Abstract Development of new methods of heterocyclic synthesis is still a topical issue. In this
connection, the trend related to the use of highly reactive o-quinone methides for the …

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 …

A simple and efficient method for the synthesis of 4 H-chromenes and 1 H-benzo [f]
chromenes containing a trifluoroacetyl or aroyl group in the pyran ring from o-quinone …

We have studied the [3+ 2]-cycloaddition of various N, N-cyclic azomethine imines to 3-
nitrobenzofurans. This process is a rare example of their dearomatization. We have also …

A series of 1 H-benzo [f] chromene-2-carbaldehydes was obtained from naphthol Mannich
bases and 3-(N, N-diethylamino) acrolein via a cascade reaction comprising [4+ 2] …

The reaction of o-(chloromethyl) phenols with enamino ketones afforded a series of 3-acyl-
and 3-formyl-4 H-chromenes as a result of cascade transformation including [4+ 2] …

Various substituted pyrrolo [1, 2-a] quinolines and pyrrolo [2, 1-a] isoquinolines were
synthesized in good to high yields by the Et3N-mediated reaction of push–pull 3 …

Nitro-1 H-benzo [f] chromenes reacted with alcohols to give a series of 3-alkoxy-2-nitro-2, 3-
dihydro-1 H-benzo [f] chromenes as mixtures of cis and trans isomers. The reaction of 2-nitro …

A simple route to the series of azolo-condensed benzo [e][1, 3] oxazines such as 9H-benzo
[e][1, 2, 4] triazolo [5, 1-b][1, 3] oxazines, 9H-benzo [e] pyrazolo [5, 1-b][1, 3] oxazines, and …

3-Amino-2, 3-dihydro-1 H-benzo [f] chromenes and 2-[(2-hydroxynaphthalen-1-yl) methyl]-2,
3-dihydro-1 H-benzo [f] chromene-2-carbonitriles were obtained via the reaction of …