Photochemical rearrangement of calix[4]arene-derived bis(spirodienones): formation of a new macrocycle.
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.
Varma
Ramavarma Luxmi
RL
Organic Chemistry Section, Chemical Sciences and Technology Division, Regional Research Laboratory (CSIR), Trivandrum 695 019, Kerala, India. lux_varma@rediffmail.com.
Ganga
Viswanathan Bhagavathy
VB
Suresh
Eringathodi
E