Results 71 to 80 of about 1,879 (233)

Crystal structure of 2'H,7'H-dispiro[fluorene-9,2'-dibenzo[c,e]- oxepine-7',9"-fluorene], C38H24O

Zeitschrift für Kristallographie - New Crystal Structures, 2003
C38H24O, monoclinic, P121/n1 (No. 14), a = 10.737(2) Å, b = 16.963(3) Å, c = 15.246(3) Å, β = 109.30(3)°, V = 2620.8 Å3, Z = 4, Rgt(F) = 0.088, wRref(F2) = 0.252, T = 293 K.
Ibragimov B. T., Weber E., Beketov K. M., Makhkamov K. K.   +3 more
doaj   +2 more sources

Synthesis of 5α-Androstane-17-spiro-δ-lactones with a 3-Keto, 3-Hydroxy, 3-Spirocarbamate or 3-Spiromorpholinone as Inhibitors of 17β-Hydroxysteroid Dehydrogenases

Molecules, 2013
We synthesized two series of androstane derivatives as inhibitors of type 3 and type 5 17β-hydroxysteroid dehydrogenases (17β-HSDs). In the first series, four monospiro derivatives at position C17 were prepared from androsterone (ADT ...
Donald Poirier, Jenny Roy, Béatrice Tchédam Ngatcha, Guy Bertrand Djigoué   +3 more
doaj   +1 more source

Hydrindacene‐Based Zinc Aryl Thiolate and Aryl Selenolate Zn(EMSFluind)2 (E=S, Se)

Zeitschrift für anorganische und allgemeine Chemie, Volume 650, Issue 9-10, May 17, 2024.
The bulky s‐hydrindacene‐based MSFluind substituent was used to generate thiol 1S and selenol 1Se and the corresponding zinc aryl thiolate 2S and selenolate 2Se, all of which were structurally characterized using single crystal XRD. Abstract The bulky aryl thiol, MSFluindSH (1S), and aryl selenol, MSFluindSeH (1Se), possessing a tetramethyl‐s ...
Pascal Komorr, Pim Puylaert, Jens Beckmann   +2 more
wiley   +1 more source

Design and Synthesis of Donor−σ–π–σ–Acceptor-Type Dispiro Molecules

, 2019
Two novel donor−σ–π–σ–acceptor-type dispiro molecules10-phenyl-10H-dispiro-acridine-9,9′-anthracene-10′,9′′-fluorene-2′′,7′′-dicarbo-nitrile (DiSAAF) and dispiro-fluorene-9,9′-anthracene-10′,9′′-quinolino­[3,2,1-kl]­phenoxazine-2,7-dicarbonitrile ...
Man-Keung Fung (1886806), Liang-Sheng Liao (1586392), Man-Keung Fung, Shuang-Qiao Sun, Liang-Sheng Liao, Wei Luo, Hong-Cheng Li (5676599), Zuo-Quan Jiang, Aziz Khan, Tong-Tong Wang (2638063), Wei Luo (80175), Aziz Khan (4058191), Shuang-Qiao Sun (6865643), Zuo-Quan Jiang (1594987), Hong-Cheng Li, Xiang-Dong Zhu, Xiang-Dong Zhu (6865646), Tong-Tong Wang   +17 more
core   +1 more source

Synthesis of functionalized tetrahydro-dispiro[pyrazolone 4, 2′-pyran-5′, 4″-pyrazolone] scaffolds via an Oxa-Michael-initiated cascade [4 + 2] annulation reaction using pyrazoledione-derived MBH-alcohols

Results in Chemistry
In this study, an efficient protocol was developed for synthesizing tetrahydro-dispiro[pyrazolone 4, 2′-pyran-5′, 4″-pyrazolone] scaffolds, using pyrazoledione-derived MBH alcohols and arylidene pyrazolones.
Xiaoming Zhou, Juan Du, JiPeng Yuan, Xuehan Wang, Hongli Yang, Xuekun Wang, Zhenzhen Gao   +6 more
doaj   +1 more source

Phosphorus–nitrogen compounds: part 75—design, synthesis, stereogenic and conformational properties of chiral dispiro(N/N)cyclotriphosphazenes: structural analysis and photophysical and bioactivity studies

Research on chemical intermediates (Print)
Multiheterocyclic inorganic–organic hybrid phosphazenes have robust inorganic ring systems with the stabilities of the phosphorus nitrogen skeleton and many different substituents bonded to the P atoms.
Reşit Cemaloğlu, Nuran Asmafiliz, Z. Kılıç, Burcu Topaloğlu Aksoy, B. Sabah, Leyla Açık, T. Hökelek   +6 more
semanticscholar   +1 more source

Crystal structures of two 2,9-dithia-13-azadispiro[4.1.47.35]tetradecan-6-ones

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title compounds 4,11-dihydroxy-13-methyl-1,8-di-p-tolyl-2,9-dithia-13- azadispiro[4.1.47.35]tetradecan-6-one, C26H31NO3S2, (I), and 13-benzyl-4,11-dihydroxy-1,8-bis(4-methylphenyl)-2,9-dithia-13-azadispiro[4.1.47.35]tetradecan-6-one, C32H35NO3S2, (
Vijayan Viswanathan, Shanmugavel Bharkavi, Subbu Perumal, Devadasan Velmurugan   +3 more
doaj   +1 more source

Dispiro[cyclopropane-1,5′-endo-tricyclo[5.2.1.02,6]deca-3,8-diene-10′,1′′-cyclopropane]

Acta Crystallographica Section E, 2010
The title compound, C14H16, is built up from three five-membered rings. Two of the five-membered rings display an envelope conformation and the third one is almost planar (r.m.s. deviation = 0.014 Å).
Rafał Grubba, Łukasz Ponikiewski, Jerzy Pikies   +2 more
doaj   +1 more source

Synthesis And Activity Studies Of Novel Dispiro Pyrrolidine Compounds As Potential Antimycobacterial Agents [PDF]

, 2015
Sekumpulan dispiro pirolidina yang mengandungi lima puluh dua sebatian telah berjaya disintesis dengan menggunakan penambahan siklo 1,3 dwikutub. Tindak balas ini terbukti sangat regioselektif, menghasilkan satu set regioisomer sahaja sebagai produk.
Ang , Chee Wei
core  

Crystal structure of ethyl (2S,2′R)-1′-benzyl-3-oxo-3H-dispiro[1-benzothiophene-2,3′-pyrrolidine-2′,11′′-indeno[1,2-b]quinoxaline]-4′-carboxylate

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, C35H27N3O3S, the spiro-linked five-membered rings both adopt twisted conformations. The pyrrolidine ring makes dihedral angles of 80.5 (1) and 77.4 (9)° with the benzothiophene ring system and the quinoxaline ring system ...
J. Govindaraj, R. Raja, M. Suresh, R. Raghunathan, A. SubbiahPandi   +4 more
doaj   +1 more source