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1Author    K. EiseleRequires cookie*
 Title    Syntheses of Phenylserin Analogues and Their t-BOC-Derivatives  
 Abstract    The syntheses of phenylserinanalogues and their t-BOC-derivatives are described. 3,4-Methylendioxy-phenylserine is a new amino acid. 
  Reference    (Z. Naturforsch. 30c, 538 [1975]; received February 11 1975) 
  Published    1975 
  Keywords    Phenylserinanalogues, t-BOC-Derivatives, Syntheses 
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 TEI-XML for    default:Reihe_C/30/ZNC-1975-30c-0538_n.pdf 
 Identifier    ZNC-1975-30c-0538_n 
 Volume    30 
2Author    Ernst Bayer, Heribert Hellstern, Heiner EcksteinRequires cookie*
 Title    Synthese von immobilisierten Peptidfragmenten an Polystyrol-Polyoxyethylen zur Affinitätschromatographie Synthesis of Immobilized Peptide Fragments on Polystyrene-Polyoxyethylene for Affinity Chromatography  
 Abstract    Polystyrene-polyoxyethylene craft copolymers have been used for step-wise peptide synthesis. After completion of synthesis the protecting groups are cleaved under acidic conditions, where the polymer-peptide bond is stable. These gels in comparison to polystyrene peptide gels, show better properties for applications in affinity chromatography as well as synthesis on solid supports, because the advantageous properties of polystyrene beads are combined with the excellent spacer behavior of polyoxyethylene chains (mobility, solvation by water and organic solvents). Peptide gels with polylysine sequences have been synthesized as highly selective stationary phases for the separation of the homologous oligo desoxyribonucleotides (d7)n with n = 1—3. The principal possibilities of these gels for affinity chromatography 
  Reference    Z. Naturforsch. 42c, 455—460 (1987); received December 1 1986 
  Published    1987 
  Keywords    birthday Affinity Chromatography, Immobilization, Liquid-Solid-Phase, Peptides, Synthesis 
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 TEI-XML for    default:Reihe_C/42/ZNC-1987-42c-0455.pdf 
 Identifier    ZNC-1987-42c-0455 
 Volume    42 
3Author    T. Hashimoto, M. Tori, Y. Asakawa, E. WollenweberRequires cookie*
 Title    Synthesis of Two Allergenic Constituents of Propolis and Poplar Bud Excretion  
 Abstract    The prenyl ester and the phenylethyl ester of caffeic acid, formed in the bud excretion of poplar species, were shown recently to be the major contact allergens in bee-glue. An unambiguous synthesis of these compounds, based on the reaction of caffeic acid with l-bromo-3-methyl-2-butene and with ß-bromoethylbenzene, respectively, is reported. The synthetic products confirm the previously described structures of the natural products and allow further testing of their allergenic properties. 
  Reference    Z. Naturforsch. 43c, 470—472 (1988); received January 25 1988 
  Published    1988 
  Keywords    Propolis, Contact Allergens, Prenyl Caffeate, Phenylethyl Caffeate, Synthesis 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0470_n.pdf 
 Identifier    ZNC-1988-43c-0470_n 
 Volume    43 
4Author    Yasunobu Sakoda3, KenjiM. Atsui3, YoshihikoA. Kakabe3, Jun Suzukib, AkikazuH. Atanakac, Tadahiko Kajiwara3Requires cookie*
 Title    Chemical Structure-Odor Correlation in Series of Synthetic Methylene Interrupted n-Nonadien-l-ols  
 Abstract    Chemical structure-odor correlations in the isomers of «-Cq-methylene interrupted dienols were explored using synthetic nine isomers of these alcohols. The synthetic dienols were purified by recrystallization or column chromatography of their 3,5-dinitrobenzoate de­ rivatives. Chemical structure-odor correlations in all the isomers of the purified «-nonadien-l-ols were analyzed by treating the data obtained statistically with the principal com ponent analy­ sis method (Sakoda et al., 1995; Cramer et al., 1988) in comparison with those of « -n on en -l-ols. The odor profiles of the /7-nonadien-l-ols were attributable largely to the geom etries of the isomers, compared with «-n on en -l-ols (Sakoda et al., 1995). With the principal com ponent analysis, the odor profiles of the series of the dienols were successfully integrated into the first and the second principal components. The first component (PC 1) consisted of combined char­ acteristics of fruity, fresh, sw eet, herbal and oily-fatty, and the second com ponent (PC 2) leaf or grassy and vegetable-like. O f the methylene interrupted dienol isomers, (2E ,6Z)-and (3Z,6Z)-nonadien-l-ols which are natural products and have (6Z) in the same, deviated markedly from the other isomers as seen in (6Z)-n on en -l-ol of n-nonen-l-ols. That suggests that the double bond of (oo3Z) was an important factor for natural characteristic odor. 
