We present a straightforward method for the synthesis of Ngai trifluoromethoxy reagent and longer carbon chain variants, thereby expanding the range of options for perfluoroalkoxylation reactions. Utilizing cost-effective sodium perfluoroalkane sulfinates (RSONa) and -hydroxylamines, we achieved efficient oxidative cross-coupling reactions facilitated by cerium(IV) ammonium nitrate (CAN) without the need for transition-metal catalysts. The methodology proved effective not only for the synthesis of Ngai-type radical perfluoroalkoxylation reagents but also Qing-type nucleophilic perfluoroalkoxylation reagents.
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http://dx.doi.org/10.1021/acs.orglett.4c04170 | DOI Listing |
Org Lett
December 2024
Department of Nanopharmaceutical Sciences, and Department of Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan.
J Cachexia Sarcopenia Muscle
February 2025
Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Kowloon, Hong Kong.
Background: Cigarette smoking is known to affect muscle function and exercise capacity, including muscle fatigue resistance. Most studies showed diminished cross-sectional area and fibre type shifting in slow-twitch muscles such as the soleus, while effects on fast-twitch muscles were seldom reported and the differential responses between muscle types in response to exposure to cigarette smoke (CS) were largely unknown. This study aimed to elucidate the histomorphological, biochemical and transcriptomic changes induced by CS on both slow-twitch and fast-twitch muscles.
View Article and Find Full Text PDFJ Exp Med
December 2024
Department of Immunology, University of Toronto, Toronto, Canada.
Immunoglobulin (Ig) A supports mucosal immune homeostasis and host-microbiota interactions. While commensal bacteria are known for their ability to promote IgA, the role of non-bacterial commensal microbes in the induction of IgA remains elusive. Here, we demonstrate that permanent colonization with the protozoan commensal Tritrichomonas musculis (T.
View Article and Find Full Text PDFJ Am Chem Soc
November 2024
Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States.
The alkene-carboxylate transposition (ACT) of allyl carboxylates is one of the most atom-economic and synthetically reliable transformations in organic chemistry, as allyl carboxylates are versatile synthetic intermediates. Classic ACT transformations, including [3,3]-sigmatropic rearrangement and transition metal-catalyzed allylic rearrangement, typically yield 1,2-alkene/1,3-acyloxy shifted products through a two-electron process. However, position-altered ACT to produce distinct 1,3-alkene/1,2-acyloxy shifted products remains elusive.
View Article and Find Full Text PDFViruses
October 2024
UHN-Toronto General Hospital, University of Toronto, Toronto, ON M5G 1L7, Canada.
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