Rotenonic acid

The use of sterile germinating seeds of Amorpha fruticosa has provided further information on the biosynthesis of amorphigenin(l 16). Administration of labelled 2, 4,4 -trihydroxychalcone (108), 7-hydroxy-4 -methoxyisoflavone (109 R = Me, formononetin), 7-hydroxy-2, 4, 5 -trimethoxyisoflavone (110), 9-methyImunduserone (111), rotenonic acid (112), or rotenone (115) to the seed system resulted in efficient conversion into amorphigenin (116), and the outline of a biosynthetic scheme for this compound has been proposed (Scheme 19). Of considerable interest was the fact that 7,4 -dihydroxyisollavone (109 R = H, daidzein) was not an efficient precursor, and this has been cited as... 

Pesticides, e.g. aminocarb, captan, difolatan, landrin, rotenone 200 °C, 45 min Induction of fluorescence in weakly [ fluorescent or nonfluorescent pesticides and amplification of natural fluoies-cence. There are some differences between basic and acidic aluminium oxide layers. 

Dimethoxysalicylic acid, see Rotenone 7V,7V-Dimethylacetoacetamide, see Dicrotophos Dimethylamine, see Diuron, MTV-Dimethylformamide,... 

Trithiolane, see Phorate Tubaic acid, see Rotenone Valeraldehyde, see Cyclohexanol, Pentane... 

A remarkable number of insecticidal plants seem to have been recognized first as fish poisons. This group has received special scientific attention for example, the already mentioned rotenone and other rotenoids of Perris and Lonchocarpus species (3-6), the lupine alkaloids of Sophora species (13), and a saponin (medicagenic acid) from Medlcago sativa leaves ( ). 

Dehydrorotenone 1 can be readily transformed into rotenone 2 by reduction of the chromone to the chromanol followed by Oppenauer oxidation. Two elegant syntheses of dehydrorotenone 1 used DCC as a key reagent as follows (i) treatment of derrisic acid 3 with DCC/EtjN followed by reaction of the intermediate thus obtained with sodium propanoate in ethanol gave 1. (ii) Condensation of tubaic acid 4 with the pyrrolidine enamine derived from 5 in the presence of DCC also gave 1. 

DIRECT. Use pyrethrin, rotenone, fatty acid or composite sprays before shoot or leaf malformations occur. 

This section will cover several widely used insecticidal products of natural origin, and also a growth promoting agent, gibberelUc acid. It discusses, in order, pyrethrum and pyrethrins, nicotine, rotenone, sabadiUa, bacillus thur-ingiensis, and gibbereUic acid. 

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