Air-stable titanocene bis(perfluorooctanesulfonate) as a new catalyst for acylation of alcohols, phenols, thiols, and amines under solvent-free condition

Magnetically separable γ-Fe2O3 nanoparticles: An efficient catalyst for acylation of alcohols, phenols, and amines using sonication energy under solvent free condition

“…These protocols use support to increase the catalytic activity, but our protocol provides good catalytic activity without using any support. It further uses sonication energy at Literature survey reveals that acylation reactions of phenols, alcohols and amines have been carried out using various catalysts such as modified Y zeolites [50], amorphous carbon-silica composites bearing sulfonic acid [51], poly(N-vinylimidazole) [52], sulfonic acid [53], titanocene bis(perfluorooctanesulfonate) [54], RuCl 3 in [bmim][PF 6 ] ionic liquid [55] 4-(N,Ndimethylamino)pyridine hydrochloride [56], NaCo(CO) 4 [57], Ac 2 O-Py/Al 2 O 3 [58], FeCl 2 [59], cobalt(II) salen complex [60], ZnAl 2 O 4 @SiO 2 nanocomposite [61], BiFeO 3 [62], anhydrous NiCl 2 [63], thallium(III) chloride [64], ErCl 3 [65], Gd(OTf) 2 [66], Cu(OTf) 2 [67] and nano CdO [68]. Most of these protocols have several disadvantages like use of additives and surfactants, requirement of co-catalysts, longer reaction times, high catalyst loading and use of homogenous catalysts.…”

Synthesis and structure of an air-stable organoantimony complex and its use as a catalyst for direct diastereoselective Mannich reactions in water

“…We have researched on organometallic compounds and found that the incorporation of perfluoroalkylsulfonate, perfluoroarylsulfonate or perchlorate groups into organometallic complexes can result in enhanced acidity critical for the improvement of catalytic activity [14,[32][33][34][35][36][37][38]. In view of the stability of the tetrahydrodibenzo[c,f] [1,5]azastibocine cyclic framework [27] and to study the potential applications of organoantimony compounds in catalysis, we adopted 5,6,7,12-tetrahydrodibenzo[c,f] [1,5]azastibocine for the synthesis of organoantimony complex [C 6 H 11 N(CH 2 C 6 H 4 ) 2 SbOSO 2 CF 3 ] 1.…”

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“…Titanocene bis(perfluorooctanesulfonate) [Cp 2 Ti(OSO 2 C 8 F 17 ) 2 ] in the absence of solvent is also tremendous and popular system to synthesize esters, thioesters and amines in excellent yields (Scheme 20). 68 Silver triflate catalysis under solvent-free conditions was accomplished to achieve the one-pot synthesis of esters, thioesters and amines (Scheme 21). This protocol is an improvement on the existing protocol Nanoparticles are one of the most interesting and efficient reagents in chemistry science in particular organic synthesis.…”