  Reference    Z. Naturforsch. 51c, 841 (1996) 
  Published    1996 
  Keywords    Structure-Odor R elation, Synthesis, Nonadienols, Principal Component Analysis 
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 TEI-XML for    default:Reihe_C/51/ZNC-1996-51c-0841.pdf 
 Identifier    ZNC-1996-51c-0841 
 Volume    51 
5Author    Peter Westhoff, Kurt Zimmermann, Frank Boege, Klaus ZetscheRequires cookie*
 Title    Regulation of the Synthesis of Ribulose-l,5-bisphosphate Carboxylase and Its Subunits in the Flagellate Chlorogonium elongatum. II. Coordinated Synthesis of the Large and Small Subunits  
 Abstract    Transfer of heterotrophically grown cells of the unicellular green alga Chlorogonium elongatum to autotrophic growth conditions causes a 10 -1 5 fold increase in the amount o f the chloroplastic enzyme ribulose-1,5-bisphosphate carboxylase. This increase was found to be due to de novo synthesis. The relative proportions o f large and small subunits o f the enzyme do not change. Their ratio is close to 3.4, the proportions in weight o f the two subunits in the holoenzyme. Continous labelling with [35S]sulfate reveals that the ratios of incorporation into large and small subunits are essentially the same in autotrophic and heterotrophic cells. Pulse-chase experiments show that the subunits are degraded synchronously. The coordinated subunit synthesis cannot be uncoupled using inhibitors o f protein and RNA synthesis or high temperature of cultivation of the alga. The results suggests a very tightly coordinated synthesis o f the large and small subunits of ribulosebisphosphate carboxylase. 
  Reference    Z. Naturforsch. 36c, 942 (1981); received July 18 1981 
  Published    1981 
  Keywords    Ribulose-1, 5-bisphosphate Carboxylase, Synthesis, Subunits, Regulation, Phytoflagellate Chlorogonium elongatum 
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 TEI-XML for    default:Reihe_C/36/ZNC-1981-36c-0942.pdf 
 Identifier    ZNC-1981-36c-0942 
 Volume    36 
6Author    Z. NaturforschRequires cookie*
 Title    Untersuchungen zur Synthese und biologischen Bedeutung von Glutaminsäure-l-semialdehyd als Vorstufe der Chlorophylle  
 Abstract    I n v e stig a tio n s o n th e S y n th e s is a n d B io lo g ic a l S ig n if ic a n c e o f G lu ta m ic -1-s e m ia ld e h y d e as a P r e c u r s o r o f t h e C h lo r o p h y lls H ans-U lrich Meisch und R aim und M aus Glutam ic-1-semialdehyde which is discussed to be involved in the early steps of chlorophyll biosynthesis, has been synthesized from glutam ic acid by reduction of several N-protected carboxylic acid derivatives like the N-CBO-glutamic acid -1-dim ethyl am ide or m ethylanilide, the pyroglutamic acid im idazolide and the acid chlorides of N -phthaloyl-glutam ic acid-5-methyl ester or 5-benzylester. The a-am inoaldehyde could only be generated in solution, where it is polymerized rapidly. Due to its instability, it is suggested th at glutam ic sem ialdehyde plays no role as a free metabolite in green plants. 
  Reference    Z. Naturforsch. 38c, 563—570 (1983); received M arch 4 1983 
  Published    1983 
  Keywords    Glutamic Semialdehyde, Synthesis, Reactivity, G lutam ic Acid, D erivatives 
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 TEI-XML for    default:Reihe_C/38/ZNC-1983-38c-0563.pdf 
 Identifier    ZNC-1983-38c-0563 
 Volume    38 
7Author    Denis Barron, RagaiK. IbrahimRequires cookie*
 Title    Synthesis of Flavonoid Sulfates. II. The Use of Aryl Sulfatase in the Synthesis of Flavonol-3-sulfates  
 Abstract    The rates of aryl sulfatase hydrolysis of several 7-, 4'-and 3-sulfated flavonoids were compared and found to follow the order 7 or 4' >» 3. The complete resistance of the 3-sulfate ester to enzyme hydrolysis provided a unique and convenient method for the synthesis of a number of naturally occurring flavonol-3-sulfates from the corresponding higher sulfated analogs in quanti-tative yield. 
