3261-87-8Relevant articles and documents
Light-activated drug release from prodrug nanoassemblies by structure destruction
Li, Yang,Wang, Shujuan,Huang, Yulan,Chen, Yuwen,Wu, Wenbi,Liu, Yu,Zhang, Jing,Feng, Yue,Jiang, Xian,Gou, Maling
, p. 13128 - 13131 (2019)
We report here a novel light-triggered nanosystem based on co-assembling nanoaggregates (NAs) of lipophilic photosensitizers and lipophilic prodrugs containing multiple thioethers. Upon laser irradiation, the oxidization of the multiple thioethers by photosensitizer-generated singlet oxygen could rapidly destroy the NA structure, resulting in faster drug release than those containing a single thioether.
Preparation method of thioglycolic anhydride
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Paragraph 0037-0052; 0060-0065, (2020/12/10)
The invention discloses a preparation method of thioglycolic anhydride. The method comprises the following steps of: vaporization of trifluoroacetic anhydride: vaporizing trifluoroacetic anhydride ina vaporizing device for later use; synthesis of thioglycolic anhydride: preheating the interior of a suspended gas-solid reaction device to 45-65 DEG C, introducing the vaporized trifluoroacetic anhydride into the suspended-state gas-solid reaction device, intermittently adding thionyl diacetic acid from the top of the suspended-state gas-solid reaction device, reacting for 2 hours, stopping introducing the vaporized trifluoroacetic anhydride from a gas inlet, stopping heating, and leading out an obtained solid product from a discharging port; and purification of thioglycolic anhydride: washing the solid product with refrigerated anhydrous petroleum ether and anhydrous ether respectively to obtain pure thioglycolic anhydride. The thioglycolic anhydride synthesized by the method is high inpurity and high in yield; and the yield of erdosteine prepared by reacting the thioglycolic anhydride serving as a raw material with homocysteine thiolactone hydrochloride is high.
Efficient cyclodehydration of dicarboxylic acids with oxalyl chloride
Kantin, Grigory,Chupakhin, Evgeny,Dar'in, Dmitry,Krasavin, Mikhail
supporting information, p. 3160 - 3163 (2017/07/18)
Literature examples illustrating the use of oxalyl chloride to prepare dicarboxylic acid anhydrides are surprisingly limited. At the same time, we have discovered a method involving the use of this readily available reagent which allowed the preparation of novel cyclic anhydrides where other, more conventional, methods had failed. Herein, we demonstrate that the method is applicable to a wide diversity of substrates, delivers good to excellent yields of cyclic anhydrides without chromatographic purification and can be considered a synthetic tool of choice whenever dicarboxylic acid cyclodehydration is required.
