What a turnover! An efficient chiraliridiumcatalyst that bears a tridentate spiro aminophosphine ligand catalyzes the asymmetric hydrogenation of ketones with excellent enantioselectivities (up to 99.9 % ee) and extremely high turnover numbers (TONs; as high as 4 550 000).
CHIRAL SPIRO PHOSPHORUS-NIROGEN-SULPHUR TRIDENTATE LIGAND, PREPARATION METHOD AND APPLICATION THEREOF
申请人:Zhejiang Jiuzhou Pharmaceutical Co., Ltd.
公开号:US20180141966A1
公开(公告)日:2018-05-24
The present invention relates to a chiral spiro phosphine-nitrogen-sulfur (P—N—S) tridentate ligand, preparation method and application thereof. The P—N—S tridentate ligand is a compound represented by Formula I or Formula II, their racemates, optical isomers, or catalytically acceptable salts thereof. The ligand has a primary structure skeleton characterized as a chiral spiro indan skeleton structure with a thio group. The chiral spiro phosphine-nitrogen-sulfur tridentate ligand can be synthesized by reacting racemic or optical active compound 7-diary/alkyl phosphine-7′-amino-1,1′-spiro-dihydro-indene compound having a spiro-dihydro-indene skeleton as the starting material. The chiral spiro P—N—S tridentate ligand being complex with transition metal salt can be used in an asymmetric catalytic hydrogenation reaction for catalyzing carbonyl compound. In particular, in asymmetric hydrogenation reaction process, being complex with iridium for catalyzing β-alkyl-β-keto ester can obtain a high catalytic activity (a catalyst amount of 0.0002% mol) and high enantioselectivity (up to 99.9% ee) result. So the present invention has a practical value for industrial and commercial production.
The highly efficient asymmetric hydrogenation of alpha-arylmethylene cycloalkanones catalyzed by Ir-complexes of chiral spiro aminophosphine ligands was developed, providing chiral exo-cyclic allylic alcohols at high yields with excellent enantioselectivities (up to 97% ee) and high turnover numbers (S/C up to 10,000). This new reaction provided an efficient method for the synthesis of the key intermediate
开发了由手性螺氨基膦配体的 Ir 配合物催化的 α-芳基亚甲基环烷酮的高效不对称氢化,以高产率提供手性外环烯丙醇,具有优异的对映选择性(高达 97% ee)和高转换数(S/ C 高达 10,000)。这一新反应为合成抗炎洛索洛芬活性形式的关键中间体提供了一种有效的方法。
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.