Total syntheses of geissoschizine-type monoterpenoid indole alkaloids (MTIAs) are reported. An intramolecular Pictet-Spengler cyclization was developed for the selective construction of the 3R stereocenter. The first total synthesis of (+)-villocarine A was then achieved. Furthermore, the first total synthesis of the highly strained (-)-apogeissoschizine was also accomplished in an aza-Michael cyclization/E1cB elimination/stereoselective olefin isomerization sequence. Finally, (+)-geissoschizine, a common biosynthetic intermediate of MTIAs, was obtained from apogeissoschizine through ring-opening along with a release of ring strain.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1002/chem.202300179 | DOI Listing |
J Wound Care
January 2025
Alice Lee Centre for Nursing Studies, Yong Loo Lin School of Medicine, National University of Singapore, Clinical Research Centre, Singapore.
Objective: There is little use of maggot debridement therapy (MDT) worldwide, albeit there is much literature supporting its benefits and effectiveness for hard-to-heal (chronic) wounds. Hard-to-heal wounds are becoming ever more prevalent and MDT can play a pivotal role in wound care management. This underuse can be associated with patients' perceptions and experiences of MDT.
View Article and Find Full Text PDFJ Clin Med
January 2025
Department of Internal Medicine, 4th Military Clinical Hospital, 50-981 Wroclaw, Poland.
Fungal periprosthetic joint infections (PJIs) are rare but increasingly recognized complications following total joint arthroplasty (TJA). While remains the most common pathogen, non-albicans species and other fungi, such as , have gained prominence. These infections often present with subtle clinical features and affect patients with significant comorbidities or immunosuppression.
View Article and Find Full Text PDFNutrients
December 2024
Centre for Diabetes, Obesity and Endocrinology Research (CDOER), Westmead Institute for Medical Research, Westmead, Sydney, NSW 2145, Australia.
Background: Recent findings have highlighted that abnormal energy metabolism is a key feature of autosomal-dominant polycystic kidney disease (ADPKD). Emerging evidence suggests that nutritional ketosis could offer therapeutic benefits, including potentially slowing or even reversing disease progression. This systematic review aims to synthesise the literature on ketogenic interventions to evaluate the impact in ADPKD.
View Article and Find Full Text PDFFoods
December 2024
Department of Food Science, Université Laval, Québec, QC G1V 0A6, Canada.
Porcine blood, a significant byproduct of the pork industry, represents a potential source of antimicrobial peptides (AMPs). AMPs offer a promising alternative to chemical antimicrobials, which can be used as natural preservatives in the food industry. AMPs can exhibit both antibacterial and/or antifungal properties, thus improving food safety and addressing the growing concern of antibiotic and antifungal resistance.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!