Friedländer, Knoevenagel, and Michael Reactions Employing the Same MOF: Synthesis, Structure, and Heterogeneous Catalytic Studies of ([Zn(1,4-NDCA)(3-BPDB)_0.5]·(DMF)(MeOH) and [Cd₄(1,4-NDCA)₄(3-BPDB)₄]·2(DMF)

Abstract

Friedlander, Knoevenagel, and Michael Reactions Employing the Same MOF: Synthesis, Structure, and Heterogeneous Catalytic Studies of ([Zn(1,4-NDCA)(3-BPDB) 0.5 ]•(DMF)(MeOH) and [Cd 4 (1,4-NDCA) 4 (3-BPDB) 4 ]•2(DMF) Published as part of The Journal of Physical Chemistry virtual special issue "Kankan Bhattacharyya Festschrift".

Fluorine-Functionalized NbO-Type {Cu2}-Organic Framework: Enhanced Catalytic Performance on the Cycloaddition Reaction of CO2 with Epoxides and Deacetalization-Knoevenagel Condensation

“…By contrast, electron-donating groups such as −OCH 3 could effectively hinder the reaction (entries 3–5). The substrate of p -(4-methylphenoxy)­benzaldehyde dimethyl acetal gave a obviously lower conversion (88%, entry 6), which should be attributed to the fact that the large substituent greatly affected the mass transfer of the whole molecule in the pores (Table S5), consistent with related reported MOF-based catalysts. − The 1 H NMR spectra of all the above tandem deacetalization-Knoevenagel condensation products could be found in Figures S16–S22. All in all, this series of catalytic experiments demonstrated that NUC-54a was a highly promising bifunctional catalyst for deacetalization-Knoevenagel condensations with satisfactory product yield and high selectivity. − …”

Sequential Assembly and Stabilization of Cu6S6 Octahedral Clusters in NaCl-, NiAs-, and CdI2-Related Structures and Their Utility toward Thermochromism and Multicomponent Hantzsch Reaction

“…The α-Po structure is common in many MOF structures (Figure 3). 8,[13][14][15][16][17]73 For the topological analysis, the Mn(1) dimers and Cu 6 S 6 units were considered as two distinct nodes. The connectivity between the Mn(1) dimers and Cu 6 S 6 units gives rise to a uninodal net with a α-Po topology.…”

“…34,64−69 In our earlier efforts by employing compounds having Cu 6 S 6 clusters and other building units, we have explored catalytic reactions that utilize both the Lewis acidic as well as basic sites. 30,73 In the present study, we have attempted a multicomponent Hantzsch reaction (Scheme 3). For this, aromatic aldehyde, ethyl acetoacetate, indandione, and ammonium For undertaking the catalytic reaction, the needed reaction conditions and parameters were first optimized.…”

“…Typically, in a 10 mL test tube, 2 mL of the [Cu 6 (2-Hmna) 6 ] metalloligand (0.1 mmol) was solubilized using ammonia solution, then 2 mL of 1:1 water/ethanol mixture containing 0.1 mmol of ethylenediamine ( en ) was carefully layered on top, and finally, a solution of manganese chloride tetrahydrate (0.1 mmol) in 2 mL of ethanol was introduced as the top layer (Scheme ). The test tube containing a layered solution was carefully sealed with a screw cap, and the reaction vessel was kept for 6 days at 60 °C, which yielded yellow-colored crystals (yield: 51% based on Mn). ,− A similar synthesis procedure was followed for the preparation of all of the other compounds (Table S1).…”

Multistep Cascade Catalytic Reactions Employing Bifunctional Framework Compounds

“…This approach would make the overall reaction simpler and cost-effective. The important criterion for developing a catalyst that can favor a cascade/tandem reaction is to have multifunctionality within the same catalyst. − In addition, it is preferable to have such multifunctional catalytic centers that are separated spatially. Such an arrangement would help to reduce any undesirable interactions between the reacting chemical species and help in the formation of the final product.…”