Result 1 - 7 of total 7
CHIMIA, Vol 74, Iss 1-
2020 Volume 2
| Keywords | Chemistry ; QD1-999 |
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| Language | German |
| Publishing date | 2020-02-01T00:00:00Z |
| Publisher | Swiss Chemical Society |
| Document type | Article ; Online |
| Database | BASE - Bielefeld Academic Search Engine (life sciences selection) |
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CHIMIA, Vol 71, Iss
Source of Innovation
2017 Volume 12
| Keywords | Chemistry ; QD1-999 |
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| Language | German |
| Publishing date | 2017-12-01T00:00:00Z |
| Publisher | Swiss Chemical Society |
| Document type | Article ; Online |
| Database | BASE - Bielefeld Academic Search Engine (life sciences selection) |
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CHIMIA, Vol 70, Iss
Chirality, Upsides for Chemical Innovation
2016 Volume 3
| Keywords | Asymetric catalysis ; Chirality ; Chemistry ; QD1-999 |
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| Language | German |
| Publishing date | 2016-03-01T00:00:00Z |
| Publisher | Swiss Chemical Society |
| Document type | Article ; Online |
| Database | BASE - Bielefeld Academic Search Engine (life sciences selection) |
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CHIMIA, Vol 73, Iss 7-
2019 Volume 8
Abstract: Strigolactones have been known as signaling molecules in the rhizosphere of plants since more than 50 years. However, their roles as phytohormone have been only recognized since 2008. We describe here a very efficient synthetic access to representative ... ...
| Abstract | Strigolactones have been known as signaling molecules in the rhizosphere of plants since more than 50 years. However, their roles as phytohormone have been only recognized since 2008. We describe here a very efficient synthetic access to representative canonical strigolactones displaying the A-B-C-D tetracyclic structure and to non-canonical strigolactones as carlactonoic acid and methyl carlactonoate. In addition, we report the design and the synthesis of strigolactams as promising derivatives of strigolactones for potential use in modern agriculture. Among the synthetic methods developed for this project, the intramolecular [2+2] cycloaddition of keteneiminium salts to C=C bond has been particularly useful to the synthesis of natural strigolactones and their potentially improved analogues. |
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| Keywords | Crop enhancement ; Keteneiminium salts ; Seed germination ; Strigolactones ; Total synthesis ; Chemistry ; QD1-999 |
| Subject code | 540 |
| Language | German |
| Publishing date | 2019-08-01T00:00:00Z |
| Publisher | Swiss Chemical Society |
| Document type | Article ; Online |
| Database | BASE - Bielefeld Academic Search Engine (life sciences selection) |
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Tetrahedron letters. 2014 Apr. 09, v. 55, no. 15
2014
Abstract: An intramolecular 6π/10π-electrocyclization from ketene-iminium salts was developed for the preparation of naphthylamines. Various substituents on the nitrogen, on the aromatic ring, and on the olefin were studied. Tricyclic skeletons were obtained in ... ...
| Abstract | An intramolecular 6π/10π-electrocyclization from ketene-iminium salts was developed for the preparation of naphthylamines. Various substituents on the nitrogen, on the aromatic ring, and on the olefin were studied. Tricyclic skeletons were obtained in few steps and good overall yields. The electrocyclization of ketene-iminium salts has been computationally explored by means of DFT calculations and their activation barriers were compared to the parent triene as well as the corresponding dienyl allenes and dienyl ketenes. Electrocyclizations for ketene-iminium salts were shown to be highly exergonic and have much smaller barriers to activation. |
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| Keywords | aromatic compounds ; chemical reactions ; chemical structure ; nitrogen ; olefin ; salts |
| Language | English |
| Dates of publication | 2014-0409 |
| Size | p. 2446-2449. |
| Publishing place | Elsevier Ltd |
| Document type | Article |
| ZDB-ID | 204287-3 |
| ISSN | 1873-3581 ; 0040-4039 |
| ISSN (online) | 1873-3581 |
| ISSN | 0040-4039 |
| DOI | 10.1016/j.tetlet.2014.02.135 |
| Database | NAL-Catalogue (AGRICOLA) |
| Zs.A 2837: Show issues | Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (2.OG) ab Jg. 2022: Lesesaal (EG) |
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Pest management science. 2016 Nov., v. 72, no. 11
2016
Abstract: BACKGROUND: Strigolactones play an important role in the rhizosphere as signalling molecules stimulating the seed germination of parasitic weed seeds and hyphal branching of arbuscular micorrhiza, and also act as hormones in plant roots and shoots. ... ...
| Abstract | BACKGROUND: Strigolactones play an important role in the rhizosphere as signalling molecules stimulating the seed germination of parasitic weed seeds and hyphal branching of arbuscular micorrhiza, and also act as hormones in plant roots and shoots. Strigolactone derivatives, e.g. strigolactams, could be used as suicidal germination inducers in the absence of a host crop for the decontamination of land infested with parasitic weed seeds. RESULTS: We report the stereoselective synthesis of novel strigolactams, together with some of their critical physicochemical properties, such as water solubility, hydrolytic stability, as well as their short soil persistence. In addition, we show that such strigolactams are potent germination stimulants of O. cumana parasitic weed seeds and do not affect the seed germination and the root growth of sunflower. CONCLUSIONS: The novel strigolactam derivatives described here compare favourably with the corresponding GRâ28 strigolactones in terms of biological activity and physicochemical properties. However, we believe strigolactone and strigolactam derivatives require further structural optimisation to improve their soil persistence to demonstrate a potential for agronomical applications. © 2016 Society of Chemical Industry |
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| Keywords | Helianthus annuus ; Orobanche cernua ; bioactive properties ; decontamination ; hormones ; host plants ; parasitic plants ; pest management ; rhizosphere ; roots ; seed germination ; seeds ; shoots ; soil ; stereoselective synthesis ; strigolactones ; water solubility |
| Language | English |
| Dates of publication | 2016-11 |
| Size | p. 2054-2068. |
| Publishing place | John Wiley & Sons, Ltd |
| Document type | Article |
| Note | JOURNAL ARTICLE |
| ZDB-ID | 2001705-4 |
| ISSN | 1526-4998 ; 1526-498X |
| ISSN (online) | 1526-4998 |
| ISSN | 1526-498X |
| DOI | 10.1002/ps.4268 |
| Database | NAL-Catalogue (AGRICOLA) |
| Z 2731: Show issues |
This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.
Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.
CHIMIA, Vol 68, Iss
2014 Volume 9
Abstract: Seed germination and early seedling development are essential events in the plant life cycle that are controlled largely by the interplay and cross-talk between several plant hormones. Recently, major progress has been achieved in the elucidation at the ... ...
| Abstract | Seed germination and early seedling development are essential events in the plant life cycle that are controlled largely by the interplay and cross-talk between several plant hormones. Recently, major progress has been achieved in the elucidation at the molecular level of the signalling of these phytohormones. In this review, we summarise the data for the most promising classes of compounds, which could find potential agronomic applications for promoting seed germination and early seedling development even under abiotic stress conditions. Structural modifications of plant hormones are required to improve their biological performance and their specificity to allow commercial application. |
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| Keywords | Brassinosteroids ; Gibberellins ; Karrikins ; Seed germination ; Strigolactones ; Chemistry ; QD1-999 |
| Language | German |
| Publishing date | 2014-09-01T00:00:00Z |
| Publisher | Swiss Chemical Society |
| Document type | Article ; Online |
| Database | BASE - Bielefeld Academic Search Engine (life sciences selection) |
Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.