  Reference    Z. Naturforsch. 43c, 625—630 (1988); received February 23/May 17 1988 
  Published    1988 
  Keywords    Flavonol Sulfate Esters, Synthesis, 13 C NMR, FAB-MS, UV Spectra 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0625.pdf 
 Identifier    ZNC-1988-43c-0625 
 Volume    43 
8Author    Denis Barron, RagaiK. IbrahimRequires cookie*
 Title    Synthesis of Flavonoid Sulfates. III. Synthesis of 3',4'-ortho Disulfates Using Sulfur Trioxide-trimethylamine Complex, and of 3'-SuIfates Using Aryl Sulfatase  
 Abstract    A number of flavonoid 3',4'-disulfates were synthesized from the corresponding 4'-sulfate esters, using sulfur trioxide-trimethylamine complex. Desulfation of the sulfate esters using aryl sulfatase demonstrated that the rate of hydrolysis of the 3'-sulfate group was slower than either the 7-or 4' groups, thus allowing the specific synthesis of flavonol 3,3'-disulfates. The effects of ori/io-disulfation on the L1 C NMR spectra of flavonoids, and the regative FAB-MS spectra of di-and trisulfated flavonoids are discussed. 
  Reference    Z. Naturforsch. 43c, 631—635 (1988); received March 18 1988 
  Published    1988 
  Keywords    Flavonoid Sulfate Esters, Synthesis, 13 C NMR, FAB-MS, UV Spectra 
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 TEI-XML for    default:Reihe_C/43/ZNC-1988-43c-0631.pdf 
 Identifier    ZNC-1988-43c-0631 
 Volume    43 
9Author    M. Iinuma, T. Tanaka, M. Mizuno, E. WollenweberRequires cookie*
 Title    Unusual Flavanone from Encelia stenophylla  
 Abstract    A flavanone with 3'-OH as the sole B-ring substituent has been reported recently as a leaf and stem exudate constituent o f Encelia stenophylla. The correctness o f this unusual substitution is confirmed by synthesis o f this flavanone. 
  Reference    Z. Naturforsch. 45c, 135 (1990); received October 9 1989 
  Published    1990 
  Keywords    5, 7, 3'-Trihydroxy Flavanone, Unusual Substitution, Synthesis, Structure Confirmation 
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 TEI-XML for    default:Reihe_C/45/ZNC-1990-45c-0135_n.pdf 
 Identifier    ZNC-1990-45c-0135_n 
 Volume    45 
10Author    Ryszard Stolarski3, Zygmunt Kazimierczuk3, Piotr Lassotab, David Shugara-Requires cookie*
 Title    Acyclo Nucleosides and Nucleotides: Synthesis, Conformation and Other Properties, and Behaviour in Some Enzyme Systems, of 2',3'-Seco Purine Nucleosides, Nucleotides and 3 ':5'-Cyclic Phosphates, Analogues of cAMP and cGMP  
 Abstract    The 3':5'-cyclic phosphates of 2',3'-secoadenosine and guanosine, structural analogues of cAMP and cGMP, were synthesized by cyclization of the 5'-phosphates of 2',3'-secoadenosine and guanosine, respectively. The 2',3'-seco-3':5'-cAMP was converted to the IM P analogue by nitrous acid deamination, and to the 8-bromo analogue by bromination. Chemical phosphorylation of 2',3'-secoadenosine gave four products, the major one of which, in 50% yield, was 2',3'-seco-3':5'-cAMP, identical to that obtained by the cyclization reaction above. The three other products have been tentatively identified. The conformations in solution of the seco nucleosides, their 5'-monophosphates, and their 3':5'-cyclic phosphates, were determined with the aid of 'H , 13C and 31P N M R spectroscopy, particular attention being devoted to orientations about the C —O bonds and the glycosidic bond, and the results compared with crystallographic data available for the 2',3'-seco congener of ribofuranosyl benzimidazole. The findings are briefly discussed in relation to substrate and inhibitor properties in some enzyme systems. Some of the foregoing compounds have been examined as potential enzyme substrates and inhibitors. In particular, the seco 3':5'-cyclic phosphates are resistant to cAM P cyclic phos­ phodiesterase of mammalian origin, but are slowly hydrolyzed by purified higher plant cyclic nucleotide phosphodiesterase to the corresponding monophosphates. 
  Reference    Z. Naturforsch. 41c, 758—770 (1986); received March 17 1986 
  Published    1986 
  Keywords    2', 3'-Seco Cyclic Nucleotides, cAMP and cGMP Analogues, Synthesis, Phosphorylation, N M R and Conformation, Enzymology 
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 TEI-XML for    default:Reihe_C/41/ZNC-1986-41c-0758.pdf 
 Identifier    ZNC-1986-41c-0758 
 Volume    41