- Thermoset elastomers derived from carvomenthide
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Renewable thermoset elastomers were prepared using the plant-based monomer carvomenthide. Controlled ring-opening transesteri fication polymerization of carvomenthide using diethylene glycol as an initiator gave α,ω-dihydroxyl poly(carvomenthide) (HO-PCM-OH), which was subsequently converted to carboxy-telechelic poly-(carvomenthide) (HOOC-PCM-COOH) by esterification with excess succinic anhydride through a one-pot, two-step process, leading to no crystallinity, high viscosity, strong thermal resistance, and low glass transition temperature of the resulting functionalized polyester. Thermal curing processes of the resulting 3, 6, and 12 kg mol-1 prepolymers were achieved with trifunctional aziridine to give cross-linked PCM elastomers. The thermal properties, mechanical behavior, and biocompatibility of the rubbery thermoset products were investigated by differential scanning calorimetry, thermal gravimetric analysis, dynamic mechanical analysis, tensile tests under static and cyclic loads, and cell adherence. These new materials are useful candidates to satisfy the design objective for the engineering of a variety of soft tissues. (Figure Presented).
- Yang, Jinyoung,Lee, Sangjun,Choi, Woo Jin,Seo, Howon,Kim, Pilhan,Kim, Geon-Joong,Kim, Young-Wun,Shin, Jihoon
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Read Online
- Platinum Nanoparticles Stabilized by Glycerodendrimers: Synthesis and Application to the Hydrogenation of α,β-Unsaturated Ketones under Mild Conditions
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Air-stable platinum nanoparticles stabilized by glycerodendrimers were prepared in water and analyzed by TEM. These platinum nanoparticles showed good catalytic activity for the reduction of α,β-unsaturated ketones to saturated ketones at room temperature in water or in water/THF (1:1) under H2 (101.3 kPa). The catalytic species was recovered and recycled several times.
- Menot, Bérengère,Salmon, Lionel,Bouquillon, Sandrine
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supporting information
p. 4518 - 4523
(2015/10/06)
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- First total syntheses of bicyclic marine sesquiterpenoids drechslerines A and B
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The first total syntheses of the bicyclic sesquiterpenoids drechslerines A (1) and B (2), which were isolated from the algicolous fungus Drechslera dematioidea in the marine red alga Liagora viscida, has been accomplished starting from (S)-carvone (13) via three palladium-catalyzed reactions, namely, diastereoselective allylation, conjugate reduction, and carbon monoxide insertion, as the key reactions.
- Hagiwara, Hisahiro,Fukushima, Masakazu,Kinugawa, Kimihiko,Matsui, Takuya,Hoshi, Takashi,Suzuki, Toshio
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experimental part
p. 4061 - 4068
(2011/06/27)
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- A convenient preparation of 3-isopropyl-1-methylcyclopentylmethanol and 1-isopropyl-3-methylcyclopentylmethanol via Favorskii rearrangement
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The Favorskii rearrangement of suitable α-chloro derivatives of commercially available (+)- and (-)-carvone, and (-)-menthone served efficiently to prepare the title compounds featuring delicious fruity, floral olfactory notes.
- Ambrosini, Martino,Baricordi, Nikla,Benetti, Simonetta,De Risi, Carmela,Pollini, Gian P.,Zanirato, Vinicio
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scheme or table
p. 2145 - 2148
(2010/03/03)
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- Asymmetric hydrolysis of α-alkylated cyclohexanone enol acetates by the cultured cells of Marchantia polymorpha
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The cultured suspension cells of Marchantia polymorpha hydrolyzed cyclohexanone enol acetates with 2-alkyl groups to afford optically active ketones. The stereoselectivity of the protonation of the enol intermediate was reversed when the chain length of alkyl substituents was increased.
- Hirata, Toshifumi,Shimoda, Kei,Ohba, Daisuke,Furuya, Noriko,Izumi, Shunsuke
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p. 2671 - 2673
(2007/10/03)
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