In this paper,the dissolution and dissociation enthalpies of benzoic acid in ethanol water and isopropanol H 2O mixtures have been determined by two kinds of microcalorimeters respectively.Combined with the correspond...In this paper,the dissolution and dissociation enthalpies of benzoic acid in ethanol water and isopropanol H 2O mixtures have been determined by two kinds of microcalorimeters respectively.Combined with the corresponding Gibbs function changes existing in the literature,the dissolution and dissociation entropies have been calculated.Great efforts have been made to interpret the characteristic variations of the transfer enthalpies and entropies according to the skin phase model for solute solvent interactions and the structure alteration of the mixed solvents.展开更多
从5-氯-1-茚酮出发,用碳酸二甲酯(DMC)代替传统的有毒有害试剂作为甲氧羰基化试剂兼作溶剂,在NaH作用下,一步合成了5-氯-2-甲氧羰基-1-茚酮。考察了原料摩尔比、反应温度、滴加时间对产品质量和收率的影响。确定了最佳反应条件:n(5-氯-1...从5-氯-1-茚酮出发,用碳酸二甲酯(DMC)代替传统的有毒有害试剂作为甲氧羰基化试剂兼作溶剂,在NaH作用下,一步合成了5-氯-2-甲氧羰基-1-茚酮。考察了原料摩尔比、反应温度、滴加时间对产品质量和收率的影响。确定了最佳反应条件:n(5-氯-1-茚酮)∶n(NaH)=1∶3,反应温度90℃,滴加时间30 m in,收率达到86.09%。所得产品的结构经FTIR、1HNMR1、3CNMR和MS进行了表征。已在浙江宏元医药化工有限公司实施中试开发。展开更多
文摘In this paper,the dissolution and dissociation enthalpies of benzoic acid in ethanol water and isopropanol H 2O mixtures have been determined by two kinds of microcalorimeters respectively.Combined with the corresponding Gibbs function changes existing in the literature,the dissolution and dissociation entropies have been calculated.Great efforts have been made to interpret the characteristic variations of the transfer enthalpies and entropies according to the skin phase model for solute solvent interactions and the structure alteration of the mixed solvents.
文摘从5-氯-1-茚酮出发,用碳酸二甲酯(DMC)代替传统的有毒有害试剂作为甲氧羰基化试剂兼作溶剂,在NaH作用下,一步合成了5-氯-2-甲氧羰基-1-茚酮。考察了原料摩尔比、反应温度、滴加时间对产品质量和收率的影响。确定了最佳反应条件:n(5-氯-1-茚酮)∶n(NaH)=1∶3,反应温度90℃,滴加时间30 m in,收率达到86.09%。所得产品的结构经FTIR、1HNMR1、3CNMR和MS进行了表征。已在浙江宏元医药化工有限公司实施中试开发。