开发了一种通过金( I )催化剂合成2-吡啶酮醇的高效方法。确定了甲磺酸对金催化剂的反应进程的影响。所提出的机制涉及分别源自2-炔丙基氧基吡啶和 2-(but-3-yn-1-yloxy)吡啶的氮的 5- exo-dig和 6 -exo-dig加成的分子内环化产物形成。由金 ( I ) 催化剂和甲磺酸形成的吡啶盐在弱碱性介质(5% Na 2 CO 3水溶液)中发生重排反应,形成N-烯基吡啶酮醇。N使用这种方法可以以中等至极好的收率获得-烯基吡啶酮醇。
开发了一种通过金( I )催化剂合成2-吡啶酮醇的高效方法。确定了甲磺酸对金催化剂的反应进程的影响。所提出的机制涉及分别源自2-炔丙基氧基吡啶和 2-(but-3-yn-1-yloxy)吡啶的氮的 5- exo-dig和 6 -exo-dig加成的分子内环化产物形成。由金 ( I ) 催化剂和甲磺酸形成的吡啶盐在弱碱性介质(5% Na 2 CO 3水溶液)中发生重排反应,形成N-烯基吡啶酮醇。N使用这种方法可以以中等至极好的收率获得-烯基吡啶酮醇。
Compounds of formula I wherein the substituents R
1
, R
2
, R
3
, and R
4
and the suffixes n and m are defined in claim 1, and the agrochemically acceptable salts and all stereoisomers and tautomers of those compounds are suitable for use as herbicides.
Compounds of formula (I) wherein the substituents R
1
, R
2
, R
3
and R
4
, and the suffixes n and m are as defined in claim
1,
and agrochemically acceptable salts and all stereoisomers and tautomers of such compounds are suitable for use as herbicides.
1
rearrangement of 2-propargyloxypyridine and 2-(but-3-yn-1-yloxy)pyridine under acidic conditions. This approach exhibits significant utility due to its outstanding efficiency of conversion in the synthesis of secondary amines as a one-pot reaction. The initial step of the method involves a cyclization reaction for the production of pyridinium salts, followed by the next stage, where rearrangement is