使用衍生自稳定的螺硼酸酯,通过硼烷介导的单一异构体 ( E )- 和 ( Z ) -O-苄基肟醚的还原,合成了高对映体纯的 (1-芳基)-和 (1-萘基)-1-乙胺( S )-二苯基缬氨醇和乙二醇作为手性催化剂。伯 ( R )-芳基乙胺是通过使用 15% 的催化剂将纯 ( Z )-乙酮肟醚还原至 99% ee来制备的。描述了使用对映纯(1-萘-1-基)乙胺作为手性前体合成新的和已知的拟钙剂类似物的两种方便且容易的方法。
identified copper catalyst enables the formation of oxime radicals (N–O) by cleaving the O–H bond in ketoximes, followed by the radical addition to N-substituted maleimides. The oxime radicals (N–O) were detected and confirmed by EPR spectroscopy and variable-temperature 1H NMR. The simple one-pot reaction realizes the facile preparation of a variety of oximeether adduct products in moderate to good yields
已经实现了高效的Cu(II)催化的马来酰亚胺自由基加成。鉴定出的铜催化剂可通过裂解酮肟中的O-H键,然后将自由基添加到N-取代的马来酰亚胺中,从而形成肟自由基(N-O )。通过EPR光谱和可变温度1 H NMR检测并确认了肟自由基(NO )。简单的一锅反应可轻松制备中度到良好收率的各种肟醚加合物产物。
The compound represented by formula (1):
wherein
R
4
and R
5
each represents a hydrogen atom, a halogen atom, or a C1-C3 alkyl group; R
6
represents a C1-C4 alkyl group, a C3-C6 cycloalkyl group, or the like; R
7
, R
8
, and R
9
each represents a hydrogen atom, a halogen atom, or the like; R
10
represents a C1-C3 alkyl group, or the like; R
13
represents a C1-C3 alkyl group, or the like; and Q represents a phenyl group, or the like;
has an excellent control effect on pests.