作者:Daryl A. Guthrie、Anthony Ho、Cyrus G. Takahashi、Anthony Collins、Matthew Morris、John P. Toscano
DOI:10.1021/jo502330w
日期:2015.2.6
A new and versatile class of HNO donors, the (hydroxylamino)pyrazolone (HAPY) series of HNO donors utilizing pyrazolone (PY) leaving groups, is described. HNO, the smallest N-based aldehyde equivalent, is used as a reagent along with a variety of PY compounds to synthesize the desired HAPY donors in what can be considered an N-selective HNO-aldol reaction in up to quantitative yields. The bimolecular
描述了一种新型的多功能HNO供体,即利用吡唑啉酮(PY)离开基团的HNO供体的(羟胺基)吡唑啉酮(HAPY)系列。HNO(最小的N基醛当量)与各种PY化合物一起用作试剂,可以合成N-选择性HNO-醛醇缩合反应中所需的HAPY供体,且定量产率最高。在37°C的pH 7.4磷酸盐缓冲液中,HNO与PY的双分子速率常数可以达到8×10 5 M –1 s –1。在1在核磁共振实验中,HAPY化合物在生理学相关条件下定量生成HNO(以膦氮杂氮膦形式捕获),半衰期跨度为3个数量级(数分钟至数天)。B3LYP / 6-31G *计算证实了HNO与PY烯醇和烯醇化物之间在能量上有利的反应,而HNO的释放预计会通过每种HAPY化合物的氧阴离子(O HN-PY)发生。HNO已被证明可以为心脏衰竭提供功能支持。