Covalently Bonded PIDA on SBA‐15 as Robust Pd Support: Water‐Tolerant Designed Catalysts for Aqueous Suzuki Couplings

Abstract

In this work, a new catalyst based on Pd (II) supported SBA‐15 has been has been introduced and discussed. The designed catalyst was characterised by Scanning electron microscopy (SEM), transmission electron microscopy (TEM), FT‐IR, BET surface area analysis, thermo gravimetric analysis (TGA), Energy‐dispersive X‐ray spectroscopy (EDS) and atomic absorption spectroscopy (AAS) analyses. For the first time, lobster‐like N‐propyliminodiacetate (PIDA) has been incorporated as ligand onto SBA‐15 to form a stable complex with Pd ions to design a highly active, stable and reusable catalyst for Suzuki‐Miyaura couplings.

Synthesis of magnetic nanoparticles with an IDA or TED modified surface for purification and immobilization of poly-histidine tagged proteins

“…TED-propyl-silane and IDA-propyl-silane were synthesized based on the reaction of amino groups on AAPTMS and APTES with sodium chloroacetate, respectively. [35][36][37][38] Typically, 0.822 mL AAPTMS or 0.842 mL APTES were dripped into 25 mL deionized water with magnetic stirring and on ice water bath for 1 hour. Then 1.68 g or 1.26 g sodium chloroacetate was added and reacted at 80 C for 7 hours.…”

Functionalized Silicas for Metal‐Free and Metal‐Based Catalytic Applications: A Review in Perspective of Green Chemistry

“…With the use of 4‐aminoethylpiperidine during the sequential alkylations with cyanuric chloride, the grafting of organic dendrite molecules on silica is achieved . Sodium chloroacetate has been also used for the N‐alkylation with aromatic FS Different to the above reports, research group of S. M. Sadeghzadeh has carried out the nucleophilic substitution on eight chlorine sites of chloropropyloctasilsesquioxane using APTES and successively, the obtained product is anchored on silica …”

Applications of SBA-15 supported Pd metal catalysts as nanoreactors in C–C coupling reactions

“…A schematic pathway of the synthetic process is illustrated in Scheme 64. 102 The catalytic activity of Pd@SBA-15/PIDA (48) was monitored in S-M reaction of aryl halides with a wide various phenylboronic acids using K 2 CO 3 as the base at 80 C under aqueous conditions (Scheme 65). The SEM images of the catalyst conrmed a clear rod-like morphology and TEM spectra also showed the preserved long range order of SBA-15 aer functionalization.…”

“…Aer 15 runs the TON of the reaction was 1309 that was indicated no noticeable leaching of Pd. 102 In 2018, Ulusal and her group, introduced a well-dispersed green Pd/SBA-15 (49) nanocatalyst through scCO 2 deposition approach by H 2 -assisted chemical reduction. 103 For this purpose, Pd(II) complex of 2,2 0 -bipyridyl was used as a precursor for preparation of SBA-15-supported Pd NPs.…”