2-氟-5-[(4-氧代-3,4-二氢二氮杂萘-1-基)甲基]苯甲酸是合成奥拉帕尼的关键中间体。以邻羧基苯甲醛为原料,与亚磷酸二甲酯反应得到磷叶立德,再与2-氟-5-甲酰基苯甲酸进行WittigHorner反应、环合反应得到目标化合物,并对各步反应条件进...2-氟-5-[(4-氧代-3,4-二氢二氮杂萘-1-基)甲基]苯甲酸是合成奥拉帕尼的关键中间体。以邻羧基苯甲醛为原料,与亚磷酸二甲酯反应得到磷叶立德,再与2-氟-5-甲酰基苯甲酸进行WittigHorner反应、环合反应得到目标化合物,并对各步反应条件进行了优化,三步反应总收率70.9%。目标化合物经(1 H NMR)和(MS)确证结构。展开更多
In this report the synthesis and characterization of chiral stationary phase of cellulose tris(3,5 dimethylphenylcarbamate) coated zirconia(CDMPC ZrO 2 CSP) was described. Direct optical resolutions of acidic racemate...In this report the synthesis and characterization of chiral stationary phase of cellulose tris(3,5 dimethylphenylcarbamate) coated zirconia(CDMPC ZrO 2 CSP) was described. Direct optical resolutions of acidic racemate naproxen and its derivatives on the phase were investigated. Surface property of zirconia affects the chiral separation of naproxen greatly. Naproxen could not be eluted from the column unless an acidic modifier was present in the mobile phase. However, good chiral resolutions were obtained for its ester derivatives. The influences of loading amount of stationary phase, molecular structure of compounds, type of alcohols as the modifier and their concentration in mobile phase on chiral resolution were studied. The chiral recognition mechanism of the chiral stationary phase was discussed.展开更多
文摘2-氟-5-[(4-氧代-3,4-二氢二氮杂萘-1-基)甲基]苯甲酸是合成奥拉帕尼的关键中间体。以邻羧基苯甲醛为原料,与亚磷酸二甲酯反应得到磷叶立德,再与2-氟-5-甲酰基苯甲酸进行WittigHorner反应、环合反应得到目标化合物,并对各步反应条件进行了优化,三步反应总收率70.9%。目标化合物经(1 H NMR)和(MS)确证结构。
文摘In this report the synthesis and characterization of chiral stationary phase of cellulose tris(3,5 dimethylphenylcarbamate) coated zirconia(CDMPC ZrO 2 CSP) was described. Direct optical resolutions of acidic racemate naproxen and its derivatives on the phase were investigated. Surface property of zirconia affects the chiral separation of naproxen greatly. Naproxen could not be eluted from the column unless an acidic modifier was present in the mobile phase. However, good chiral resolutions were obtained for its ester derivatives. The influences of loading amount of stationary phase, molecular structure of compounds, type of alcohols as the modifier and their concentration in mobile phase on chiral resolution were studied. The chiral recognition mechanism of the chiral stationary phase was discussed.
