Let¡¯s face it, organic chemistry can seem difficult to learn. Especially from a beginner¡¯s point of view. Like 96556-05-7, Name is 1,4,7-Trimethyl-1,4,7-triazonane. In a document, author is Du, Shunfu, introducing its new discovery. Application In Synthesis of 1,4,7-Trimethyl-1,4,7-triazonane.
A Straightforward Strategy for Constructing Zirconium Metallocavitands
Metallocavitands (MCs), a new burgeoning class of functional multimetallic molecules with specific cavities, are considered as promising materials in many fields. However, designing and constructing metallocavitands with compatibility and tunability from simple ligands is highly challenging. In this work, a series of Zr-based MCs with three distinct structural types have been prepared based on in situ generated trinuclear zirconocene (Cp3Zr3) secondary building blocks (SBBs) and V-shaped dicarboxylic linkers. First, a novel window-shaped Zr-based MC, namely ZrMC-1, has been constructed based on four Cp3Zr3 SBBs and six simple isophthalate linkers. Its window size and environment could be easily modified by different functional groups, including nitro (-NO2) and amino (-NH2). Interestingly, the amino-functionalized one, ZrMC-1-NH2, can serve as a robust heterogeneous cascade catalyst to effectively catalyze the one-pot tandem deacetalizationKnoevenagel condensation reactions. Second, with the introduction of a sulfonic (-SO3H) group, an unprecedented bowel-like Zr-based MC, namely ZrMC-2, comprising three Cp3Zr3 SBBs and four 5-sulfoisophthalate ligands, has been obtained. Unexpectedly, one sulfonic group of the ligand coordinates to the Cp3Zr3 SBB, forming the base of ZrMC-2. Finally, an unexpected zigzag-shaped MC denoted as ZrMC-3 has been prepared by using 2,5-thiophenedicarboxylic acids, featuring a larger bend angle than that of the isophthalate-type one. Specifically, ZrMC-3 contains two Zr-based prisms with three Cp3Zr3 SBBs and four 2,5-thiophenedicarboxylate linkers; the bottoms of these two prisms are bridged by another 2,5-thiophenedicarboxylate linker. These results highly suggest that Cp3Zr3 can be an excellent SBB to construct MCs with fascinating architectures and properties by merely varying the organic linkers.
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Reference:
Metal catalyst and ligand design,
,Ligand Template Strategies for Catalyst Encapsulation – NCBI