BIOLOGICALLY ACTIVE NATURAL PRODUCTS: AGROCHEMICALS - CHAPTER 14 pps

... LLC 14 Natural Products Containing Phenylalanine as Potential Bioherbicides Mikhail M. Bobylev, Ludmila I. Bobyleva, and Gary A. Strobel CONTENTS 14. 1 Introduction 14. 2 Maculosin-I and -II 14. 3 ... maculosin-2, in contrast to uniquely selective mac- ulosin-1, possesses a broad spectrum herbicide activity. We tested maculosin-2 first on more closely related to spotted knapweed plants...

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... plants confirmed its association with L-3,4-dihy- droxyphenylalanine (L-DOPA). It is well known that velvetbean seeds contain a high con- centration of L-DOPA (6 to 9%), 20,21 which plays a role ... R. 1937. Isolation of L-3,4-dihydroxyphenylalanine from the seeds of Mucuna pruriens. Biochem. J., 31, 214 9-2 152. 21. Rehr, S.S., Janzen, D.H., and Feeny, P.P. 1973. L-Dopa in legume seeds: a...

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... hyperoside, quercetin 4 - -xyloside, 3-methylquercetin 3 - -xyloside 19 Dienoic, trienoic, and tetraenoic acids 20 α-aminoadipic acid 21 β-sitosterol, gallic acid, 1-hexacosanol 22 Nupharin, ... gallic acid, myricitrin, myricetin, 1,2,3,4,6-pentagalloyl- D-glucose, and 2,3,4,6-tetragalloyl-D-glucose. Examination of alkaloids from N. lutea showed 6,6′-dihydroxythiobinupharidine to be high...

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... natural compounds: (24R )-1 4α-methyl-5α-ergostan-3-one; 14 -methyl-5α-cholestan-3-one; cycloart-5-ene- 3β,25-diol; cycloart-3β,25-diol; 4α-methylergostan-5-ene-3β-ol; stigmast-4,22-dien-6β-ol- 3- one ... stigmast-4,22-dien-6β-ol- 3- one and 24-phenylethyl-cholest-3,6-dione were identified; together with several known compounds: (24R)-stigmast-4-ene-3-one; ergost-4-ene-3-one; (24R)-...

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... analog, L-(N 5 -phosphono)methionine-S-sulfoximine (PMSO) (see Figure 9.8) is a potent GS inhibi- tor and a metabolite of L-(N 5 -phosphono)methionine-S-sulfoximinyl-L-ala-L-ala (PMSO- Ala-Ala) 76 ... situations. 146 Mixtures of glufosinate alone and glufosinate plus several other herbicides (pendimetha- lin [N-(1-ethylpropyl )-3 ,4-dimethyl-2,6-dinitrobenzenamine]; thiobencarb [S-[(4-ch...

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... identified as 4-isopropylbenzyl alcohol (3) and a new compound, (+)-euca- malol (4) (3-formyl-6-isopropyl-2-cyclohexen-1-ol) (Watanabe et al., 1993) as shown in Figure 11.2. The mosquito-repelling ... repellency and repellent dura- bility against mosquitoes, Aedes albopictus and Culex pipiens. In addition, (+)-eucamalol, (1R, 6R )-( + )-3 -formyl-6-isopropyl-2-cyclohexene-1-ol, which is a...

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... substance or (E )-9 -oxo-2-decenoic acid (9-ODA) (II), appears to be synergized by other compounds pro- duced in the mandibular glands. 19 One of these,(E )-9 -hydroxy-2-decenoic acid (9-HDA) (III), ... to possess great multifunctionality as defensive compounds. 12.2.4 2-Alkyl-6-Methylpiperidines Mixtures of cis- and trans-2-alkyl-6-methylpiperidines have been identified as poison gland p...

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... 2-( 4-dichlorophenoxy) phe- noxy-methyl propanoate, Hoelon ® , 1974; Butyl 2-[ 4-( 5-trifluoro-2-pyridyloxy)phenoxy] propionate, Fusilade ® , 1980; Methyl 2-( 4-( (3-chloro-5-trifluoromethyl )-2 -pyridinyloxy )- phenoxy) ... ajmaline, serpentine, and serpertinine. 3-5 Of these, reserpine, 11,17α-dimethyoxy-18 -[ (3,4,5-trimethoxybenzoyl) oxy ]-3 β, 20α-yohimban-1 6- -c...

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... silica gel using hex- ane-EtOAc, mixtures of increasing polarity consisting of four kaurenoid carboxylic acids: (–)-kaur-16-en-19-oic acid (28), (–)-grandifloric acid, (–)-angeloylgrandifloric ... acids: (–)-kaur-16-en-19-oic acid (28), (–)-grandifloric acid, (–)-angeloylgrandifloric acid (29), and the (– )-1 7-hydroxy-16β-kauran-19-oic acid (30) (Figure 2.7). In general, clear inhibitory effec...

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... derivatized to yield the herbicides dicamba (3,6-dichloro- 2-methoxybenzoic acid) and chloramben (3-amino-2,5-dichlorobenzoic acid). The allelo- pathic terpenoid 1,8-cineole has served as a model for the ... but has not yet been released. 1 4-1 6 5.2 Tree-of-Heaven (Ailanthus altissima) Tree-of-heaven (Ailanthus altissima, Simaroubaceae) has been known since the work of Mer- gen in 1959 to...

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