Results 81 to 90 of about 1,879 (233)

Crystal structure of 1′,1′′-dimethyl-4′-(4-cholorophenyl)dispiro[11H-indeno[1,2-b]quinoxaline-11,2′-pyrrolidine-3′,3′′-piperidin]-4′′-one

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, C30H27ClN4O, the central pyrrolidine ring adopts an envelope conformation with the methylene C atom being the flap. The quinoxaline and indane rings are each essentially planar, with r.m.s. deviations of 0.027 (1) and 0.0417 (1) Å,
R.A. Nagalakshmi, J. Suresh, K. Malathi, R. Ranjith Kumar, P. L. Nilantha Lakshman   +4 more
doaj   +1 more source

Synthesis of Novel Dispiro 1,4-Benzothiazine Hybrid Heterocycles Through 1,3-Dipolar Cycloaddition

, 2015
The 1,3-dipolar cycloaddition of azomethine ylides generated in situ from the reaction of acenaphthylene-1,2-dione or isatins and α-amino acids to (E)-methyl/ethyl 2-(3-oxo-3,4-dihydro-2H-benzo[b][1,4]thiazin-2-ylidene)acetate led to the stereoselective ...
Karuppiah Malathi (680400), Raju Ranjith Kumar (579023), Veerappan Jeyachandran (680401), Karumpan Kalaiselvan (680402)   +3 more
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syn-Dispiro[1,3-dioxolane-2,17′-pentacyclo[12.2.1.16,9.02,13.05,10]octadecane-18′,2′′-[1,3]dioxolane]-7′,15′-diene

Acta Crystallographica Section E, 2010
The title compound, C22H28O4, is composed of a central octadecane ring and two spiro[bicyclo[2.2.1]hept[2]ene-7,2′-[1,3]dioxolane] units.
Rulla M. Kachlan, Macey C. Ruble, Jacob C. Timmerman, Markus Etzkorn, Daniel S. Jones   +4 more
doaj   +1 more source

Design and synthesis of orally active dispiro 1,2,4,5-tetraoxanes; synthetic antimalarials with superior activity to artemisinin.

, 2006
Unsymmetrical dispiro- and spirotetraoxanes have been designed and synthesized via acid-catalyzed cyclocondensation of bis(hydroperoxides) with ketones.
Stachulski, Andrew V., Amewu, Richard, Stachulski, Andrew V, Bray, Patrick G., O'Neill, Paul M., Berry, Neil G., Berry, Neil G, Davies, Jill, Ward, Steve, O'Neill, Paul M, Bray, Patrick G, Ward, Stephen A, Labat, Gael, Vivas, Livia   +13 more
core   +1 more source

A highly hindered bithiophene-functionalized dispiro-oxepine derivative as an efficient hole transporting material for perovskite solar cells

, 2016
Dimethoxydiphenylamine-substituted dispiro-oxepine derivative 2,2′,7,7′-tetrakis-(N,N′-di-4-methoxyphenylamine)dispiro-[fluorene-9,4′-dithieno[3,2-c:2′,3′-e]oxepine-6′,9′′-fluorene] (DDOF) has been designed and synthesized using a facile synthetic route.
Paek, S, Dahmen, KH, Gao, P, Gratia, P, Nazeeruddin, MK, Lee, Y, Sohail, M, Cho, KT, Rakstys, K   +8 more
core   +2 more sources

1′,1′′-Dimethyl-4′-(4-methylphenyl)dispiro[11H-indeno[1,2-b]quinoxaline-11,2′-pyrrolidine-3′,3′′-piperidin]-4′′-one

Acta Crystallographica Section E, 2013
In the title compound, C31H30N4O, the central pyrrolidine ring adopts an envelope conformation with the methylene C atom being the flap. The quinoxaline and indane rings are each planar, having r.m.s.
R. A. Nagalakshmi, J. Suresh, K. Malathi, R. Ranjith Kumar, P. L. N. Lakshman   +4 more
doaj   +1 more source

Dispiro- 1,2,4,5-tetraoxanes: A New Class of Antimalarial Peroxides

, 1992
Dispiro-l,2,4,5tetraoxanes2 -4 were synthesized as potential peroxide a n t h a l a* d drugs. They had curative activity against Plasmodium berghei in vivo at single doses of 320 and 640 mg/kg which confirms earlier unpublished data Moreover, artemisinin
Wood, James K., Vennerstrom, Jonathan L., Walter Reed Army Institute of Research, Fu, Hong-Ning, Ager, Arba L., Jr.   +4 more
core  

Highly efficient endo’- selective synthesis of (dispiro 3,2′-pyrrolidinyl) bisoxindoles containing three contiguous chiral stereocenters with two contiguous quaternary spirostereocenters

, 2020
: An efficient, atom economical, one-pot synthesis of endo’- selective (dispiro 3,2′-pyrrolidinyl) bisoxindole containing three contiguous chiral stereocenters with two contiguous quaternary spirostereo centers have been achieved by three-component ...
Singh, Huidrom Birkumar, Yuvaraj, Panneerselvam, Kandapalam, Arun Prasath Lingam, Kathirvelan, Devarajan, Nagarajan, Sankaranarayanan   +4 more
core   +1 more source

rac-Methyl (1R,3′S)-1′,1′′-dimethyl-2,2′′-dioxo-2H-dispiro[acenaphthylene-1,2′-pyrrolidine-3′,3′′-indoline]-4′-carboxylate

Acta Crystallographica Section E, 2013
In the title compound, C26H22N2O4, the pyrrolidine ring adopts a twisted conformation and the other five-membered rings adopt envelope conformations with the spiro C atoms as the flap atoms.
G. Ganesh, Panneer Selvam Yuvaraj, Chinthalapuri Divakara, Boreddy S. R. Reddy, A. SubbiahPandi   +4 more
doaj   +1 more source

SYNTHESIS OF DISPIRO AND TRISPIROCYCLOTRIPHOSPHAZENE DERIVATIVES, INVESTIGATION OF THEIR CRYSTAL STRUCTURE AND SPECTROSCOPIC PROPERTIES

, 2023
Tez kapsamında, farklı iki dişli sübstitüentler ile 5’ orijinal 8 bileşik sentezlendi. Monospiroferrosenilfosfazen bileşik 1 (monospiroNN) ve 2’nin (monospiroNO), difonksiyonel sübstitüent olan 2,2'-bifenol ile 1:1 stokiometrik oranda reaksiyonlarından ...
Magne, Elodıe Mıchele
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