Synthesis and chemistry of 3-tert-butyl-1,5-diaminopyrazoleCCDC reference number 211651. See http://www.rsc.org/suppdata/ob/b3/b306058f/ for crystallographic data in .cif or other electronic format.
作者:Alexander J. Blake、David Clarke、Richard W. Mares、Hamish McNab
DOI:10.1039/b306058f
日期:——
N-Amination of 3-amino-5-tert-butylpyrazole 11 with hydroxylamine-O-sulfonic acid gave the 1,5-diaminopyrazole 12 with good regiochemical control. The reactions of 12 with certain electrophiles (e.g. acetic anhydride, DMF acetal, aromatic aldehydes, methoxymethylene Meldrum's acid) took place at one (or both) of the amino groups and no cyclised products were obtained. Reaction of 12 with carbon disulfide
用羟胺-O-磺酸对3-氨基-5-叔丁基吡唑11进行N-胺化,得到具有良好区域化学控制的1,5-二氨基吡唑12。12与某些亲电子试剂(例如乙酸酐,DMF乙缩醛,芳族醛,甲氧基亚甲基梅德鲁姆酸)的反应在一个(或两个)氨基上发生,未获得环化产物。12与二硫化碳反应,然后在碱性条件下烷基化,得到吡唑并[1,5-b] 1,2,4-三唑26,它是有用的照相品红色成色剂。12与1,2-和1,3-二羰基化合物(二酮和酮酸酯)的反应提供了新的吡唑并[1,5-b] 1,2,4-三嗪29、30、42和43及其第一衍生物吡唑并[1,5-b] 1,2,4-三氮杂system系统31和35-36。据报道,吡唑并氮杂卓33的X射线晶体结构。