Synthesis and some spectral characteristics of bicyclic phosphate, GABA antagonists.
作者:Yoshihisa OZOE、Morifusa ETO
DOI:10.1271/bbb1961.46.411
日期:——
Bicyclic phosphates (BPs), GABA antagonists, were prepared by reaction of the corresponding triols with phosphoryl chloride. The triols were obtained by one of the following methods: (a) the Tollens condensation of an aldehyde possessing α-hydrogen atoms with formaldehyde; (b) the basecatalyzed hydroxymethylation of alkylmalonates or α-alkylacetoacetates with paraformaldehyde, followed by reduction; (c) the reduction of diethyl pivaloylmalonate; or (d) the halogenation of pentaerythritol. Some BPs were also derived by modification of the functional groups of BP homologs. The 1H-NMR spectra of 4-substituted BPs showed a characteristic doublet peak due to the endocyclic methylene protons, the shift position of which was affected by the electronic nature of the bridgehead substituent. The mass spectra of the PBs were characterized by peaks due to the loss of CH2O from the ring.
双环磷酸酯(BPs),即GABA拮抗剂,是通过相应的三醇与磷酰氯反应制备的。这些三醇是通过以下方法之一获得的:(a)具有α氢原子的醛与甲醛的Tollens缩合;(b)以多聚甲醛为反应物的烷基丙二酸酯或α-烷基乙酰乙酸酯的碱催化羟甲基化反应,随后进行还原;(c)二乙基特戊酰基丙二酸酯的还原;或(d)季戊四醇的卤化。一些BPs还可通过BP同系物的官能团修饰得到。4-取代的BPs的1H-NMR谱显示出由于内环亚甲基质子引起的特征双重峰,其位移位置受桥头取代基的电子性质影响。BPs的质谱特征在于环失CH2O的峰。