Results 211 to 220 of about 57,395 (255)

PARTIAL SYNTHESIS OF CHLOROPHYLL-A FROM RHODOCHLORIN

Tetrahedron, 1981
Abstract A synthesis of chlorophyll-a from a relay degradation product, rhodochlorin dimethyl ester, is described. Key steps involve formation of methyl pheophorbide-a by thallium(III) promoted photocyclization of the corresponding chlorin-6- β -keto-esler, and magnesium(II) insertion using Eschenmoser's BHT method.
Kevin M. Smith, W. Michael Lewis
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Synthesis of cyclic chlorophyll oligomers

Tetrahedron Letters, 2006
Abstract As a new model of photosynthetic light-harvesting antennas, cyclic dimer, trimer, and tetramer of chlorophyllous moieties were prepared by intermolecular transesterification of a hydroxy-methoxycarbonyl-chlorin using 1,3-dichlorotetrabutyl distannoxane as a catalyst. 1 H NMR and UV–vis spectra showed that the cyclic oligomers tended to form
Shin-ichi Sasaki, Hitoshi Tamiaki
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Chlorophyll Synthesis in the Dark in Peas

1984
Our earlier work (Adamson 1978, Adamson, Hiller, Vesk 1980; Adamson, Hiller 1981, Adamson, 1982a,b) established that the flowering plants, Tradescantia albiflora, Tradescantia blossfeldiana, Pollia crispata, Zostera capricorni, Posidonia australis and Hordeum vulgare continue to synthesise chlorophyll when transferred from light to darkness.
H. Adamson, N. Packer, B. Sanders
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Synthesis, Reactivity and Structure of Chlorophylls

2007
Summary Chlorophylls (Chls) and bacteriochlorophylls (BChls) are complex tetrapyrroles that continue to attract the attention of synthetic chemists. While Chl reactivity is similar to that of porphyrins, the reduced pyrrole rings which lower their stability and the complex substituent pattern which is observed in nature, makes their syntheses ...
Mathias O. Senge, Arno Wiehe, Claudia Ryppa   +2 more
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Synthesis of chlorophyll-f analogs possessing the 2-formyl group by modifying chlorophyll-a

Bioorganic & Medicinal Chemistry Letters, 2014
A methyl group at the 2-position of methyl mesopyropheophorbide-a was transformed to the 2-formyl group to give methyl mesopyropheophorbide-f, one of the chlorophyll-f analogs. The 2-formylation moved the redmost electronic absorption band in a solution to a longer wavelength and the bathochromic shift was comparable to that by the 3-formylation.
Meiyun, Xu, Yusuke, Kinoshita, Hitoshi, Tamiaki   +2 more
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Effects of bisphenol A on chlorophyll synthesis in soybean seedlings

Environmental Science and Pollution Research, 2014
Bisphenol A (BPA), as an emerging environmental pollutant, is potentially harmful to plant growth. Chlorophyll (Chl) is critical in photosynthesis that provides matter and energy for plant growth. How BPA affects the chlorophyll content remains largely unknown. Here, the effects of BPA on Chl synthesis in soybean seedlings were investigated.
Liya, Jiao, Lihong, Wang, Zhiyong, Qiu, Qingqing, Wang, Qing, Zhou, Xiaohua, Huang   +5 more
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GUN4, a Regulator of Chlorophyll Synthesis and Intracellular Signaling

Science, 2003
Nuclear genes control plastid differentiation in response to developmental signals, environmental signals, and retrograde signals from plastids themselves. In return, plastids emit signals that are essential for proper expression of many nuclear photosynthetic genes.
Robert M, Larkin, Jose M, Alonso, Joseph R, Ecker, Joanne, Chory   +3 more
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PHOTOCONTROL OF ANTHOCYANIN SYNTHESIS: PHYTOCHROME, CHLOROPHYLL AND ANTHOCYANIN SYNTHESIS*

Photochemistry and Photobiology, 1974
Abstract—Anthocyanin synthesis in cabbage and mustard seedlings depends upon duration and irradiance of the light treatment. The relative effectiveness of radiation in various spectral regions depends upon the length of the irradiation and decreases with increasing dose.
A. L. Mancinelli, Ping‐Kaung Ku Tai, R. Susinno   +2 more
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Intracellular Signaling and Chlorophyll Synthesis

2008
The chloroplast proteome is encoded by genes that reside in both the chloroplast and the nucleus. This separation of genetic material necessitates a system for coordinating the expression of genes that reside in each compartment. Because the overwhelming majority of genes that encode chloroplast proteins reside in the nucleus, the regulation of nuclear
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ChemInform Abstract: The Total Synthesis of Chlorophyll a

ChemInform, 1991
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.
R. B. WOODWARD, W. A. AYER, J. M. BEATON, F. BICKELHAUPT, R. BONNETT, P. BUCHSCHACHER, G. L. CLOSS, H. DUTLER, J. HANNAH, F. P. HAUCK, S. ITO, A. LANGEMANN, E. LE GOFF, W. LEIMGRUBER, W. LWOWSKI, J. SAUER, Z. VALENTA, H. VOLZ   +17 more
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