Arylaldoxime dehydrodimers 3a—1 have been prepared from the corresponding oximes 1a—1 by using (HCrO_4)_2(Py)_4Co as oxidant.Their structures were assigned to be bisnitrone by XPS studies. ESR studies of 3a—1 in ho...Arylaldoxime dehydrodimers 3a—1 have been prepared from the corresponding oximes 1a—1 by using (HCrO_4)_2(Py)_4Co as oxidant.Their structures were assigned to be bisnitrone by XPS studies. ESR studies of 3a—1 in hot chloroform show that iminoxy radicals 2a—1 are formed.Therefore the dehydrodimers can provide a convenient source of these radicals.展开更多
The reaction of m-chlorobenzaldoxime dehydrodimer with styrene gives two 1:1 adducts. The main product 7 is a bisnitrone. The minor product 8 has been shown by X-ray diffraction anal- ysis to possess the structure: Ar...The reaction of m-chlorobenzaldoxime dehydrodimer with styrene gives two 1:1 adducts. The main product 7 is a bisnitrone. The minor product 8 has been shown by X-ray diffraction anal- ysis to possess the structure: ArCH(N=O)CH_2CH (Ph)O--N=CHAr. The two C=N bonds are all in Z configuration. The structure of the adducts from benzaldoxime dehydrodimer and styrene is also assigned.展开更多
Three 1:1 adducts have been obtained by heating benzaldoxime dehydrodimer with styrene. The main product possesses the structure of bis-nitrone type. A radical addition mechanism is pro- posed.
文摘Arylaldoxime dehydrodimers 3a—1 have been prepared from the corresponding oximes 1a—1 by using (HCrO_4)_2(Py)_4Co as oxidant.Their structures were assigned to be bisnitrone by XPS studies. ESR studies of 3a—1 in hot chloroform show that iminoxy radicals 2a—1 are formed.Therefore the dehydrodimers can provide a convenient source of these radicals.
文摘The reaction of m-chlorobenzaldoxime dehydrodimer with styrene gives two 1:1 adducts. The main product 7 is a bisnitrone. The minor product 8 has been shown by X-ray diffraction anal- ysis to possess the structure: ArCH(N=O)CH_2CH (Ph)O--N=CHAr. The two C=N bonds are all in Z configuration. The structure of the adducts from benzaldoxime dehydrodimer and styrene is also assigned.
文摘Three 1:1 adducts have been obtained by heating benzaldoxime dehydrodimer with styrene. The main product possesses the structure of bis-nitrone type. A radical addition mechanism is pro- posed.
