclic intermediate
摘要:
An intramolecular ureidoaldehyde condensation, 16 + (R)-14 --> 19, is the key step in a seven-step preparation of the enantiopure spirotricycle 23, a potential intermediate for the enantioselective total synthesis of ptilomycalin A.