A simple and green synthetic method for preparation of functionalized indol-3-yl pyran derivatives was developed. The reactions were carried out by one-pot three-component synthesis of 3-cyanoacetyl indoles, malononitrile/cyanoacetate and various aldehydes/isatins/acenaphthenequinone in the presence of catalytic amount of l-proline. The advantages of this method included straightforward processing
HAp‐encapsulated γ‐Fe
<sub>2</sub>
O
<sub>3</sub>
‐supported dual acidic heterogeneous catalyst for highly efficient one‐pot synthesis of benzoxanthenones and 3‐pyranylindoles
A novel method is reported for the synthesis of benzoxanthenone and 3‐pyranylindole derivatives via one‐pot three‐component reactions using a newly synthesized HAp‐encapsulated γ‐Fe2O3‐supported dual acidic heterogeneous catalyst, as a reusable and highly efficient nanocatalyst. In this protocol the use of the nanocatalyst provided a green, useful and rapid method to generate products in short reaction
A simple and convenient method for the one-pot three-component synthesis of 3-pyranyl indoles has been accomplished by tandem Knoevenagel–Michael reaction of 3-cyanoacetyl indole, various aromatic aldehydes and malononitrile catalyzed by InCl3 in ethanol under reflux conditions. The newly synthesized 3-pyranyl indoles were evaluated for anti-microbial, antioxidant, and anticancer activities. Some of