A cutting or grinding oil composition comprising (A) a base oil and (B) at least one compound selected from the group consisting of dibasic acids having 2 to 6 carbon atoms, tribasic acids having 3 to 6 carbon atoms, and ester derivatives of these acids; and a cutting or grinding oil composition comprising component (A) described above, component (B) described above, (C) a compound containing sulfur, and/or (D) at least one compound selected from the group consisting of perbasic alkali metal sulfonates and perbasic alkaline earth metal sulfonates are disclosed. By using the oil composition, increase in working efficiency, such as suppressed wear of working tools and superior precision of a finished surface, can be achieved.
[EN] The invention is directed to saturated fused [1,2-b]pyridazinone compounds and pharmaceutical compositions containing such compounds that are useful in treating infections by hepatitis C virus. [FR] L'invention concerne des composés [1,2-b]pyridazinone condensés saturés et des compositions pharmaceutiques contenant de tels composés qui sont utiles dans le traitement d'infections par le virus de l'hépatite C.
The joint action of trisdimethylaminophosphine (TDAP) and carbon tetrachloride on some vicinal diols
作者:R. Boigegrain、B. Castro
DOI:10.1016/0040-4020(76)80083-x
日期:1976.1
The joint action of trisdimethylaminophosphine and carbontetrachloride on vicinal diols affords either trans epoxides or spirophosphoranes. The mutarotation of these spirophosphoranes is described by 1H NMR and 31P NMR spectra. The mechanism of reaction providing either epoxides or spirophosphoranes is discussed.
三二甲基氨基膦和四氯化碳对邻位二醇的联合作用提供反式环氧化物或螺正膦。通过1 H NMR和31 P NMR光谱描述了这些螺磷腈的诱变。讨论了提供环氧化物或螺磷杂环戊烷的反应机理。