会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明授权
    • PROCESS FOR PREPARING ALKYL 2-[3-[3-[(2E)-(7-CHLORO-QUINOLIN-2-YL)VINYL]PHENYL]-3(S)-HYDROXYPROPYL]BENZOATE
    • 制备2- [3- [3 - [(2E) - (7-氯 - 喹啉-2-基)乙烯基]苯基] -3(S) - 羟基丙基]苯甲酸酯的方法
    • KR100763771B1
    • 2007-10-09
    • KR20060056458
    • 2006-06-22
    • CHO DONG OCK
    • CHO DONG OCKCHA KYEONG HOIHA HYUNG HO
    • C07D215/18
    • A process for preparing alkyl 2-[3-[3-[(2E)-(7-chloro-quinolin-2-yl)vinyl]phenyl]-3(S)-hydroxypropyl]benzoate is provided to improve economical efficiency by using inexpensive reagents, and enhance preparation yield by performing reaction under mild condition. A process for preparing alkyl 2-[3-[3-[(2E)-(7-chloro-quinolin-2-yl)vinyl]phenyl]-3(S)-hydroxypropyl]benzoate represented by the formula(1) comprises the steps of: (i) oxidizing isochromene represented by the formula(2) to prepare 1-isochromenone represented by the formula(3); (ii) ring-opening reacting the 1-isochromenone represented by the formula(3) under bromic acid and iodide catalyst, and reacting the resulting product with alcohol compound represented by R-OH to prepare benzoic acid ester derivatives represented by the formula(4); and (iii) Grignard-reacting the benzoic acid ester derivatives represented by the formula(4) with benzoaldehyde derivatives represented by the formula(5), wherein R is C1-C15 alkyl group, phenyl group or benzyl group.
    • 提供了制备2- [3- [3 - [(2E) - (7-氯 - 喹啉-2-基)乙烯基]苯基] -3-(S) - 羟丙基]苯甲酸的方法,以通过使用 廉价的试剂,并通过在温和条件下进行反应来提高制备产率。 由式(1)表示的2- [3- [3 - [(2E) - (7-氯 - 喹啉-2-基)乙烯基]苯基] -3(S) - 羟丙基]苯甲酸酯的制备方法包括 步骤:(i)氧化由式(2)表示的异色烯以制备由式(3)表示的1-异色烯酮; (ii)在溴酸和碘化物催化剂下使由式(3)表示的1-异色烯酮开环反应,并使所得产物与由R-OH表示的醇化合物反应,制备由式(4)表示的苯甲酸酯衍生物 ); 和(iii)使由式(4)表示的苯甲酸酯衍生物与由式(5)表示的苯甲醛衍生物进行格氏反应,其中R是C1-C15烷基,苯基或苄基。
    • 2. 发明授权
    • PROCESS FOR PREPARING CHIRAL INTERMEDIATES USEFUL IN SYNTHESIS OF ATORVASTATIN
    • 制备合成ATORVASTATIN的手术中间体的方法
    • KR100763770B1
    • 2007-10-08
    • KR20060048194
    • 2006-05-29
    • CHO DONG OCK
    • CHO DONG OCKKIM YEONG SOOKHA HYUNG HO
    • C07C205/42C07C205/14
    • A method for preparing t-butyl (R)-7-nitro-5-hydroxy-3-oxo-heptanoates is provided to produce chiral intermediates useful in a synthesis of atorvastatin in an economical and efficient manner. A method for preparing t-butyl (R)-7-nitro-5-hydroxy-3-oxo-heptanoates comprises the steps of: (i) subjecting (S)-3-hydroxy-butylactone represented by the formula 2 to a decyclization reaction in the presence of an iodine catalyst, acetic acid, ethanol, and hydrogen bromide, followed by reacting the resultant with nitromethane(CH3NO2) to prepare ethyl (R)-5-nitro-3-hydroxypentanoates represented by the formula 3; and (ii) subjecting the ethyl (R)-5-nitro-3-hydroxypentanoates represented by the formula 3 and t-butyl bromoacetate(BrCH2COOt-Bu) to a Grignard reaction using zinc or magnesium to prepare t-butyl (R)-7-nitro-5-hydroxy-3-oxo-heptanoates represented by the following formula 1.
    • 提供了制备(R)-7-硝基-5-羟基-3-氧代庚酸叔丁酯的方法,以便以经济和有效的方式制备可用于合成阿托伐他汀的手性中间体。 制备(R)-7-硝基-5-羟基-3-氧代 - 庚酸叔丁酯的方法包括以下步骤:(i)使由式2表示的(S)-3-羟基丁基内酯进行二环化 在碘催化剂,乙酸,乙醇和溴化氢的存在下进行反应,然后使所得物与硝基甲烷(CH 3 NO 2)反应,制备由式3表示的(R)-5-硝基-3-羟基戊酸乙酯; 和(ii)使用锌或镁处理由式3表示的(R)-5-硝基-3-羟基戊酸乙酯和溴乙酸叔丁酯(BrCH 2 COOt-Bu)进行格氏反应,制备(R) - 由下式1表示的7-硝基-5-羟基-3-氧代 - 庚酸酯。