Thiourea-functionalized magnetic hydroxyapatite as a recyclable inorganic–organic hybrid nanocatalyst for conjugate hydrocyanation of chalcones with TMSCN

Recent developments of metallic nanoparticles and their catalytic activity in organic reactions

“…APTES/IMMPh@Ni 2+ NP [57] S C H E M E 9 (a) Illustration of ADH that immobilized on the Fe 3 O 4 @SiO 2 -Epoxy NPs and (b) reduction of PGA to (R)-MA in the presence of Fe 3 O 4 @SiO 2 -GPS-ADH NPs [64] based on magnetic Fe-NPs. [67] In order to synthesize this nanocatalyst, the first reaction of N-(3,5-bistrifluoromethylphenyl)isothiocyanate) with trimethylsilyloxypropyl amine is to form the organosilane I. Secondly, magnetic hydroxyapatite (mHAp) was prepared by covalent anchoring of 1-(3,5bis[trifluoromethyl]phenyl)-3-propyl)thiourea on Fe 3 O 4 -NP. Then the synthesized organosilane I was grafted onto the surface of mHAp to synthesize thiourea functionalized mHAp as a magnetic thiourea-based inorganic-organic hybrid material.…”

DDQ-mediated direct cross-dehydrogenative-coupling (CDC) reaction of thiols with isochroman: A serendipitous metal-free route to C-S bond formation

“…Carbon-sulfur bond formation is one of the main topics among methodologist in organic synthesis 1,2 in terms of preparation many sulfur-containing natural and pharmaceutical products, which reveal potent antibiotic, antimicrobial, analgesic, anti-in ammatory, antipsychotic, anti-HIV, and anti-tumor activities [3][4][5][6] . Michael addition of a thiol as a nucleophile, to an acceptor such as activated alkene or alkyne by an electron-withdrawing group (e.g., ketone, ester, amide, nitrile, nitro, sulfonate, or phosphonate), results in one of the most e cient C-S bond-forming strategies in synthetic organic chemistry 7 . Besides, Xinping and Jimmy utilized the direct displacement of alcohols with sulfur nucleophiles in carbon − sulfur bond formation 8 .…”

Preparation of N,S-codoped magnetic bagasse biochar and adsorption characteristics for tetracycline

“…25 Many studies have shown that thiourea modication can improve the adsorption properties of biochar for many pollutants. [26][27][28] Wei Mao et al, 29 used thiourea to introduce N-S elements to the surface of corn stalk biochar, the adsorption performance of ciprooxacin and Cr was improved greatly. Therefore, thiourea can be a potential modier for preparation of high-performance magnetic biochar.…”