Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.arcped.2016.11.016 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Z-Selective Alkyne Semireduction by an Organic Photoreductant.
Angew Chem Int Ed Engl
March 2025
Ruhr-Universität Bochum: Ruhr-Universitat Bochum, Chemie und Biochemie, GERMANY.
The semireduction of alkynes is an indispensable transformation for the synthesis of Z-alkenes. Although extensive studies with mostly transition metal-based catalysts have enabled it to produce a broad scope of alkenes, a Scifinder search and a robustness screen of Lindlar's catalyst indicate that highly Lewis-basic nitrogen and sulfur-containing motifs, which are prevalent in drugs, remain problematic. Herein, we report an alkyne semi-reduction using an organic photoreductant that tolerates all 10 of the most common Lewis-basic motifs in drugs.
View Article and Find Full Text PDFAndrograpalides A-N, structurally diverse ent-labdane diterpenoids with anti-inflammatory activities from the leaves of Andrographis paniculata.
Phytochemistry
March 2025
State Key Laboratory of Traditional Chinese Medicine Syndrome, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People's Republic of China; Chinese Medicine Guangdong Laboratory, Guangdong Hengqin, 519000, People's Republic of China. Electronic address:
Andrograpalides A-N (1-14), fourteen previously undescribed ent-labdane-type diterpenoids, together with a previously undescribed naturally occurring diterpenoid (15) and two known analogues (16-17), were isolated from the leaves of Andrographis paniculata. Their structures were unambiguously elucidated via extensive spectroscopic analysis, electronic circular dichroism analysis, and X-ray crystallographic studies. Structurally, compounds 1-8 and 16 are rare cases of 19-nor labdane-type diterpenoids with an unusual C carbon skeleton.
View Article and Find Full Text PDFSelective Sorting of Semiconducting C@Single-Walled Carbon Nanotube Heterostructures with Narrow Diameter Distribution.
Adv Sci (Weinh)
March 2025
Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China.
Consistently arranging molecules within single-walled carbon nanotube (SWCNT) templates shows promise for creating advanced 1D heterostructures, but diameter variations in raw SWCNTs pose a significant challenge. In this work, a precise synthesis of C fullerene-filled SWCNTs (C@SWCNTs) is achieved through vapor-phase filling followed by polymer sorting. As the SWCNT diameter increases, C molecules first stack in a single chain, then form unusual configurations, including staggered double chains and double helices-configurations not observed in bulk C crystals.
View Article and Find Full Text PDFLow-Grade Cystic Mucinous Neoplasm of the Colon: A New Entity? Case Report and Review of Literature.
J Gastrointest Cancer
March 2025
Houston Colon PLLC, Houston, TX, USA.
Low-grade cystic mucinous neoplasm of the sigmoid colon has never been previously reported and a classification for such a tumor does not currently exist. Here, we present a case of low-grade cystic mucinous neoplasm of the sigmoid colon and discuss the differential diagnosis especially as it relates to clinical management. Our case is a 68-year-old male who presented with anemia and a history of a lower gastrointestinal tract bleed.
View Article and Find Full Text PDFPolymethylene-Interrupted, Omega-3 and Branched-Chain Fatty Acids and Stable C Values of Wild Gulf of Mexico Oysters () from the Texas Coast.
J Agric Food Chem
March 2025
School of Agriculture and Biotechnology, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China.
The complex fatty acid (FA) composition of the edible portion of American oysters () presents a significant analytical challenge to complete characterization. Here, we employed solvent-mediated covalent adduct chemical ionization to enable comprehensive characterization of its FA composition, with isotope ratio mass spectrometry for initial measurements of FA C signatures. Unusual polymethylene-interrupted (PMI) polyunsaturates were unequivocally identified, with 22:2(7,15) dominating at 5.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!