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3 protocols using hexadecyl isocyanate

1

Synthesis and Evaluation of PEG-Modified Nanocarrier

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PEG2k-NH2 was purchased from Xiamen SINOPEG Biotechnology Co., Ltd. (Xiamen, China). Methylene chloride, dimethyl sulfoxide (DMSO), N, N-dimethylformamide (DMF), dichloromethane (DCM), trichloromethane (TCM), diethyl ether, and hydrogen peroxide were purchased from Sinopharm Group Chemical Reagent Co., Ltd. (Shanghai, China). Succinic anhydride 1-ethyl-3(3-dimethylpropylamine) (EDCI) was offered by Beijing Bailingwei Technology Co., Ltd. (Beijing, China). Hexadecyl isocyanate and MTT were obtained from Sigma-Aldrich (Shanghai) Trading Co., Ltd. (Shanghai, China). Carboplatin was obtained from Shandong Boyuan Pharmaceutical Co., Ltd. (Jinan, China). St. Nile red and phosphotungstic acid were purchased from Sinopharm Group Chemical Reagent Co., Ltd. (Shanghai, China). RPMI1640 culture medium and newborn fetal bovine serum were obtained from GIBCO Biotechnology Co., Ltd. (Carlsbad, CA). H460, A549 tumor cell lines were obtained from the Institute of Basic Medicine, Chinese Academy of Medical Sciences (Beijing, China). SPF balb/c/nu/nu nude mice were provided by Viton Lihua.
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2

Synthesis of Organic Compounds

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Hexadecyl chloroformate (96%), hexadecyl isocyanate (97%), N, N-dimethylethylenediamine (99%), ethanolamine (99%), 2-aminophenol (99%), 1,2-phenylenediamine (99%), palladium on carbon (10 wt%), hydroxylamine hydrochloride (99%), and vanillin (99%) were purchased from Sigma-Aldrich (Burlington, MA, USA) and used without further purification. Dichloromethane, ethyl acetate, hexane, acetone and ethyl alcohol were reagent grade from Alveg (Tlalnepantla de Baz, Mexico).
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3

Dexamethasone Palmitate Nanoparticle Synthesis

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Palmitoyl chloride, dexamethasone, hexadecyl isocyanate, anhydrous dichloromethane, and triethyl amine were purchased from Sigma Aldrich (France). Hexadecyl chloroformate was obtained from Tokyo Chemical Industry, Co. LT (Japan). LDC1, LDC2, and LDC3 were synthesized as described below. DSPE-PEG 2000 was obtained from Avanti Polar Lipids, Inc. (USA). MilliQ reference system from Millipore (France) was used to purify water. Chloroform HPLC-grade (Carlo Erba Reagents, France), methanol, and acetonitrile HPLC-grade (VWR Chemicals, France) were used. NMR spectra were recorded on Bruker Avance-NMR (300, and 400 MHz) spectrometers in CDCl 3 . ESI-MS of compounds were measured on Thermofisher Scientific (LTQ, ion trap, H-ESI II). All experiments were performed in amber vials due to the photosensitivity of dexamethasone palmitate [28] (link)
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