摘要:
The present invention relates to a chiral spiro-pyridylamidophosphine ligand compound, synthesis method therefor and application thereof. The chiral spiro-pyridylamidophosphine compound is a compound having a structure of Formula (I), a racemate or optical isomer thereof, or a catalytically acceptable salt thereof, and is mainly characterized by having a chiral spiro-dihydro-indene skeleton in its structure. The chiral spiro-pyridylamidophosphine compound may be synthesized with optical active 7-diaryl/alkylphosphino-7'-amino-1,1'-spiro-dihydro-indene or substituted 7-diaryl/alkylphosphino-7'-amino-1,1'-spiro-dihydro-indene having a spiro-skeleton as chiral starting material. The chiral spiro-pyridylamidophosphine compound may be used as a chiral ligand in asymmetric hydrogenation of a carbonyl compound catalyzed by iridium, in which the reaction activity is very high, the amount of the catalyst may be 0.0001 mol%, and the enantioselectivity of the reaction is up to 99.9%ee.
摘要:
An organic compound capable of forming a hydrogen molecular compound such as a hydrogen clathrate is brought in contact with hydrogen gas in a pressurized state. It enables relatively light-weight and stable storage of hydrogen at or near the ordinary temperature and the ambient pressure and easy takeoff of the stored hydrogen.
摘要:
The invention concerns novel bi-aromatic compounds, analogues of Vitamin D. The invention also concerns a method for preparing same, and the use thereof in pharmaceutical compositions for use in human or veterinary medicine (in dermatology, cancerology, and in the field of autoimmune diseases and that of organ or tissue transplant in particular), further still in cosmetic compositions.
摘要:
The invention concerns novel bi-aromatic compounds of general formula (I) and the method for preparing them, and their use in pharmaceutical compositions for use in human or veterinary medicine (in dermatology, in cancerology, and in the field of autoimmune diseases and that of organ or tissue transplants in particular), or further still in cosmetic compositions.
摘要:
Disclosed herein are a novel optically active naphthalene derivative, a process of the preparation thereof a ferroelectric liquid crystal composition containing the same and a liquid crystal element using the composition. The above optically active naphthalene derivatives including optically active naphthylcarboxylic acid derivative, hydroxynaphthalene derivative, alkoxynaphthylalkanol derivative and alkylnaphthylalkanol derivative have the following structural formula: wherein R' denotes an alkyl group of 3-20 carbon atoms, R 2 denotes an alkyl group of 1-20 carbon atoms optionally substituted with halogen atom(s) or an alkoxyalkyl group of 2-20 carbon atoms optionally substituted with halogen atom(s), X denotes -COO- or -OCO-, k, t and m denotes 0 or 1 respectively, n denotes an integer of 0-6, p denotes 0 or 1, and an asterisk indicates an asymmetric carbon atom, proviso when k is 0, t and m are not 1 at the same time, when k is 1, m is 1, and when n is 0 and m is 1, X is -COO-. These optically active naphthalene derivatives are useful as a ferroelectric liquid crystal material or its component having a sufficient spontaneous polarization and by which a high speed response is possible and which further exhibits a ferroelectric liquid crystal phase in a temperature region around room temperature.
摘要:
The invention provides novel compounds of the formula: and wherein m is 1 or 2, R 6 and R 7 , which can be the same or different are H or an alkyl group of 1 to 4 carbon atoms, or wherein n is 0 to 4, R 1 and R 2 , which can be the same or different are H, OH, alkoxy of 1 to 4 carbon atoms, benzyloxy or methoxymethoxy; R 3 is H, OH, halogen, alkoxy of 1 to 4 carbon atoms, benzyloxy, methoxymethoxy, 2,3-dihydroxypropoxy or can form an N-containing three-, four-, five- or six-membered heterocyclic ring; R 4 is OH, F, Cl, Br, I, mesyloxy, tosyloxy, formyloxy, alkylcarbonyloxy of 1 to 4 carbon atoms or CH 2 R 4 is replaced by CHO; R 5 is H or OH; or R 4 and R 5 together form an -0- bridge between the carbon atoms to which they are attached, and their non-toxic pharmaceutically acceptable salts and esters and mixtures thereof. Processes for the preparation of these compounds are described, and also novel pharmaceutical compositions containing them. These compounds exhibit valuable pharmacological properties as estrogenic, anti-estrogenic, and progestanic agents. They are also effective against oestrogen-dependent tumours. Certain compounds are useful as chemical intermediates for the preparation of pharmacologically active compounds of the invention.
摘要:
Disclosed is a practical method for efficiently producing an alcohol compound by hydrogenating an aldehyde by using a homogeneous copper catalyst which is an easily-available low-cost metal species. Specifically disclosed is a method for producing an alcohol compound, which is characterized in that a hydrogenation reaction of an aldehyde compound is performed in the presence of a homogeneous copper catalyst and a diphosphine compound.