Efficient and Regioselective One-Pot Synthesis of 3-Substituted and 3,5-Disubstituted Isoxazoles
作者:Shibing Tang、Jinmei He、Yongquan Sun、Liuer He、Xuegong She
DOI:10.1021/ol901626n
日期:2009.9.3
A series of 3-substituted and 3,5-disubstitutedisoxazoles have been efficiently synthesized in moderate to excellent yields by the reaction of N-hydroxyl-4-toluenesulfonamide with α,β-unsaturated aldehydes/ketones. This novel strategy is associated with readily available starting materials, mild conditions, high regioselectivity, and wide scope.
Compounds of the formula
where Q is selected from various 5-membered heterocycles, which may optionally be substituted;
R is H, halogen, CH3, CF3, or OCH3;
X is Cl, CH3, OCH3, OCF2H or SCF2H;
Y is selected from various organic groups; and
Z is CH or H,
and their agriculturally suitable salts, exhibit potent herbicidal and plant growth regulant effects. The compounds may be formulated into herbicidal compositions in conventional manner.
The novel compounds may be prepared by reacting an appropriate aryloxysulfonyl isocyanate with the appropriate 2-amino-pyrimidine or 2-amino-1,3,5-triazine.
式中的化合物
其中 Q 选自各种五元杂环,可任选被取代;
R 是 H、卤素、CH3、CF3 或 O ;
X 是 Cl、 、O 、OCF2H 或 SCF2H;
Y 选自各种有机基团;以及
Z 是 CH 或 H、
以及它们在农业上适用的盐类,具有强效的除草和植物生长调节作用。这些化合物可按常规方法配制成除草组合物。
新型化合物可通过适当的芳氧基磺酰基异氰酸酯与适当的 2-氨基嘧啶或 2-氨基-1,3,5-三嗪反应制备。
[EN] 3-AZABICYCLO [3.1.0] HEXANE DERIVATIVES AS VANILLOID RECEPTOR LIGANDS<br/>[FR] DÉRIVÉS DE 3-AZABICYCLO[3.1.0]HEXANE UTILISÉS COMME LIGANDS DES RÉCEPTEURS VANILLOÏDES