首页>
外国专利>
METHOD FOR ASYMMETRIC SYNTHESIS OF CHROMANONE RING COMPOUND AND SYNTHESIZING METHOD OF CALOPHYLLUM COUMARIN
METHOD FOR ASYMMETRIC SYNTHESIS OF CHROMANONE RING COMPOUND AND SYNTHESIZING METHOD OF CALOPHYLLUM COUMARIN
展开▼
机译:环烯酮环化合物的不对称合成方法和香豆素香豆素的合成方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
PROBLEM TO BE SOLVED: To achieve a novel, practical and efficient stereoselective asymmetric synthesis of a four-ring coumarin compound, which is expected for its physiological activity and for its use in drug discovery, and to achieve an efficient synthesis of calophyllum coumarin.;SOLUTION: A hydroxyketone compound represented by formula (I) [wherein, R1 is H or a hydrocarbon group which may have a substituent; R2 and R3 are each identically or independently a hydrocarbon group which may have a substituent; R4 is H or a hydrocarbon group and R5 is a hydrocarbon group, or R4 and R5 form a carbocycle which may have a hydrocarbon group or a substituent.] or a hydroxyketone compound having an activated hydroxy group undergoes, in the presence of optically active cinchona alkaloid, an intramolecular oxo-Michael reaction in a solvent having high permittivity to form a cis- or trans-form of a compound represented by formula (II) [wherein, R1, R2, R3, R4 and R5 are the same as before mentioned.] or a chromanone ring compounds thereof. The obtained compounds are then reduced.;COPYRIGHT: (C)2002,JPO
展开▼
机译:解决的问题:实现新颖,实用和有效的四环香豆素化合物的立体选择性不对称合成,预期其生理活性和其在药物开发中的用途,以及有效地合成Calophyllum香豆素。溶液:由式(I)表示的羟基酮化合物[其中,R 1为H或可具有取代基的烃基; R 2和R 3分别相同或独立地是可以具有取代基的烃基。 R 4为H或烃基,R 5为烃基,或R 4和R 5形成可具有烃基或取代基的碳环。]或具有活化羟基的羟基酮化合物在旋光金鸡纳的存在下进行。生物碱,在高介电常数的溶剂中进行分子内的氧-迈克尔反应,形成式(II)表示的化合物的顺式或反式[式中,R1,R2,R3,R4和R5与前述相同[]或其苯并二氢吡喃酮化合物。还原后得到的化合物。版权所有:(C)2002,日本特许厅
展开▼