Preface (M. Harmata).The [5+2] cycloaddition chemistry of &bgr;-alkoxy-&ggr;-pyrones (J.L. Mascareñas). Metallocarbenoid-induced cyclization of acetylenic diazo carbonyl compounds (A. Padwa, C.S. Straub). Recent applications of Cr(0)-mediated higher order cycloaddition reactions to natural product synthesis (J.H. Rigby). Indole as a dienophile in inverse electron demand diels-alder and related reactions (L. Lee, J.K. Snyder). Aspects of the intramolecular diels-alder reaction of a furan diene (IMDAF) leading to the formation of 1,4-epoxydecalin systems (B.A. Keay, I.R. Hunt). An allenic [2+2+1] cycloaddition (K.M. Brummond). Index.