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Structures and pesticidal activities of derivatives of dinitrophenols. XII. — In vitro activity of C 3 to C 13 α‐branched alkyldinitro‐phenols and their esters and ethers against the spores of Venturia inaequalis and other fungi
Author(s) -
Pianka M.
Publication year - 1968
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740191115
Subject(s) - venturia inaequalis , botrytis cinerea , phenols , chemistry , organic chemistry , isopropyl , alkyl , penicillium expansum , botrytis , botany , biology , fungicide , postharvest
Abstract The activity in vitro of 2‐(C 3 to C 13 α‐branched alkyl)‐4,6‐dinitrophenols and 4‐(C 4 to C 13 α‐branched alkyl)‐2,6‐dinitrophenols and of their various esters and ethers was determined against the spores of Venturia inaequalis (Cooke) Wint., Botrytis cinerea Pers., Fusarium bulbigenum , Cooke & Massee, var. lycopersici (Brushi) Wollenw. and Cercospora melonis Cooke. Several alkyldinitrophenols were highly active against Venturia and the 2‐alkylphenols were generally more active than the 4‐alkylphenols. The alkyldinitrophenols were not effective against the spores of Botrytis, Fusarium and Cercospora. . Esterification of several lower alkyldinitrophenols to methyl carbonates gave compounds with enhanced activity, but methyl carbonates of C 7 to C 11 alkyl dinitrophenols showed considerably reduced activity. Esterification to ethyl‐ or other alkyl‐carbonates gave compounds with considerably reduced activity against Venturia. Esterification of 2‐isopropyl‐ and 2‐t‐butyl‐4,6‐dinitrophenols to crotonates gave compounds with enhanced activity against Venturia , but crotonates of other phenols showed reduced activity. The acrylates of several C 6 to C 8 alkyl dinitrophenols proved highly active. Ethers of active phenols showed considerably reduced activity.