Rapid one-pot catalytic synthesis of double-capped oligoesters from lactones

Piromjitpong, Parichat; Kiriratnikom, Jiraya; Ungpittagul, Thasanaporn; Yotphan, Sirilata; Phomphrai, Khamphee

doi:10.1016/j.apcata.2017.09.033

Cited by 4 publications

(2 citation statements)

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“…Galia and co‐workers studied the ROP of CL using wet β‐cyclodextrin as a novel catalyst. Similarly, other catalysts such as ammoniumheptamolypdate, cyclic trimeric phosphazene base, phosphoricacid, rare earth Schiff base complex, silica compound, zinc complex, and functionalized aluminum alkoxide were used as a catalyst for the ROP of CL. In order to initiate the ROP of CL, various initiators are used.…”

Section: Introductionmentioning

confidence: 99%

Low temperature splinting activity and catalytic behavior of nano Ag doped sulphamicacid bridged diblock copolymer

Anbarasan

Jeyapriya²,

Meenarathi³

et al. 2018

Polymers for Advanced Techs

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A novel silver nanoparticle doped diblock copolymer was synthesized by a 3‐step process via bulk polymerization process under nitrogen atmosphere. The above prepared polymer is characterized by FTIR spectroscopy, fluorescence emission spectroscopy, circular dichroism (CD), HRTEM, and FESEM. The sulphamicacid end capped poly(ε‐caprolactone) (P1) system exhibited higher tensile strength than the sulphamicacid bridged diblock copolymer (P2) and nano Ag doped sulphamicacid bridged diblock copolymer (P3) systems. The splinting activity of the diblock copolymers was tested and confirmed the low temperature splinting activity of the diblock copolymer. The Ag nanoparticle catalyzed catalytic reduction of p‐nitrophenol (NiP) was tested, and the apparent rate constant (kapp) was determined as 7.36 × 10−3 sec−1. The thermal studies were carried out by DSC and TGA methods. The TGA study declared that the P1 system has higher degradation temperature than the P2 and P3 systems. The P1 system has higher melting temperature (Tm) (75.5°C) than the P2 and P3 systems. The CD study indicated that the conformation of sulphamicacid was not changed even after the formation of nano Ag doped sulphamicacid bridged diblock copolymer.

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Section: Introductionmentioning

confidence: 99%

Low temperature splinting activity and catalytic behavior of nano Ag doped sulphamicacid bridged diblock copolymer

Anbarasan

Jeyapriya²,

Meenarathi³

et al. 2018

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…11 It is very interesting to note that if the alcohols were replaced by simple alkyl esters, double-capped oligoesters having alkyl esters at both chain ends could be synthesized in one step. 12 A tetrahedral aminephenolate magnesium( ii ) catalyst was reported for the alcoholysis of LA giving alkyl ( S , S )-lactyllactates (ALL) or alkyl ( S )-lactates (AL) once LA was completely consumed. 13 Solid calcium oxide was also effective for the methanolysis of LA giving 90% yields of MLL in dichloromethane (DCM).…”

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confidence: 99%