摘要:
A catalyst composition comprising a monoester, the compound represented by formula (I) as an internal electron donor, and optionally an additional internal electron donor selected from a group consisting of diesters and diethers, wherein: R1, R2, R3, R4, R5 and R6 are hydrogen, straight, branched and cyclic alkyl having at most 20 carbon atoms and aromatic substituted and unsubstituted hydrocarbyl having 6 to 20 carbon atoms, R7 is a straight, branched and cyclic alkyl having at most 20 carbon atoms and aromatic substituted and unsubstituted hydrocarbyl having 6 to 20 carbon atoms, and R8 is an aromatic substituted and unsubstituted hydrocarbyl having 6 to 20 carbon atoms. Also described is a process for preparing the polymerization catalyst composition, a polymerization catalyst system comprising the catalyst composition, a co-catalyst and optionally an external electron donor; and use of the catalyst system for polymerization of olefins.
摘要:
Disclosed herein are compounds of Formulae (I) and (II), methods of synthesizing compounds of Formulae (I) and (II), and methods of using compounds of Formulae (I) and (II) as an analgesic.
摘要:
The invention provides derivatives of DEA which have increased potency and hydrolysis resistance as compared to DEA, and compositions thereof, as well as methods of using these derivatives to promote neurogenesis, neurite growth and/or length, and/or promote synaptogenesis.
摘要:
The present invention relates to a novel process for the industrial manufacture of substituted 7-allyl-6-hydroxy-indanes of formula (I), wherein R is a straight or branched (C1-C6)alkyl group and X is a halogen and enantiomers thereof.
摘要:
The invention provides compounds of formula (I) wherein R1 represents hydrogen or alkyl; R2 represents an unsubstituted or substituted heterocycle or R2 represents an unsubstituted or substituted aryl; R3 represents alkyl or halogen; X represents a single bond or an alkandiyl-group, optionally interrupted by one ore more oxygen atoms or carbonyl groups or carbonyloxy groups in free base or acid addition salt form, processes for their preparation and their use as pharmaceuticals.
摘要:
Beschrieben wird ein neues Verfahren zur Herstellung optisch aktiver Aminoalkohole der Formeln oder Derivaten davon, das eine biotechnologische Racematspaltung des racemischen Aminoalkohols der Formel mittels einer Hydrolase in Gegenwart eines Acylierungsmittels umfasst.
摘要翻译:任选(1S,4R) - 或(1R,4S)-1-氨基-4-(羟甲基)-2-环戊烯(VII)或(VIII)(或其盐)的生产涉及生物技术光学拆分外消旋1-氨基 -4-(羟甲基)-2-环戊烯(I),在酰化剂存在下使用水解酶。 式(VII)或(VIII)的(1S,4R) - 或(1R,4S)-1-氨基-4-(羟甲基)-2-环戊烯(或其盐)的生产涉及生物技术光学拆分外消旋1- 在酰化剂X,Y = H或酰基存在下,使用水解酶(特别是脂肪酶),式(I)的氨基-4-(羟甲基)-2-环戊烯。 包括:(1)制备(VII; X,Y = H)或(VIII; X,Y = H)(或其盐),包括相应化合物的化学水解,其中X和Y中的至少一个 不是H; 和(2)通过(a)还原2-氮杂双环 - (2.2.1) - 庚-5-烯-2-酮的(VII; Y = H; X = COR)或(VII; Y = H; X = (II)(外消旋或旋光异构体形式)至外消旋(I); (b)在酰化剂存在下使用水解酶进行生物技术光学拆分(I),得到(VII; X,Y = H)或(VII; X,Y = H); 和(c)酰化得到(VII; Y = H; X = COR)或(VII; Y = H; X = COR)。 R:1-4C烷基,1-4C烷氧基,芳基或芳氧基。 [图片]。
摘要:
Beschrieben wird ein Verfahren zur Herstellung eines racemischen oder optisch aktiven 4-(Hydroxymethyl)-2-cyclopentenderivats der allgemeinen Formel worin R 1 C 1-4 -Alkyl, C 1-4 -Alkoxy, Aryl oder Aryloxy bedeutet. Bei diesem Verfahren wird ein Cyclopenten-4-carbonsäure der Formel in Form des Racemats oder eines seiner optisch aktiven Isomeren mit einem Carbonsäurehalogenid der allgemeinen Formel worin R 1 die genannte Bedeutung hat und X ein Halogenatom bedeutet, zu einem racemischen oder optisch aktiven Cyclopenten-4-carbonsäurederivat der allgemeinen Formel acyliert und dieses zum gewünschten Produkt gemäss Formel XIII reduziert.
摘要:
An adamantane derivative having a functional group such as nitro, amino, hydroxyl, carboxyl, hydroxymethyl or isocyanato is oxidized with oxygen in the presence of an imide compound of general formula (2) (such as N-hydroxyphthalimide) or both of this imide compound and a cocatalyst (such as a transition metal compound). This process can efficiently provide an adamantane derivative having a hydroxyl group in addition to the functional group such as nitro, amino, hydroxyl, carboxyl, hydroxymethyl or isocyanato; wherein R?1 and R2¿ each represent hydrogen, halogen, alkyl, aryl or cycloalkyl, or R?1 and R2¿ may be bonded together to form a double bond, or an aromatic or non-aromatic ring; Y represents O or OH; and n represents 1 to 3.