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
Total Synthesis of a 28-Member Stereoisomer Library of Murisolins
作者:Dennis P. Curran、Qisheng Zhang、Cyrille Richard、Hejun Lu、Venugopal Gudipati、Craig S. Wilcox
DOI:10.1021/ja061801q
日期:2006.7.1
library, fluorous PMB (p-methoxybenzyl) groups encode configurations, and fourmixtures of four dihydroxy-tetrahydrofurans are prepared by Shi epoxidation followed (optionally) by Mitsunobu reaction. The mixtures are coupled by Kocienski-Julia reaction with a single hydroxybutenolide followed by hydrogenation. Demixing and detagging provide the 16 pure stereoisomers. In the second synthesis, a single
Greensporone C, a new 14-membered resorcylic acid lactone, has been synthesized from inexpensive and commercially available starting materials. This convergent synthesis utilizes Cross metathesis using the Grubbs Hoveyda catalyst, alkylation of 1,3-dithiane and Yamaguchi macrolactonization as key steps.
Novel Carboxylic Acid and Antidepressant Composition Containing the Same as Active Ingredient
申请人:Yoshimura Hiroyuki
公开号:US20100184860A1
公开(公告)日:2010-07-22
The present invention provides a novel compound and antidepressant composition that can be effectively used for improving depressed mood and depressed state, particularly for depressed mood and depressed state in menopausal women. The compound of the present invention is represented by the following formula (1):
wherein R
1
and R
2
are identical or different and represent a hydrogen atom, a hydroxyl group or an acetyloxy group, and n is an integer of 2 to 7,
or a pharmaceutically acceptable salt or ester thereof. This compound is used as an active ingredient in the antidepressant composition. Examples of the compound of the invention include (2E)-9,10-dihydroxy-2-decenoic acid, (2Z)-9,10-dihydroxy-2-decenoic acid, (2E)-9-hydroxy-2-decenoic acid, and (2E)-7-acetoxy-2-heptenoic acid.