Enantioselective imine Michael reaction for the preparation of the (8′R,8a′S)-8,8a′-dimethyl-1′,3′,4′,7′,8′,8a′-hexahydrospiro[1,3-dioxolane-2,2′(6′H)naphthalen]-6′-one building block. A formal synthesis of (+)-valencenol
摘要:
The enantioselective Michael addition of a chiral imine of 4-protected 2-methylcyclohexane-1,4-dione to phenyl crotonate led after cyclization. to the corresponding bicyclic lactam. Reductive cleavage of the chiral moiety followed by saponification gave the corresponding keto-acid, which was cyclized to afford a lactone. Belleau-Fujimoto reaction of the lactone then led to the title building block (diastereoselectivity 96:4, e.e. > 98%) in 11% overall yield from the starting dione. (8R, 8aS)-(+)-8,8a-Dimethyl-3,4,6,7,8,8a-hexahydronaphthalen-2 (1H)-one was obtained after reduction of the carbonyl group, acetylation, and reductive cleavage-deprotection (52% overall yield), representing a formal synthesis of (+)-valencenol. (C) 2001 Elsevier Science Ltd. All rights reserved.
[EN] TETRAHYDRONAPHTHALENE DERIVATIVES USEFUL AS NRF2 ACTIVATORS<br/>[FR] DÉRIVÉS DE TÉTRAHYDRONAPHTALÈNE UTILES EN TANT QU'ACTIVATEURS DE NRF2
申请人:BIOGEN MA INC
公开号:WO2019104030A1
公开(公告)日:2019-05-31
Provided are compounds of Formula I, or pharmaceutically acceptable salts thereof, and methods for their use as Nrf2 activators and for their production.
提供的是I式化合物,或其药用可接受的盐,以及它们作为Nrf2激活剂的使用方法和生产方法。
A Convenient Synthesis of Chiral, Non-Racemic [4<i>a</i>S,8<i>a</i>R]-5,5,8a-Trimethyl Octahydro-2,2-(1,3-Dioxolane)-Naphthalene
作者:Beatriz S.M. Tenius、Evelyn K. Schroeder
DOI:10.1080/00397910008087164
日期:2000.4
Abstract (-)-(4aS,8aR)-5,5-8a-trimethyl-trans-decaline 1 was prepared in a stereoespecific synthesis of 4 steps and 38% yield. The key-step involves an asymmetric Robinson annulation via Michaeladdition of chiral imine.
Tetrahydronaphthalene derivatives useful as Nrf2 activators
申请人:BIOGEN MA INC.
公开号:US11465963B2
公开(公告)日:2022-10-11
Provided are compounds of Formula I, or pharmaceutically acceptable salts thereof, and methods for their use as Nrf2 activators and for their production.
本文提供了式 I 的化合物或其药学上可接受的盐类,以及将它们用作 Nrf2 激活剂和生产它们的方法。
Enantioselective synthesis of (2S4aS,8aR)-1,1,4a-trimethyldecahydronaphthalen-2-ol [(−)-TMD], (4aS,8aR)-5,5,8a-trimethyloctahydronaphthalen-2(1H)-one, and (−)-polywood®, through michael-type reaction of chiral imines
The title compounds 6, 15, and 17 have been synthesized in a straightforward way in good yields and high enantiomeric excesses by the chiral imines method, leading to building-blocks 2 and 10, followed by a few conventional steps. (C) 1997 Elsevier Science Ltd.
Pfau, Michel; Jabin, Ivan; Revial, Gilbert, Journal of the Chemical Society. Perkin transactions I, 1993, # 17, p. 1935 - 1936