The review summarizes and systematizes the [4+ 2]-cycloaddition reactions of o-quinone
methides with electron-rich and electron-deficient olefins. The electron-rich substrates …

In recent decades, a large number of reports related to synthesis of N, O and S containing
heterocycles have appeared owing to a wide variety of their biological activity. We need a …

Spiropyrans and spirooxazines represent an important class of photochromic compounds
with a wide variety of applications. In order to effectively utilize and design these …

Abstract o‐Quinone methides (o‐QMs) are highly reactive, short‐lived intermediates, which
have potential synthetic applicability. However, few studies on the generation of o‐QMs …

THE SYNTHESIS OF 1,2-OXAZINES AND THEIR N-OXIDES Page 1 HETEROCYCLES, Vol.
57, No. 6, 2002, pp. 1149-1178, Received, 6th February, 2002 SYNTHESIS OF 1,2-OXAZINES …

Various 3, 5-disubstituted-1, 2, 4-oxadiazoles are smoothly formed via copper-catalyzed
cascade annulation of amidines and methylarenes. This tandem oxidation–amination …

An HTIB mediated oxidative N− O coupling strategy for the synthesis of some isoxazoline N-
oxide derivatives from β-hydroxyketoximes is described, along with a comparative study of …

Here, we describe mechanistic studies of the retro-Diels− Alder reaction of 4 H-1, 2-
benzoxazines bearing various substituents on the benzene ring. 4 H-1, 2-Benzoxazines are …

1,2-OXAZINES AND THEIR N-OXIDES IN SYNTHESIS Petros G. Tsoungas Ministry of
Development, Department of Research and Technology, Page 1 HETEROCYCLES, Vol. 57, No …

Hydroxy‐1‐naphthaldehyde oxime was oxidized by AgO (or Ag2O), in presence of N‐methyl
morpholine N‐oxide (NMMO), to the title spiro adduct‐dimer (±)‐Spiro {naphthalene‐1 (2H) …