Results 31 to 40 of about 1,712,028 (279)

SPIRO-COMPOUNDS. PART IV FORMATION OF SPIRO- COMPOUNDS FROM CYCLOPENTANONE. SYNTHESIS OF CYCLOPENTANE-SPIRO-CYCLOPENTANE AND ITS DERIVATIVES.

, 1937
SPIRO-COMPOUNDS. PART IV FORMATION OF SPIRO- COMPOUNDS FROM CYCLOPENTANONE.
NRIPENDRA NATH CHATTERJEE
core   +1 more source

Investigation of the imidazole-derived moiety/spiro[fluorene-9,9′-xanthene] hybrid compounds for blue luminescent materials

, 2021
Three new imidazole-derived moiety/spiro[fluorene-9,9′-xanthene] hybrid compounds, 1-phenyl-2-(4-(spiro[fluorene-9,9′-xanthen]-2-yl)phenyl)-1H-benzo[d]imidazole (SFX-PBI), 1-(4-(tert-butyl)phenyl)-2-(4-(spiro[fluorene-9,9′-xanthen]-2-yl)phenyl)-1H ...
Li, Yuanying, Yu, Tianzhi, Su, Wenming, Li, Yanmei, Zhao, Yuling, Ma, Hailin, Wang, Ruidong, Qian, Long   +7 more
core   +1 more source

Synthesis of spiro quasi[1]catenanes and quasi[1]rotaxanes via a templated backfolding strategy

Nature Communications, 2017
Spiro compounds contain two or more rings linked together through one common atom. Here the authors provide a method to backfold both rings, producing spiro quasi[1]catenanes, via a strategy of temporarily linking the linear intermediates with covalent ...
Luuk Steemers, Martin J. Wanner, Martin Lutz, Henk Hiemstra, Jan H. van Maarseveen   +4 more
doaj   +1 more source

(±)-Peniorthoesters A and B, Two Pairs of Novel Spiro-Orthoester en-antiomers With an Unusual 1,4,6-Trioxaspi-ro[4.5]decane-7-One Unit From Penicillium minioluteum

Frontiers in Chemistry, 2018
(±)-Peniorthoesters A and B (±1 and ±2), two pairs of unprecedented spiro-orthoester enantiomers with a 1,4,6-trioxaspiro[4. 5]decane-7-one unit, were obtained from Penicillium minioluteum. Their structures were determined by spectroscopic methods, X-ray
Xiaorui Liu, Chunmei Chen, Yinyu Zheng, Mi Zhang, Qingyi Tong, Junjun Liu, Qun Zhou, Jianping Wang, Zengwei Luo, Hucheng Zhu, Yonghui Zhang   +10 more
doaj   +1 more source

Microbial Transformation of neo-Clerodane Diterpenoid, Scutebarbatine F, by Streptomyces sp. CPCC 205437

Frontiers in Microbiology, 2021
Biotransformation of the neo-clerodane diterpene, scutebarbatine F (1), by Streptomyces sp. CPCC 205437 was investigated for the first time, which led to the isolation of nine new metabolites, scutebarbatine F1–F9 (2–10). Their structures were determined
Dewu Zhang, Xiaoyu Tao, Guowei Gu, Yujia Wang, Wenxia Zhao, Wuli Zhao, Yan Ren, Shengjun Dai, Liyan Yu   +8 more
doaj   +1 more source

Spiro Cyclohexadienones from the Reaction of Phenolic Enaminone Derivatives with Hypervalent Iodine Reagents

Molecules, 2000
Phenolic enamino compounds, prepared from 2-(4-hydroxyphenyl)-ethylamine and the corresponding β-keto carbonyl compounds, afford spiro cyclohexadienone derivatives on reaction with hypervalent iodine reagents.
Anastasios Varvoglis, Spyros Spyroudis, Ioannis Papoutsis, Anna Asmanidou   +3 more
doaj   +1 more source

Facile, Regio- and Diastereoselective Synthesis of Spiro-Pyrrolidine and Pyrrolizine Derivatives and Evaluation of Their Antiproliferative Activities

Molecules, 2014
A number of novel spiro-pyrrolidines/pyrrolizines derivatives were synthesized through [3+2]-cycloaddition of azomethine ylides with 3,5-bis[(E)-arylmethylidene]tetrahydro-4(1H)-pyridinones 2a–n.
Abdulrahman I. Almansour, Raju Suresh Kumar, Farzana Beevi, Amir Nasrolahi Shirazi, Hasnah Osman, Rusli Ismail, Tan Soo Choon, Brian Sullivan, Kellen McCaffrey, Alaa Nahhas, Keykavous Parang, Mohamed Ashraf Ali   +11 more
doaj   +1 more source

Sub‐1 ms Optoelectronic Synapse Based on {ZnCdO/ZnO} Multilayer Structure for High‐Speed Neuromorphic Vision Systems

Advanced Functional Materials, EarlyView.
Eu‐doped {ZnCdO/ZnO} structures grown on Si are developed, showcasing dual‐functionality controlled by europium doping. While high europium concentration transforms the device into an ultrafast, self‐powered photodetector, low‐doped structures can be used as an optoelectronic synapse.
Igor Perlikowski, Eunika Zielony, Adrian Kaim, Ewa Przeździecka   +3 more
wiley   +1 more source

Peniciadametizine A, a Dithiodiketopiperazine with a Unique Spiro[furan-2,7'-pyrazino[1,2-b][1,2]oxazine] Skeleton, and a Related Analogue, Peniciadametizine B, from the Marine Sponge-Derived Fungus Penicillium adametzioides

Marine Drugs, 2015
Peniciadametizine A (1); a new dithiodiketopiperazine derivative possessing a unique spiro[furan-2,7'-pyrazino[1,2-b][1,2]oxazine] skeleton, together with a highly oxygenated new analogue, peniciadametizine B (2); as well as two known compounds ...
Yang Liu, Attila Mándi, Xiao-Ming Li, Ling-Hong Meng, Tibor Kurtán, Bin-Gui Wang   +5 more
doaj   +1 more source

Reaction‐Time pH Stabilization by Poly(acrylic acid) with Ethanol‐Mediated Growth Control for Efficient Hydrothermal Sb2(S,Se)3 Solar Cells

Advanced Functional Materials, EarlyView.
Poly(acrylic acid) acts as a reaction‐time pH buffer during hydrothermal Sb2(S,Se)3 growth through its COOH/COO‐ equilibrium. When combined with ethanol‐regulated growth, this buffering strategy reduces Sb‐O related surface disorder, improves local electronic uniformity and carrier collection, and increases the champion solar‐cell efficiency to 10.25%,
Juhee Lee, Geumha Lim, Wookyung Jeon, Seongju Park, Jinwoo Chu, Yohan Yoon, William Jo, Byungha Shin   +7 more
wiley   +1 more source