Results 281 to 290 of about 3,034,026 (343)

Enantioselective Synthesis of Spiro Heterocyclic Compounds Using a Combination of Organocatalysis and Transition‐Metal Catalysis

The chemical record, 2023
Over the last ten years, the combination of organocatalysis with transition metal (TM) catalysis has become one of the most important toolboxes used for synthesizing optically pure compounds containing chiral quaternary centers, including spiro ...
M. Kamlar, Michal Urban, J. Veselý
semanticscholar   +1 more source

Two antibacterial spiro compounds from the roots of Artemisia pallens wall: evidence from molecular docking

Natural Product Research, 2021
Bioassay-guided isolation from acetone extract of the roots of Artemisia pallens Wall yielded two spiro compounds (1 and 2). The structures of these compounds were determined on the basis of spectroscopic techniques such as IR, MS, 1 D and 2 D- NMR.
Varsha S. Honmore, A. Natu, V. Khedkar, M. Arkile, D. Sarkar, S. Rojatkar   +5 more
semanticscholar   +1 more source

A synthon approach to spiro compounds [PDF]

Tetrahedron, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Manabendra Patra, Bijay K. Mishra, Rosy Pradhan, Ajaya Kumar Behera, Rajani K. Behera   +4 more
openaire   +2 more sources

Spiro Compounds for Organic Optoelectronics

ChemInform, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Josef Salbeck, Thomas Fuhrmann-Lieker, Achim Siebert, Till Spehr, Tobat P. I. Saragi   +4 more
openaire   +3 more sources

Compounds with Phosphorus at the Spiro Position [PDF]

ChemInform, 2001
Publisher Summary Four coordinate phosphorus can occupy a spiro position to form compounds analogous to the corresponding quaternary ammonium compounds. There are a number of six coordinate spiro phosphorus compounds. Compounds which have interactions completing the spiro system have been included in this chapter.
openaire   +1 more source

A spiro Meisenheimer compound

Recueil des Travaux Chimiques des Pays-Bas, 1965
AbstractA Meisenheimer compound has been prepared by the action of a base on 1‐(2′‐hydroxyethoxy)‐2,4,6‐trinitrobenzene. The structure contains a 1,3‐dioxolane ring linked to the six membered ring containing the pentadienate system by a common carbon atom.
R. Foster, C. A. Fyfe, J. W. Morris
openaire   +2 more sources

Divergent Synthesis of Methylene Lactone- and Methylene Lactam-Based Spiro Compounds: Utility of Amido-Functionalized γ-Hydroxylactam as a Precursor for Cytotoxic N,O- and N,N-Spiro Compounds.

Journal of Organic Chemistry, 2019
Pharmaceutically attractive methylene lactone- and methylene lactam-based spiro compounds have been synthesized by employing amido-functionalized γ-hydroxylactam as a common intermediate.
T. Sengoku, Anna Shirai, A. Takano, Toshiyasu Inuzuka, M. Sakamoto, Masaki Takahashi, H. Yoda   +6 more
semanticscholar   +1 more source

Spiro Heterocyclic Compounds as Potential Anti-Alzheimer agents (Part 2): their Metal Chelation Capacity, POM Analyses and DFT Studies.

Medicinal chemistry, 2020
BACKGROUND One of the best methods to treat Alzheimer disease (AD) is through the effective use of cholinesterase inhibitors as vital drugs due to the identification of acetylcholine deficit in the AD patients.
T. Hadda, F. Deniz, I. Orhan, H. Zgou, A. Rauf, Y. Mabkhot, B. Bennani, Dalia R. Emam, N. A. Kheder, Abdulrhman Asayari, Abdullatif Bin Muhsinah, Aneela Maalik   +11 more
semanticscholar   +1 more source

Synthesis of Spiro Compounds Based on 1H-Pyrrole-2,3-Diones

Mini-Reviews in Organic Chemistry, 2019
Polycyclic structures fused at a central carbon are of great interest due to their appealing conformational features and their structural implications in biological systems.
Valeriya V. Konovalova and Andrey N. Maslivets
semanticscholar   +1 more source

Cyclocondensation of coumarin-3-thioformates with 3-hydroxyoxindoles and 3-aminooxindoles for the synthesis of spiro-fused pentaheterocyclic compounds

Organic Chemistry Frontiers, 2020
A range of spiro-fused pentaheterocyclic compounds including spiro-butyrolactoneoxindole[3,4-c]coumarins and spiro-butyrolactamoxindole[3,4-c]coumarins were smoothly obtained via tandem Michael addition-lactonization/lactamization process.
Chuan-Wen Lei, Chuan-Bao Zhang, Zhen-Hua Wang, Kexin Xie, Jian‐Qiang Zhao, Ming Zhou, Xiaomei Zhang, Xiao‐Ying Xu, Weicheng Yuan   +8 more
semanticscholar   +1 more source