Asymmetric hydrolytic kinetic resolution with recyclable polymeric Co(<scp>iii</scp>)–salen complexes: a practical strategy in the preparation of (S)-metoprolol, (S)-toliprolol and (S)-alprenolol: computational rationale for enantioselectivity
作者:Tamal Roy、Sunirmal Barik、Manish Kumar、Rukhsana I. Kureshy、Bishwajit Ganguly、Noor-ul H. Khan、Sayed H. R. Abdi、Hari C. Bajaj
DOI:10.1039/c4cy00594e
日期:——
epoxide (up to 46% compared to 50% theoretical yield) along with high enantioselectivity (up to 99%) were obtained in most cases using catalyst 1. Further studies showed that catalyst 1 could retain its catalyticactivity for six cycles under the present reaction conditions without any significant loss in activity or enantioselectivity. To show the practical applicability of the above synthesized catalyst
Novel lapachone compounds and methods of use thereof
申请人:Ashwell Mark A.
公开号:US20090105166A1
公开(公告)日:2009-04-23
The present invention provides novel tricyclic spiro-oxathiine naphthoquinone derivatives, a synthetic method for making the derivatives, and the use of the derivatives to induce cell death and/or to inhibit proliferation of cancer or precancerous cells. The naphthoquinone derivatives of the present invention are related to the compound known as β-lapachone (3,4-dihydro-2,2-dimethyl-2H-naphtho(1,2-b)pyran-5,6-dione).
ortho‐substituted phenyl glycidyl ethers and para‐nitrostyrene oxide. Worthy of note is that the substrate structure remarkably affected the enantioselectivities of the enzyme, as a reversed (S)‐enantiopreference was unexpectedly observed for the ortho‐nitrophenyl glycidyl ether. As a proof‐of‐concept, five enantiopure epoxides (>99% ee) were obtained in high yields, and a gram‐scale preparation of
Asymmetric Hydrolytic and Aminolytic Kinetic Resolution of Racemic Epoxides using Recyclable Macrocyclic Chiral Cobalt(III) Salen Complexes
作者:Rajkumar Tak、Manish Kumar、Tusharkumar Menapara、Naveen Gupta、Rukhsana I. Kureshy、Noor-ul H. Khan、E. Suresh
DOI:10.1002/adsc.201700788
日期:2017.11.23
New chiral macrocyclic cobalt(III) salen complexes were synthesized and used as catalyst for the asymmetric kinetic resolution (AKR) of terminalepoxides and glycidyl ethers with aromatic/aliphatic amines and water as nucleophiles. This is the first occasion where a Co(III) salen complex demonstrated its ability to catalyze AKR as well as hydrolytic kinetic resolution (HKR) reactions. Excellent enantiomeric
Use of 5HT-1F receptor antagonists for treating anxiety disorders
申请人:ELI LILLY AND COMPANY
公开号:EP0976747A3
公开(公告)日:2000-09-13
The present invention provides a method for the treatment of prevention of anxiety disorders which comprises administering to a mammal in need of such treatment a serotonin 5-HT1F receptor antagonist.