Results 181 to 190 of about 1,879 (233)

A Novel S-Arylated Dispiro Derivative of 2-Thiohydantoin

Russian Journal of Organic Chemistry, 2020
A method has been developed for the preparation of a new type of dispiro derivative, 5''-bromo-2-[(4-chlorophenyl)sulfanyl]-1'-methyl-1,4'-diphenyldispiro[imidazole-4,3'-pyrrolidine-2',3''-indoline]-2'',5(1H)-dione, starting from 2-thiohydantoin and using a 1,3-dipolar cycloaddition reaction.
A. V. Finko, S. P. Stepanova, M. E. Kukushkin, S. V. Kovalev, B. N. Tarasevich, V. A. Chertkov, N. V. Zyk, A. G. Majouga, E. K. Beloglazkina   +8 more
openaire   +1 more source

Synthesis and Biological Activity of Tetracyclic Dispiro Core Derivatives of Natural Products Dispirocochlearoids A-C.

Organic Letters
Natural products dispirocochlearoids A-C, which are meroterpenoids derived from Ganoderma fungi, feature a 6/6/5/6/6/6 ring system and exhibit selective COX-2 inhibitory activity.
Junping Pei, Ying Wang, Shengjie Shi, Linhai Chen, Jianpeng Yin, Fajun Nan   +5 more
semanticscholar   +1 more source

A High Regioselective Synthesis of Novel Dispiro[oxindole‐cyclohexanone]pyrrolidines.

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Ambrose Amal Raj, Raghavachary Raghunathan   +1 more
openaire   +1 more source

Tripeptide linked dispiro cyclotriphosphazene conjugates: Synthesis, molecular docking analysis of compounds binding within cancer cell line receptors and in vitro cytotoxic and genotoxic activities.

Bioorganic chemistry (Print)
The novel dioxybiphenyl bridged-cyclotriphosphazenes (DPP) bearing tripeptide were synthesized and investigated for their molecular docking analysis, visualizing their binding profiles within various cancer cell line receptors and in vitro cytotoxic and ...
E. Çalışkan, Irfan Capan, Suat Tekin, Mohammed T. Qaoud, Fatih Biryan, Kenan Koran, Suleyman Sandal, Ahmet Orhan Görgülü   +7 more
semanticscholar   +1 more source

Catalyst-Controlled Diastereodivergent Synthesis of Dispiro Compounds via Formal (3 + 2) Cyclization.

Journal of Organic Chemistry
Mg/Pd-catalyzed the same formal (3 + 2) cycloaddition of spirovinylcyclopropyl oxindoles and 2-arylidene-1,3-indanediones was realized for the first time.
Li-juan Xiang, Ying-Mei Li, You-Ping Tian, Wen‐Hui Zhang, Xin Wei, Ying Zhou, Chuan-Wen Lei   +6 more
semanticscholar   +1 more source

ChemInform Abstract: A Novel Entry into a New Class of Spiroheterocyclic Framework: Regioselective Synthesis of Dispiro[oxindole‐cyclohexanone]pyrrolidines and Dispiro[oxindolehexahydroindazole]pyrrolidines.

ChemInform, 2002
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
A. Amal Raj, R. Raghunathan
openaire   +1 more source

Synthesis and Rearrangement of Dispiro-Epoxy-β-Lactams

Synthetic Communications, 1992
Abstract α-Methylene-β-lactams are prepared by a Peterson olefination reaction. These substrates can be epoxidized with MCPBA to give the title dispiro-epoxy-β-lactams. Under the influence of boron trifiuoride, these substrates rearrange to spiro-3-ketolactams.
openaire   +1 more source

ChemInform Abstract: Rod‐Like Dispiro(5.1.5.2) Compounds.

ChemInform, 1992
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
J. BOETTCHER, R. HARTMANN, F. VOEGTLE
openaire   +1 more source

Biomimetic synthesis of dispiro sesquiterpene lactone type of alkaloids and discovery of potential anticancer scaffolds

New Journal of Chemistry
Herein, we developed the biomimetic synthesis of densely functionalized dispiro sesquiterpene lactone type of alkaloids via azomethine ylide cycloaddition, subsequent N-oxidation and 1,2-migration followed by a ring expansion.
Dong‐Gui Guo, Lin‐Lu Liu, Sijie Zhang, Hong‐Xing Cen, Xiong-Li Liu, Hui-Juan Wang, Li-Jun Peng   +6 more
semanticscholar   +1 more source

Semi-synthesis of novel dispiro hybrids of sesquiterpene lactones by using benzylamines via azomethine ylide cycloaddition.

Natural Product Research
A pair of isomeric sesquiterpenes, alantolactone and isoalantolactone, were isolated from Inula racemosa Hook. f. and utilised for the synthesis of diverse natural product hybrids using azomethine ylide cycloaddition.
Aliya Tabassum, Suyog R. Bhalerao, Goutam Dubey, A. Katare, Yogesh P. Bharitkar   +4 more
semanticscholar   +1 more source