Ganga, V B; Suresh, E; Suresh, C H; Luxmi Varma, R
(CSIR, 2008)
The reactivity of calix[4]bis(spirodienones) depends on the nature of the dienophile used. With 1,4-benzoquinones it acts as a 4 pi component whereas with 1,2-benzoquinones as a 2 pi system, yielding benzodioxin derived ...