The reactive intermediates known as acylketenes exhibit a rich chemistry and have been
extensively utilized for many types of inter-and intramolecular bond-forming reactions within …

The carbonylation of carbenes through catalytic cycles is highly desirable due to the
importance of ketene-mediated reactions in organic synthesis. In this investigation, a highly …

The Pechmann reaction introduces one of the most significant and simple methods for the
synthesis of a variety of heterocyclic compounds, particularly coumarin derivatives. In 1883 …

Eco-friendly direct solvent-free synthesis of flavones is achieved by microwave irradiation of
phloroglucinol and β-ketoesters. Heating with microwaves versus under classical conditions …

The reactions of vinylketene (1a), imidoylketene (1b), and formylketene (1c) with
formaldimine (2) were studied at the B3LYP/6-31G* level. For the cycloadditions of these …

An organocatalytic asymmetric synthesis of δ‐amino‐β‐ketoester derivatives has been
developed. A chiral disulfonimide (DSI) serves as a highly efficient precatalyst for a …

Density functional (B3LYP/6-311+ G**) and ab initio (MP2/6-311+ G** and MP4 (SDTQ)/6-
311+ G**//MP2/6-311+ G**) calculations on the ring closure reactions of (E)-and Z …

Ring openings of 2-furylcarbene (5a), 2-pyrrolylcarbene (5b), 1-cyclopenta-1, 3-
dienylcarbene (5c), and of 11, as well as of the 3-and five-membered ring vinylogs (7a, 7c …

Pericyclic or pseudopericyclic? Although both mechanisms lead to the same product, they
are deeply different in nature. The ring-current model proves to be a useful tool to define …

Flash vacuum pyrolysis (FVP) is a gas-phase continuous-flow technique where a substrate
is sublimed through a hot quartz tube under high vacuum at temperatures of 400–1100° C …