Day: October 13, 2022

In 2019,Journal of the American Chemical Society included an article by Kornfilt, David J. P.; MacMillan, David W. C.. SDS of cas: 25637-16-5. The article was titled 《Copper-Catalyzed Trifluoromethylation of Alkyl Bromides》. The information in the text is summarized as follows:

Copper oxidative addition into organohalides is a challenging two-electron process. In contrast, formal oxidative addition of copper to Csp2 carbon-bromine bonds can be accomplished by employing latent silyl radicals under photoredox conditions. This novel paradigm for copper oxidative addition has now been applied to a Cu-catalyzed cross-coupling of Csp3-bromides. Specifically, a copper/photoredox dual catalytic system for the coupling of alkyl bromides with trifluoromethyl groups is presented. This operationally simple and robust protocol successfully converts a variety of alkyl, allyl, benzyl, and heterobenzyl bromides into the corresponding alkyl trifluoromethanes. In the experiment, the researchers used many compounds, for example, 4-Bromotetrahydropyran(cas: 25637-16-5SDS of cas: 25637-16-5)

4-Bromotetrahydropyran(cas: 25637-16-5) is often used as reactant for: nickel-catalyzed alkyl-alkyl Suzuki coupling reactions with boron reagents, preparation of a selective small-molecule melanocortin-4 receptor agonist with efficacy in a pilot study of sexual dysfunction in humans; preparation of aliphatic hydrocarbons via nickel-catalyzed Suzuki cross-coupling with alkylboranes.SDS of cas: 25637-16-5

Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

《Terminal-oxidant-free photocatalytic C-H alkylations of heteroarenes with alkylsilicates as alkyl radical precursors》 was written by Ikarashi, Gun; Morofuji, Tatsuya; Kano, Naokazu. SDS of cas: 25637-16-5 And the article was included in Chemical Communications (Cambridge, United Kingdom) in 2020. The article conveys some information:

The authors report the photocatalytic C-H alkylations of heteroarenes with alkylsilicates bearing C,O-bidentate ligands under acidic conditions. Irradiation of heteroaromatics in the presence of the silicates and HO2CCF3 produced the corresponding alkylated compounds The present reaction system does not require any terminal oxidant although the reaction seems to be a formal oxidation reaction. Alkylsilicates can be used in photocatalytic radical chem. under acidic conditions. In addition to this study using 4-Bromotetrahydropyran, there are many other studies that have used 4-Bromotetrahydropyran(cas: 25637-16-5SDS of cas: 25637-16-5) was used in this study.

4-Bromotetrahydropyran(cas: 25637-16-5) is often used as reactant for: preparation of anthranilic acids as antibacterial agents with human serum albumin binding affinity; preparation of antiatherogenic antioxidant di-tert-butyldihydrobenzofuranols via Grignard reactions with di-tert-butyl(hydroxy)benzaldehyde derivatives; synthesis of gephyrotoxin via the Schmidt reaction.SDS of cas: 25637-16-5

Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Formula: C5H9BrOIn 2017 ,《Synthesis of NH-sulfoximines from sulfides by chemoselective one-pot N- and O-transfers》 was published in Chemical Communications (Cambridge, United Kingdom). The article was written by Tota, Arianna; Zenzola, Marina; Chawner, Stephen J.; John-Campbell, Sahra St; Carlucci, Claudia; Romanazzi, Giuseppe; Degennaro, Leonardo; Bull, James A.; Luisi, Renzo. The article contains the following contents:

Direct synthesis of NH-sulfoximines from sulfides were achieved through O and NH transfer in the same reaction, occurring with complete selectivity. The reaction was mediated by bisacetoxyiodobenzene under simple conditions and employs inexpensive N-sources. Preliminary studies indicated that NH-transfer was likely to be first, followed by oxidation, but the reaction proceedes successfully in either order. A wide range of functional groups and biol. relevant compounds were tolerated. The use of AcO15NH4 affords 15N-labeled compounds The experimental process involved the reaction of 4-Bromotetrahydropyran(cas: 25637-16-5Formula: C5H9BrO)

4-Bromotetrahydropyran(cas: 25637-16-5) is often used as reactant for: preparation of anthranilic acids as antibacterial agents with human serum albumin binding affinity; preparation of antiatherogenic antioxidant di-tert-butyldihydrobenzofuranols via Grignard reactions with di-tert-butyl(hydroxy)benzaldehyde derivatives; synthesis of gephyrotoxin via the Schmidt reaction.Formula: C5H9BrO

Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Safety of (2-Hydroxypropyl)-β-cyclodextrinIn 2020 ,《Advantages of the combined use of cyclodextrins and nanocarriers in drug delivery: A review》 appeared in International Journal of Pharmaceutics (Amsterdam, Netherlands). The author of the article were Mura, Paola. The article conveys some information:

A review. Complexation with cyclodextrins (CDs) has been widely and successfully used in pharmaceutical field, mainly for enhancing solubility, stability and bioavailability of a variety of drugs. However, some important drawbacks, including rapid removal from the bloodstream after in vivo administration, or possible replacement, in biol. media, of the entrapped drug moieties by other mols. with higher affinity for the CD cavity, can limit the CDs effectiveness as drug carriers. This review is focused on combined strategies simultaneously exploiting CD complexation, and loading of the complexed drug into various colloidal carriers (liposomes, niosomes, polymeric nanoparticles, lipid nanoparticles, nanoemulsions, micelles) which have been investigated as a possible means for circumventing the problems associated with both such carriers, when used sep., and join their relative benefits in a unique delivery system. Several examples of applications have been reported, to illustrate the possible advantages achievable by such a dual strategy, depending on the CD-nanocarrier combination, and mainly resulting in enhanced performance of the delivery system and improved biopharmaceutical properties and therapeutic efficacy of drugs. The major problems and/or drawbacks found in the development of such systems, as well as the (rare) case of failures in achieving the expected improvements have also been highlighted. In the experiment, the researchers used (2-Hydroxypropyl)-β-cyclodextrin(cas: 128446-35-5Safety of (2-Hydroxypropyl)-β-cyclodextrin)

(2-Hydroxypropyl)-β-cyclodextrin(cas: 128446-35-5) belongs to tetrahydropyrans. Tetrahydropyrans and furans principally constitute as a central motif in diverse medicinally privileged molecules.Safety of (2-Hydroxypropyl)-β-cyclodextrin The most notable anticancer agent, bryostatin, and eribulin are marine macrolides having intriguing tetrahydropyran and furan motif.

Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics