Photocycloaddition of Isocoumarins and Isothiocoumarins to Alkenes
摘要:
On irradiation in the presence of tetrachloroethene (TCE), both isocoumarins 3 and isothiocoumarins 4 afford in high yields the cis-fused cycloadducts 8 and 9, while only the oxacycles 3 undergo photocycloaddition to 2,3-dimethylbut-2-ene (TME) to give mixtures of cis- and trans-fused products 10 and 11, respectively, in moderate yields. This higher efficiency in reacting with TCE as compared to TME for compounds 3 and 4 contrasts the behavior of simple cyclic enones, e.g., 5,5-dimethylcyclohex-2-enone (12), which is converted to bicyclooctanones about fifty times faster with TME than with TCE.
[EN] MOLECULES HAVING CERTAIN PESTICIDAL UTILITIES, AND INTERMEDIATES, COMPOSITIONS, AND PROCESSES RELATED THERETO<br/>[FR] MOLÉCULES PRÉSENTANT CERTAINES UTILITÉS PESTICIDES, ET INTERMÉDIAIRES, COMPOSITIONS ET PROCÉDÉS ASSOCIÉS
申请人:CORTEVA AGRISCIENCE LLC
公开号:WO2022132609A1
公开(公告)日:2022-06-23
This disclosure relates to compounds having pesticidal utility against pests in phyla Nematoda, Arthropoda, and/or Mollusca, processes to produce such compounds and intermediates used in such processes, compositions containing such compounds, and processes of using such compounds against such pests. These compounds/molecules may be used, for example, as nematicides, acaricides, insecticides, miticides, and/or molluscicides. This document discloses compounds having the following formula (One).
On irradiation in the presence of tetrachloroethene (TCE), both isocoumarins 3 and isothiocoumarins 4 afford in high yields the cis-fused cycloadducts 8 and 9, while only the oxacycles 3 undergo photocycloaddition to 2,3-dimethylbut-2-ene (TME) to give mixtures of cis- and trans-fused products 10 and 11, respectively, in moderate yields. This higher efficiency in reacting with TCE as compared to TME for compounds 3 and 4 contrasts the behavior of simple cyclic enones, e.g., 5,5-dimethylcyclohex-2-enone (12), which is converted to bicyclooctanones about fifty times faster with TME than with TCE.
Izumi, Taeko; Nishimoto, Yasuhiro; Kohei, Kunihiro, Journal of Heterocyclic Chemistry, 1990, vol. 27, # 5, p. 1419 - 1424