A convenient one-pot synthesis of thiopyrano[4,3-<i>b</i>]pyran derivatives under LiOH·H<sub>2</sub>O/EtOH/ultrasonic conditions
作者:Ladan Pourabdi、Fatemeh Osati、Mohammad M. Mojtahedi、Saeed M. Abaee
DOI:10.1080/17415993.2016.1223299
日期:2017.1.2
ABSTRACT Various derivatives of thiopyrano[4,3-b]pyran structure are synthesized via a multicomponent procedure starting from tetrahydro-4H-thiopyran-4-one, aromatic aldehydes, and malononitrile. Reactions take place by the use of catalytic quantities of LiOH·H2O in one pot under ultrasonic conditions and in an ethanolic medium. Isolation of products occurs by spontaneous precipitation in reaction
Synthesis of Bis(arylmethylidene)thiopyranones and Crystal Structure of the Phenyl Derivative
作者:M. Saeed Abaee、Mohammad M. Mojtahedi、M. Mehdi Zahedi、A. Wahid Mesbah、Nafiseh Mohaddes Ghandchi、Werner Massa
DOI:10.1080/10426500701542759
日期:2007.10.18
A convenient method is offered for double aldol condensation of tetrahydrothiopyran-4-one with aromatic aldehydes under LiBr catalysis. An X-ray analysis verifies the proposed structures.
Preparation of thiopyrano- and pyrano[4,3-c]pyrazoles. Structure elucidation of dehydro coproducts
作者:George C. Rovnyak、Virginia Shu
DOI:10.1021/jo01328a041
日期:1979.7
ROVNYAK G. C.; SHU V., J. ORG. CHEM., 1979, 44, NO 14, 2518-2522