An electron spin resonance spectroscopic study of aminocarbonyl nitroxides. Long-range hyperfine splitting of amino substituents and conformational preferences around the C.alpha.-N(O) bond in aminocarbonyl tosylmethyl nitroxides
The carbamoylating agents carbamoylazides and carbamoyl cyanides (aka cyanoformamides) react with hydroxylamine in different ways, leading in the first case to N-hydroxyureas and, in the case of carbamoyl cyanides, to carbamoyl amidoxime derivatives. The synthetic procedure developed for the latter type of compound, which represents an interesting precursor for heterocyclic structures, allowed the
氨基甲酰基化剂氨基甲酰基叠氮化物和氨基甲酰基氰化物(又名氰基甲酰胺)以不同的方式与羟胺反应,在第一种情况下生成N-羟基脲,在氨基甲酰基氰化物的情况下,生成氨基甲酰基a肟肟衍生物。为后一种类型的化合物开发的合成方法代表了杂环结构的一种有趣的前体,可以高效地制备各种实例。在比较异丙基和苄基衍生物的实验值和计算出的13 C和15 N NMR化学位移值的基础上,提出了mid胺肟部分中双键的Z构型。
Nitrosocarbonyl hetero-Diels–Alder cycloaddition with 2-substituted 1,3-butadienes
作者:Robert B. Lewis、Javier Read de Alaniz
DOI:10.1016/j.tet.2016.11.046
日期:2017.7
A study of the reactivity of 2-substituted 1,3-butadienes with nitrosocarbonyl compounds in the 4+2 cycloaddition has been carried out showing that the regioselectivity involves a delicate balance of steric and electronic effects. 2-Aryl 1,3-butadienes favor the distal isomer with the magnitude of preference ranging from 4:1 to 15:1 depending on the nature of the nitrosocarbonyl group. However, when
A very mild and selective method for O-benzoylation of hydroxamic acids
作者:Yongsheng Zheng、Muqiong Liu、Yu Yuan
DOI:10.1016/j.tetlet.2014.06.009
日期:2014.7
Selective O-benzoylation of hydroxamic acids is achieved by the treatment of BPO and DABCO. Aliphaticalcohols are not reactive under these conditions. Various radical or oxidation sensitive functional groups are compatible with this protocol, and no anhydrous reagents or solvents are required for the high yields of the benzoylations.
Production of nitroxyl (HNO) at biologically relevant temperatures from the retro-Diels–Alder reaction of N-hydroxyurea-derived acyl nitroso-9,10-dimethylanthracene cycloadducts
作者:Yueping Xu、Maria-Michelle Alavanja、Veta L Johnson、Genichiro Yasaki、S.Bruce King
DOI:10.1016/s0040-4039(00)00670-5
日期:2000.6
of N-hydroxyurea-derived acyl nitroso compound-9,10-dimethylanthracene cycloadducts produce acyl nitroso compounds that react with nucleophiles to form nitrous oxide, which indicates the intermediacy of nitroxyl. These results identify these molecules as a new group of nitroxyldeliveryagents.
The present invention relates to new 4-carbamoyloxy-oxazaphosphorins of the general Formula I ##STR1## as well as to a method for the treatment of malign tumor diseases in humans using such compounds as active agent.