Results 211 to 220 of about 239,951 (256)

Cobalt/Photoredox Catalyzed Desymmetrization of Oxo and Azabicycles via Asymmetric Reductive Coupling With Alkynes

Advanced Science, EarlyView.
A one‐step, asymmetric reductive coupling of alkynes and oxa‐ and aza‐bicyclic olefins using a cobalt/photoredox catalytic system through desymmetrization. ABSTRACT Bicyclo[2.2.1]heptane frameworks represent a privileged structural motif prevalent in numerous natural products and bioactive molecules.
Subhankar Pradhan, Arko Saha, Bholanath Maity, Sayan Dutta, Luigi Cavallo, Basker Sundararaju   +5 more
wiley   +1 more source

Regioselective synthesis of aza-saccharins <i>via</i> anionic [1,4] Fries-type rearrangement of aryl sulfonimidoyl fluorides. [PDF]

Chem Sci
Leypold M, Poli L, Earl M, Putra OD, Kwapien K, Lewis RJ, Murphy JJ, Passamonti M, von Sydow LM, Spelling V, Asproudis I, Sardana M, Gatti C, Seki H, Lemaitre T, Juskaite R, Gopalakrishnan R, Francis SJ, Gardelli C, Norrby PO, Czechtizky W.   +20 more
europepmc   +1 more source

Streptavidins Coordinate Biotin Sequestration and Self‐Resistance Within a Biotin‐Pathway Antibiotic Network

Advanced Science, EarlyView.
A conserved genomic region between two streptavidin genes in Streptomyces packages biosynthetic gene clusters for diverse biotin‐pathway antibiotics: acidomycin, stravidin, the new non‐proteinogenic amino acid ANDA, and the new BioA inhibitor α‐methyl‐KAPA.
Sumire Kurosawa, Jingjun Mo, Xiaotong Diao, Feng Xie, Tingting Wang, Haowen Zhao, Dalei Wu, Rolf Müller, Chengzhang Fu   +8 more
wiley   +1 more source

Sustainable multifaceted HPLC approach for concurrent quantitation of an octa-mixture used in upper respiratory therapy with a five-dimensional sustainability assessment. [PDF]

Sci Rep
Khalil HA, Hafez MG, Elgammal FAH, Belal TS, Gawad DA.   +4 more
europepmc   +1 more source

SERS Facemask for Rapid and Portable Sensing Mycobacterium Tuberculosis Antigens for TB Screening

Advanced Science, EarlyView.
Our study introduced an Au─Ag embedded covalent organic framework (U@COF) ‐mediated facemask for sensing TB antigen ESAT‐6/CFP‐10 complex in clinical droplet samples toward TB screening. Practical analysis of clinical samples demonstrated the availability of our facemask, which is capable of identifying the TB subjects (N = 17) from healthy candidates (
Lingzhi Chen, Jiaqi Yu, Jing Xu, Lingqi Chen, Ninghao Zhang, Wenrui Li, Runmin Zeng, Xiaomin Luo, Yiqun Chang, Jiayin Lai, Wenshi Huang, Xiaochen Liang, Ting Zhao, Shanze Chen, Huaihong Cai, Yanguang Cong, Pinghua Sun, Jiang Pi, Xueqin Huang, Haibo Zhou, Junxia Zheng   +20 more
wiley   +1 more source

Eco-friendly second-derivative synchronous fluorescence method for the determination of empagliflozin and sitagliptin in tablets and plasma samples. [PDF]

Sci Rep
Mohamad AAA, Almrasy AA, Abdelazim AH, Taha AS.   +3 more
europepmc   +1 more source

A sustainable spectrofluorimetric method for ivabradine quantification based on erythrosin B quenching with quantum mechanical modeling and Box-Behnken design optimization. [PDF]

RSC Adv
Alqahtani AS, Abduljabbar MH, Alnemari RM, Althobaiti MM, Aldawsari MF, Al-Mutairi AA, Serag A, Almalki AH.   +7 more
europepmc   +1 more source

Fabrication of Fe-Mn mixed oxide nanosheets via microwave assistance as an advanced probe for ultra-sensitive nepafenac sensing in diverse matrices; paving the way for future applications. [PDF]

BMC Chem
El-Emam KR, El-Masry AA, Elmansi H, El-Gohary NS.   +3 more
europepmc   +1 more source

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Michael Richard, T E Mcalindon, J B Driban   +2 more
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