Direct synthesis of benzo[a]carbazoles by palladium-catalyzed domino reactions: synthesis and photophysical properties of diverse benzo[a]carbazoles

Abstract

compounds evaluated in this study were found to emit purple to blue light in the visible region. Some interesting structure-property correlations are also described.

Ultrasound-promoted green approach for the synthesis of multisubstituted pyridines using stable and reusable SBA-15@ADMPT/H5PW10V2O40nanocatalyst at room temperature

“…Thus, the development of an eco-friendly and practical synthetic route for the efficient preparation of these pyridine derivatives will be a beneficial and interesting challenge. As part of our ongoing research program on the development of efficient methods for the preparation of biologically active compounds (43)(44)(45)(46)(47)(48), herein, we are going to report an efficient method for the synthesis of 2-amino-3-cyanopyridins under ultrasound waves. In this approach, the SBA-15@ADMPT/H 5 PW 10 V 2 O 40 was used as a highly efficient catalyst for the synthesis of highly substituted pyridines 3 via one-pot, four-component condensation reaction of aromatic aldehydes 1, cyclic ketones 2, ammonium acetate, and malononitrile at room temperature under ultrasound irradiation (Scheme 1).…”

Hauser‐Kraus Annulation Initiated Multi‐Cascade Reactions for Facile Access to Functionalized and Fused Oxazepines, Carbazoles and Phenanthridinediones

“…[18] However, the recent synthetic methods for carbazole synthesis can be seen through photocatalysis, [19] base promoted (Scheme 1a-ii) [20] and metalcatalyzed reactions. [21,22] However, all these methods are mainly known for the construction of C-ring in benzo[a]carbazole.…”

“…The second strategy involves the construction of an aromatic ring onto a functionalized indole by the Diels‐Alder reaction [18] . However, the recent synthetic methods for carbazole synthesis can be seen through photocatalysis, [19] base promoted (Scheme 1a–ii) [20] and metal‐catalyzed reactions [21,22] . However, all these methods are mainly known for the construction of C‐ring in benzo[ a ]carbazole.…”

Fe3O4@SiO2@ADMPT/H6P2W18O62: a novel Wells–Dawson heteropolyacid-based magnetic inorganic–organic nanohybrid material as potent Lewis acid catalyst for the efficient synthesis of 1,4-dihydopyridines

“…As part of our current studies on the development of efficient methods for the preparation of biologically active compounds (36)(37)(38)(39)(40)(41)(42)(43)(44), in this paper, Fe 3 O 4 @SiO 2 @ADMPT/H 6 P 2 W 18 O 62 as a new inorganic-organic hybrid nanocatalyst was prepared, characterized, and used as an effective catalyst in the synthesis of 1,4-DHPs 4 via one-pot reaction of various aromatic aldehydes 1, ethyl acetoacetate 2, and ammonium acetate 3 with good to high yield in ethanol (Scheme 1). To the best of our knowledge, there are no examples of the use of WD HPAs as the catalyst for the synthesis of 1,4-DHP derivatives.…”