Reactive intermediates as recognized chemical entities date back for over a century, and
among the earliest examples were simple free radicals, as identified in 1879, when it was …

Abstract β‐Keto amides have multiple nucleophilic and electrophilic reaction sites within
their molecular structures, which make them excellent building blocks for the construction of …

Ketenes as Privileged Synthons in the Synthesis of Heterocyclic Compounds Part 3: Six-Membered
Heterocycles - ScienceDirect Skip to main contentSkip to article Elsevier logo Journals & …

This review provides detailed methods for the synthesis, structures and chemical properties
of 4-hydroxythiocoumarin and its most valuable bioactivities are mentioned. This compound …

4-Hydroxy-2-pyrones are of interest as potential biorenewable molecules for a sustainable
transition from biomass feedstock to valuable chemical products. This review focuses on the …

The physical organic chemistry of ketenes is reviewed, with an emphasis on recent
developments. Ketenes provided the first examples of cycloaddition reactions, and these …

Various 4, 6-diaryl-3-substituted-5, 6-dihydropyran-2-ones (3a-f) were achieved in good to
excellent yield by hetero-Diels-Alder reaction of 1, 3-diaryl-prop-2-en-1-ones (1a-f) and in …