Aromatic Oligoureas: Enforced Folding and Assisted Cyclization
摘要:
Aromatic oligoureas are forced into well-defined conformation by incorporated intramolecular hydrogen bonds. Shape-persistent tetraureas macrocycles were obtained in a one-step [2 + 2] reaction in good yields.
Aromatic Oligoureas: Enforced Folding and Assisted Cyclization
摘要:
Aromatic oligoureas are forced into well-defined conformation by incorporated intramolecular hydrogen bonds. Shape-persistent tetraureas macrocycles were obtained in a one-step [2 + 2] reaction in good yields.