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Advances in Pesticide Science: Abstract and Addendum by H. Geissbühler, P. C. Kearney and G. T. Brooks (Eds.)

By H. Geissbühler, P. C. Kearney and G. T. Brooks (Eds.)

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4. Even sterically hindered amines (2,4-diisopropylaniline) or amines with weak basicity (3,5-dichloroaniline) give good yields. V. Fliege and H. g. formaldehyde or carbon monoxide, represent a technically important synthesis principle which has been used for building up a series of useful intermediates for potential biologically active compounds· In nature, 3-methyl-3-buten-1-ol, in the form of its pyrophosphate, participates in the biosynthesis of terpenee and steroids. It is formed from 3 moles of acetyl-coenzyme-A.

8) and a mixture of benzene 1 acetic acid (98:2) for elution. The oxidation of the P=S linkage provides a convenient method for the preparation of the oxon, which cannot be otherwise synthesized with an acceptable yield and degree of purity. G. Mattern, W. Traber, W. Zwahlen; K. RUfenacht, H. F. Moser, H. Kny; H. Greuter, D. , CH-4002 Basel, Switzerland and N. Clauson-Kaas DK-3520 Farum, Denmark 1-203 METHODS FOR THE PREPARATION OF AZAMETHIPHOS (ALFACRON^) , A NEW HETEROCYCLIC PHOSPHORIC ESTER Azamethiphos, a new pyridine-type phosphoric ester with an excellent low mammalian toxicity and a broad insecticidal activity, gave a lot of problems for its synthesis: c tX> CH 2 -S-P(OCH 3 ) 2 In spite of many theoretically possible synthetic methods for the production of azamethiphos, only two of them have shown to be useful in regard to the solution of economical, ecological and technical problems.

I : M = Mg, Zn, Cd, Al; a = 2, 3; b = 2, 3, 4, 5, 6; L = 0-, S-, N-, P-donor. II : M = Na, K, Ν ^ ; M = Zn, Cd; c = 1, 2; d = 3> 4; c = 1, 2, 3, 4, 5; L = analogous I. Ill : M = ΝΗ^, K; M = Al; X = Cl, Br; c = 1, 2, 3; g = 3, 2, 1; h = 1, 3} L = 0-, Ndonor. IV : M = Mfe, Al; X = Cl, Br, J; i = 1 or 2; j = 2 or 1 ; k = 1, 2, 4, 6; L = 0-, N-donor. V : 1 = 1 and 2; L = N-donor. 3«4-oxdiazoles, substituted 1·3·5-triazines (simazine, atrazine, prometryne, and other), methylthiocyanate, methylisothiocyanate, phenylisothiocyanate, triphenylphosphine, various carbamates and thiocarbamates.

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