Dimeric derivatives of chlorophyll a with fragments of oligoethylene glycols as spacers between macrocycles: Synthesis, dark and photoinduced cytotoxic activitie

2021 ◽  
Author(s):  
Olga M. Startseva ◽  
Yana I. Pylina ◽  
Dmitry M. Shadrin ◽  
Elena S. Belykh ◽  
Oksana G. Shevchenko ◽  
...  
Keyword(s):  
Chlorophyll A ◽  
Derivatives Of ◽  
Oligoethylene Glycols

Pyrazolinyl and cyclopropyl derivatives of protoporphyrin IX and chlorins related to chlorophyll a

Tetrahedron ◽  
2003 ◽  
Vol 59 (4) ◽  
pp. 499-504 ◽  
Author(s):  
Andrei N Kozyrev ◽  
James L Alderfer ◽  
Byron C Robinson
Keyword(s):  
Chlorophyll A ◽  
Protoporphyrin Ix ◽  
Derivatives Of

Identification of Novel Sulfur-Containing Derivatives of Chlorophyll a in a Recent Sediment.

ChemInform ◽  
2003 ◽  
Vol 34 (26) ◽  
Author(s):  
Angela H. Squier ◽  
Dominic A. Hodgson ◽  
Brendan J. Keely
Keyword(s):  
Chlorophyll A ◽  
Recent Sediment ◽  
Derivatives Of ◽  
Sulfur Containing

scholarly journals Synthesis, Characterization and Herbicidal Activity of Amide Derivatives of Glyphosate

2018 ◽  
Vol 34 (5) ◽  
pp. 2378-2383 ◽  
Author(s):  
Jatinder Pal Kaur Gill ◽  
Nidhi Sethi ◽  
Anand Mohan
Keyword(s):  
Chlorophyll Content ◽  
Chlorophyll A ◽  
Structure Analysis ◽  
Herbicidal Activity ◽  
Chlorophyll B ◽  
Total Chlorophyll ◽  
Total Chlorophyll Content ◽  
Amide Derivatives ◽  
The Common ◽  
Derivatives Of

The present work includes synthesis of a series of amide derivatives of glyphosate and their characterization. The structure analysis of these new derivatives was done with the help of FTIR and 1H NMR, Further, their herbicidal activity was analyzed on one of the common weeds (Parthenium hysterophorus). Under the influence of amide derivatives of glyphosate it was found that the chlorophyll content (Chlorophyll a, Chlorophyll b and total Chlorophyll content) of the weed was found to lessen than the control. Moreover, these synthesized derivatives are less polar as compared to the parent glyphosate molecule thereby can emphatically reduce the problem of their leaching into the groundwater.

Synthesis of donor–acceptor systems based on the derivatives of chlorophyll a and [60]fullerene

2015 ◽  
Vol 25 (1) ◽  
pp. 32-33 ◽  
Author(s):  
Viktoriya S. Lebedeva ◽  
Fatima M. Karmova ◽  
Filipp V. Toukach ◽  
Andrey F. Mironov
Keyword(s):  
Chlorophyll A ◽  
Donor Acceptor ◽  
Derivatives Of

scholarly journals Copper Сomplexes of Сhlorin Derivatives of Chlorophyll a as Potential Photosensitizers for Medical Purposes

2019 ◽  
Vol 12 (1) ◽  
pp. 68-74 ◽  
Author(s):  
D.V. Belykh ◽  
A.S. Kozlov ◽  
Y.I. Pylina ◽  
I.S. Khudyaeva ◽  
А.S. Benditkis ◽  
...  
Keyword(s):  
Chlorophyll A ◽  
Derivatives Of

Synthesis of New Derivatives of Protoporphyrin IX and Chlorophyll a

2005 ◽  
Vol 41 (12) ◽  
pp. 1824-1835 ◽  
Author(s):  
V. Yu. Pavlov ◽  
I. O. Konstantinov ◽  
G. V. Ponomarev ◽  
V. P. Timofeev ◽  
B. G. Kimel'
Keyword(s):  
Chlorophyll A ◽  
Protoporphyrin Ix ◽  
Derivatives Of

Synthesis and characterization of chlorophyll a enol derivatives: Chlorophyll a tert-butyldimethylsilyl-enol ether and 131-deoxo-131, 132-didehydro-chlorophyll a

2016 ◽  
Vol 20 (05) ◽  
pp. 590-601
Author(s):  
Paavo H. Hynninen ◽  
Markku Mesilaakso
Keyword(s):  
Chlorophyll A ◽  
Mass Spectra ◽  
Electronic Absorption Spectra ◽  
Enol Ether ◽  
Sterically Hindered ◽  
Work Up ◽  
Derivatives Of ◽  
C Nmr

Using the sterically hindered base, 1,8-diazabicyclo[5.4.0]undec-7-ene, for enolization and tert-butyldimethylsilyl-trifluoromethanesulfonate for silylation, chlorophyll (Chl) [Formula: see text] produced after 15 min at 0 [Formula: see text]C in deaerated pyridine solution under argon, after work-up and chromatographic purification on a sucrose column, tert-butyldimethylsilyl-enol ether of Chl [Formula: see text] in a yield of 77%. The 131-deoxo-131,132-didehydro-chlorophyll [Formula: see text], was obtained in a yield of 23% through a reaction sequence, where Chl [Formula: see text] was first reduced with sodium borohydride to 13[Formula: see text]-hydroxy-Chl [Formula: see text], which via demetalation yielded 13[Formula: see text]-hydroxypheophytin [Formula: see text]. In the presence of the sterically hindered base, 1,8-bis(dimethylamino)naphthalene, trifluoroacetylimidazole dehydrated 13[Formula: see text]-hydroxypheophytin [Formula: see text] to 131-deoxo-131,132-didehydro-pheophytin [Formula: see text], which after metalation yielded 131-deoxo-131,132-didehydro-Chl [Formula: see text]. Using 1,8-bis(dimethylamino)naphthalene and trifluoroacetylimidazole, the straight conversion of 13[Formula: see text]-hydroxy-Chl [Formula: see text] to 131-deoxo-131,132-didehydro-Chl [Formula: see text] was found unsuccessful. The major products were characterized by electronic absorption spectra (UV-vis) and practically completely assigned 1H and [Formula: see text]C NMR spectra. Some intermediates of the syntheses were also characterized by ESI-TOF mass spectra. Compared with Chl [Formula: see text], the macrocyclic ring-current in the synthesized Chl [Formula: see text] enol derivatives was found weakened by the expansion of the [Formula: see text]-system to include the isocyclic ring E. Nevertheless, these enol derivatives were still considered to be diamagnetic and aromatic. The possibility of the functional role of the enol derivatives of chlorophyll in photosynthesis is discussed.

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