摘要:
The subject of the present invention are novel, chiral non-racemic ruthenium complexes defined by the general Formula 1, The present invention also relates to methods of manufacturing of a novel, chiral non-racemic ruthenium complexes defined by the general Formula 1 as well as their use in asymmetric olefin metathesis reactions.
摘要:
The present invention relates to a method for manufacturing an ester from a ketone or an aldehyde, which is a reactive substrate, by a Baeyer-Villiger oxidation reaction using hydrogen peroxide, and in this method, as a catalyst, M(BAr 4 ) n , which is a metal borate, is used (M represents an alkali metal or an alkaline earth metal; Ar represents an aryl; and n is the same number as the valence of M). For example, when cyclohexanone was used as the reactive substrate, and Sr[B(3,5-CF 3 C 6 H 3 ) 4 ] 2 was used as the catalyst, ε-caprolactone was obtained at an isolated yield of 82%.
摘要翻译:本发明涉及通过使用过氧化氢的Baeyer-Villiger氧化反应从作为反应性底物的酮或醛制造酯的方法,在该方法中,作为催化剂M(BAr 4)n (M表示碱金属或碱土金属; Ar表示芳基; n表示与M的化合价相同的数)。 例如,使用环己酮作为反应性底物,使用Sr [B(3,5-CF 3 C 6 H 3)4] 2作为催化剂时,以82%的分离收率得到μ-己内酯。
摘要:
The present invention relates to an improved process for the production of prostaglandins and prostaglandin analogs. In particular, this invention relates to the production of prostaglandins of the PGF 2α -series, including latanoprost, travoprost, and bimatoprost, which are active pharmaceutical ingredients used for the reduction of elevated intraocular pressure in patients with glaucoma and ocular hypertension.
wherein R 1 , R 2 , R 3 , and R 4 are, independently, a hydrogen atom or an optionally substituted linear or branched C 1 -C 6 alkyl or C 2 -C 6 alkenyl group, provided that when each of R 1 , R 2 , and R 3 are a hydrogen atom, R 4 is not a phenyl substituted linear or branched C 1 -C 6 alkyl or C 2 -C 6 alkenyl group; and with the proviso that the compound of formula (I) is neither 6,6,6a-trimethyl-hexahydro-cyclopenta[b]furan, 6,6,6a-trimethyl-2-ethyl-hexahydro-cyclopenta[b]furan, nor 6,6,6a-trimethyl-2-propyl-hexahydro-cyclopenta[b]furan and use thereof in a fragrant and/or flavouring composition.
摘要:
A process for the preparation of prostaglandin compounds having the formula (I); wherein A is selected from the group consisting Of C1-C6 alkyl; C7-C16 aralkyl wherein the aryl group is optionally substituted with one to three substituents selected from the group consisting Of C1 -C6 alkyl, halo and CF3; and (CH2)nOR' wherein n is from 1 to 3 and R' represents a C6-Cl0 aryl group which is optionally substituted with one to three substituents selected from the group consisting Of C1-C6 alkyl, halo and CF3; B is selected from OR' and NHR' wherein R' is C1-C6 alkyl; and formula (a) represents a double bond or a single bond, is disclosed. Novel intermediates are also disclosed.
摘要:
Disclosed is a method for preparing a prostaglandin derivative of formula (A): which comprises reacting an aldehyde represented by formula (1): with a 2-oxoalkyl phosphonate in a reaction solvent under the presence of alkali hydroxide as sole base. By carrying out the reaction using an alkali hydroxide as sole base in the reaction system, the desired prostaglandin derivative can be obtained by simple procedures and with high yield.