title: Photochemical rearrangement of calix[4]arene-derived bis(spirodienones): formation of a new macrocycle.
abstract: Bis(spirodienones) of calix[4]arene undergo a facile photochemical rearrangement leading to a new macrocycle having a spirocyclic cyclopentenone-THF unit, a trisubstituted phenol, and a benzofuran moiety. The macrocyclic ring system has a 14-membered irregular cavity and resembles a partial bowl in the solid state.
authors.affiliation: Organic Chemistry Section, Chemical Sciences and Technology Division, Regional Research Laboratory (CSIR), Trivandrum 695 019, Kerala, India. lux_varma@rediffmail.com.
authors.forename: Ramavarma Luxmi
authors.initials: RL
authors.lastname: Varma
authors.forename: Viswanathan Bhagavathy
authors.initials: VB
authors.lastname: Ganga
authors.forename: Eringathodi
authors.initials: E
authors.lastname: Suresh