Abstract:
A ruthenium catalyst is provided to be synthesized simply at high yield, and to perform racemization or dynamic kinetic resolution of secondary alcohols at room temperature in atmosphere stably. A ruthenium complex compound is represented by the chemical formula 1. In the chemical formula 1, R1 and R2 are independently hydrogen or substituted or unsubstituted phenyl, C1-5 alkyl, C2-5 alkenyl or C2-5 alkynyl; R3 is - C (O) -R4 or -Si-R5; R4 is C1-10 alkyl, C3-10 aryl, C1-10 alkoxy or substituted or unsubstituted phenyl; R5 is C1-10 alkyl or C3-10 aryl; X is halogen; and Y and Z are independently hydrogen, carbonyl or phosphine.
Abstract:
A method for preparing a norbornene monomer composition is provided to obtain a high exo-isomer content by controlling reaction temperature, reaction time, molar ratio of reactants and addition of a solvent while not adding a catalyst. A method for preparing a norbornene monomer composition comprises a step of reacting cyclopentadiene, dicyclopentadiene or a mixture thereof, a compound represented by the formula of CH2=CH-(CH2)n-OC(O)R (wherein n is an integer of 0-10, and R is a C1-C20 alkyl group) at a reaction temperature of 230-330 deg.C for a reaction time of 5 minutes-24 hours to obtain an exo-isomer content of at least 50 mol%. The compound represented by the formula is used in a molar ratio of 1:1-1:10 based on the cyclopentadiene, dicyclopentadiene or a mixture thereof.
Abstract:
하기식 (I)에 의해 표시되는 1-아세톡시-3-(치환페닐)프로펜 화합물.
R 1 , R 2 = H원자 또는 C 1 ∼C 10 알킬기, R 3 , R 4 = C 1 ∼C 4 알킬기, m=0 또는 1∼4, n=1∼5, k=1 또는 2, R 1 및 R 2 는 프로펜기의 2-또는 3-위치에 위치하고 있는 탄소원자와 함께 환상기를 형성하고 있어도 좋다.
Abstract:
Compounds represented by the general formula (I) can be produced by reacting a benzene compound represented by the general formula (IV) or (V) with an alkenylidene diacetate represented by the general formula (VI) in the presence of a catalyst comprising (a) a boron halide, (b) a triflate of a group 11 element, (c) a halide of a group 12 element, and (d) at least one member selected from among triflates and halides of tin and elements of atomic numbers of 58 and 66 to 71: (I) (IV) (V) (VI) wherein R1 and R2 are each H or C1-10 alkyl; A is a substituted phenyl group corresponding to a compound of the general formula (IV) or (V); R 3 and R4 are each C1-4 alkyl; m is 0 or 1 to 4; n is 1 to 5; and k is 1 or 2.
Abstract:
PURPOSE: A new method using isomerization reaction in the presence of strong acid is proposed to obtain substantial industrial profits. The method somewhat contributes to the enhancement of the reaction activity, but should use additional compound thus cannot be simplified. CONSTITUTION: A producing method of the invention is performed in the presence of catalyst system including methyl formate, water, solvent and 1 or more halogenation accelerator and 1 or more Ir compound. The method maintains the partial pressure of CO somewhat constantly during the reaction and maintains the amount of polyformate less than 20wt% of reacting medium.
Abstract:
본 발명에서는, 텔로머화 반응으로부터 수득된 반응 혼합물로부터 금속 착물 촉매를 분리하는 방법이 개시된다. 상기 방법에 따르면, 금속 착물 촉매가 금속 착물 촉매에 대해서보다 텔로머화 생성물에 대해 더 투과성인 하나 이상의 멤브레인 상에서 분리된다. 텔로머화, 금속 착물 촉매, 멤브레인