In:
Green Processing and Synthesis, Walter de Gruyter GmbH, Vol. 7, No. 4 ( 2018-07-26), p. 316-322
Kurzfassung:
A series of pentasubstituted 4 H -pyrans and tetrahydrobenzo[ b ]pyrans are synthesized with excellent yields via a one-pot condensation of aromatic aldehydes, malononitrile, and a dicarbonyl compound, ethyl acetoacetate, acetyl-acetone or dimedone, in the presence of 4 Å molecular sieve modified with zinc(II) as heterogeneous catalyst, in ethanol. The process offers numerous advantages, such as better yield, short reaction time, and mild reaction conditions. The catalyst’s preparation is simple and it could be reused while still maintaining its activity.
Materialart:
Online-Ressource
ISSN:
2191-9550
,
2191-9542
DOI:
10.1515/gps-2017-0083
Sprache:
Unbekannt
Verlag:
Walter de Gruyter GmbH
Publikationsdatum:
2018
ZDB Id:
2645923-1