Ever since the discovery of enantioselective organocatalytic Michael addition reactions, it has emerged as a significant path for synthesizing a variety of stereochemical products under mild conditions, also a prominent C−X (X=C, O, N, S) bond formation reaction in organic chemistry. Over time, substantial progress has been accomplished in diversity‐ and target‐ oriented asymmetric Michael addition reactions. This review provides a brief overview of the results, scope, and limitations of several influential strategies involving enantio‐selective Michael addition reactions promoted by mono‐functional proline/prolinol/supported‐proline‐based chiral organocatalysts. Furthermore, we also sincerely believe that the various synthetic strategies documented in this review will pave a pathway to improve the status of Michael addition reactions for synthesizing various drug molecules involving complex intermediates.

Herein, we have developed a novel synthetic route for the synthesis of chromeno [4,3-d]pyrido [1,2-a]pyrimidin-6-one derivatives 8a-q using an acid ionic liquid [CMMIM][BF 4− ] 4 via one-pot, three-component synthesis in aqueous ethanol at room temperature. A series of 17 derivatives have been successfully prepared with up to 93% yield. All the synthesized derivatives were well characterized using 1 H-NMR, 13 C-NMR, and FT-IR spectral techniques. Additionally, the photophysical properties of 12 selected derivatives including molar extinction coefficient (ε), Stokes shift (Δυ ̅ ), and quantum yield (Φ) varying from 0.52095 × 10 4 to 0.93248 × 10 4 , 4216 to 4668 cm −1 , and 0.0088 to 0.0459, respectively, have been determined. Furthermore, the experimental data are supported by density functional theory (DFT) and time-dependent DFT calculations. Theoretical investigations showed a trend similar to experimental results.

Herein, we report a novel synthetic pathway for synthesizing bis‐coumarins using 5 mol% [BCMIM][Cl] ionic liquid via the facile, one‐pot, metal‐free synthesis in aqueous ethanol at room temperature. A series of 24 derivatives were furnished in up to 94% yields in 15 min to 1.5 h and were characterized using different spectroscopic techniques. The photophysical properties of bis‐coumarin derivatives were explored through UV‐Visible and fluorescence spectroscopy. The absorption and emission spectra demonstrate a peak wavelength (λmax), within the range of 297–311 nm and 486–505 nm, respectively. An analogous pattern to the experimental results is seen in density functional calculations. The binding affinities of all the synthesised derivatives with Bovine Serum Albumin (BSA) were determined using AutoDock Vina which exhibited a range from −8.4 to −11.5 kcal mol−1. The computed binding constant (KBSA) by tryptophan (Trp) emission quenching values illustrate strong binding interactions of the selected ligands in the order of 104. The calculated binding affinities were validated by performing molecular dynamics simulations of the best docking pose using GROMACS software over a period of 1 ns for studying the stability of protein‐ligand complexes.