- Herbicidal oxabicyclo ethers
-
The present invention relates to novel oxabicyclo ether derivative compounds, compositions containing these ether derivative compounds, and methods of using these compounds or compositions to control the growth of undesired vegetation. More particularly, the present invention relates to a variety of compounds, compositions, and methods of using them which are herbicidally active on a wide variety of weed species and exhibit safety to rice, cereals or broadleaf crops.
- -
-
-
- 7-Oxabicyclohept-2-ene and Related Materials by Reductive Elimination
-
The cycloadduct 1 of furan and (E)-1,2-bis(phenylsulfonyl)ethylene has been converted to various derivatives which in turn have been subjected to sodium amalgam reductive elimination conditions.Some of these procedures constitute useful methods for the preparation of the title olefin.The amalgam reduction of 1 provides modest yields of 7-oxabicyclohepta-2,5-diene.The cycloadduct of isobenzofuran and the reactive dienophile was prepared and subjected to analogous reactions.Various reaction steps which compete with reductive elimination have been identified.
- Mirsadeghi, Seid,Rickborn, Bruce
-
p. 4340 - 4345
(2007/10/02)
-
- 1,2-Thiazines and Related Heterocycles. Part 1. An Investigation of the Cycloadditions of N-Sulphinylanilines with 1,4-Epoxy-1,4-dihydronaphthalene and Other Alkenes
-
Evidence is adduced from the character of the alkenes which cycloadd to N-sulphinylanilines and from a kinetic investigation of the reactions of N-sulphinylanilines with 1,4-epoxy-1,4-dihydronaphthalene, examining the effects upon reaction rate of solvent polarity, temperature, and substitution in the N-sulphinylanilines, that the cycloadditions are pericyclic reactions of Diels-Alder type with inverse electron demand.A degree of charge separation in the transition state is indicated but this is small and confined essentially to the sulphinylaniline moiety.
- Hanson, Peter,Lewis, Robin J.,Stone, Thomas W.
-
p. 1719 - 1724
(2007/10/02)
-