A Facile Method to Synthesize Spiro-calix4arenes

摘要

The spiro-calix[4]arenes 3a-b can be synthesized conveniently by the reaction of p-tert-butylcalix[4]arene (1a) or calix[4]arene (1b) with pentaerythritol tetrakis(2-chloroacetate) (2).