通过N-氯-或N-溴-琥珀酰亚胺或卤素在苯甲酰胺肟上的作用,获得了O-(苯甲酰亚胺基)苯甲酰胺肟的盐。游离碱的乙酰化得到标题化合物,将其进行热环化,损失乙酰胺,得到3,5-二苯基-1,2,4-恶二唑。在二苯醚中,该反应的机理与O-乙酰基芳酰胺肟和O-芳酰基乙酰氨基肟的热环化非常相似,并且被认为涉及极性环化步骤,随后是速率确定质子转移。记录了32种肟,a胺肟和恶二唑衍生物的13 C Nmr光谱,并记录了肟,a胺肟的取代基化学位移,计算苯环上的O-乙酰基酰胺肟,5-甲基-1,2,4-恶二唑-3-基和3-甲基-1,2,4-恶二唑-5-基。
OOI NGAN SIM; OOI NGAN SIM; WILSON D. A., J. CHEM. SOC. PERKIN TRANS., 1980, PART 2, NO 12, 1792-1799
作者:OOI NGAN SIM、 OOI NGAN SIM、 WILSON D. A.
DOI:——
日期:——
Formation and thermal reaction of O-(N-acetylbenzimidoyl)benzamidoxime: comparison with the formation of 3,5-disubstituted 1,2,4-oxadiazoles from O-acetylarylamidoximes and O-aroylacetamidoximes
作者:Ngan Sim Ooi、David A. Wilson
DOI:10.1039/p29800001792
日期:——
Acetylation of the free base gave the title compound, which underwent a thermalcyclisation, with loss of acetamide, to give 3,5-diphenyl-1,2,4-oxadiazole. The mechanism of this reaction, in diphenyl ether, closely paralleled the thermalcyclisation of O-acetylarylamidoximes and O-aroylacetamidoximes, and is thought to involve a polar cyclisation step followed by rate-determining proton transfer. 13C N.m.r.
通过N-氯-或N-溴-琥珀酰亚胺或卤素在苯甲酰胺肟上的作用,获得了O-(苯甲酰亚胺基)苯甲酰胺肟的盐。游离碱的乙酰化得到标题化合物,将其进行热环化,损失乙酰胺,得到3,5-二苯基-1,2,4-恶二唑。在二苯醚中,该反应的机理与O-乙酰基芳酰胺肟和O-芳酰基乙酰氨基肟的热环化非常相似,并且被认为涉及极性环化步骤,随后是速率确定质子转移。记录了32种肟,a胺肟和恶二唑衍生物的13 C Nmr光谱,并记录了肟,a胺肟的取代基化学位移,计算苯环上的O-乙酰基酰胺肟,5-甲基-1,2,4-恶二唑-3-基和3-甲基-1,2,4-恶二唑-5-基。
Oxidation of arylamidoximes by hydrogen peroxide and horseradish peroxidase in water: Easy preparation and X-ray structure of O-(arylimidoyl)arylamidoximes
The oxidation of arylamidoximes X-C6H4C(NH2)NOH (X = H, Me, Cl, NO2, MeO) by H2O2 in the presence of horseradishperoxidase under mild conditions (phosphate buffer pH 7.4, room temperature) yields the corresponding O-(arylimidoyl)arylamidoximes in 30–70% yields. The structure of one of them is established by an X-ray analysis.
arylamidoximes的氧化XC 6 H ^ 4 C(NH 2)NOH(X = H,Me中,氯,NO 2,MEO)由H 2 Ó 2中辣根过氧化物酶的温和条件下在存在(磷酸盐缓冲液pH 7.4,室温下)以30-70%的产率产生相应的O-(芳基酰亚胺基)芳酰胺酶。其中之一的结构是通过X射线分析确定的。