Total Synthesis of (±)-Scopolamine: Challenges of the Tropane Ring
作者:Pierre-Antoine Nocquet、Till Opatz
DOI:10.1002/ejoc.201501430
日期:2016.2
Scopolamine was synthesized using 6,7-dehydrotropine as a key intermediate. Rhodium-catalyzed [4 + 3] cycloaddition chemistry and a modified Robinson–Schopf reaction were each independently evaluated for their utility in constructing the tropane core. Both synthetic approaches gave comparable overall yields.
Enantioselective desymmetrisation of an epoxytropinone for peduncularine synthesis
作者:Ruth E. Shelton、Serdar Sezer、David M. Hodgson
DOI:10.1016/j.tet.2020.131701
日期:2020.12
A key 7-allyl-8-hydroxy-6-azabicyclo[3.2.1]octan-3-one intermediate in a synthesis of the alkaloidpeduncularine is obtained enantioenriched, by desymmetrisation of an achiral 6,7-epoxy-8-azabicyclo[3.2.1]octan-3-one (epoxytropinone). Chiral lithium amide-assisted enantioselective silyl enol ether formation then TMSOTf/allyltrimethylsilane/2,6-lutidine-induced rearrangement−allylation proceeded in
The first enantioselective, totalsynthesis of the naturally occurring, potent cancer MDR reversal agent pervilleine C is reported. Each enantiomer of the natural product has been prepared as well as the enantiomers of the corresponding 8-oxa-pervilleine C.
报道了天然存在的强效癌症 MDR 逆转剂 pervilleine C 的第一个对映选择性全合成。已制备天然产物的每种对映体以及相应的 8-oxa-pervilleine C 的对映体。
OXIME-SUBSTITUTED-QUINOXALINE-TYPE PIPERIDINE COMPOUNDS AND USES THEREOF
申请人:Shionogi & Co., Ltd.
公开号:US20140187544A1
公开(公告)日:2014-07-03
The present disclosure relates to Oxime-Substituted Quinoxaline-Type Piperidine Compounds, such as those of Formula (I):
and the pharmaceutically acceptable salts and solvates thereof, wherein R
1
, R
2
, R
3
, R
4
, R
20
, R
21
, Q, Y
1
, Z, A, B, and a are as defined herein; compositions comprising an effective amount of an Oxime-Substituted Quinoxaline-Type Piperidine Compound, and methods to treat or prevent a condition, such as pain, comprising administering to an animal in need thereof an effective amount of an Oxime-Substituted Quinoxaline-Type Piperidine Compound.
Three-Component 1,2-Carboamidation of Bridged Bicyclic Alkenes via Rh<sup>III</sup>-Catalyzed Addition of C–H Bonds and Amidating Reagents
作者:Daniel S. Brandes、Ana Sirvent、Brandon Q. Mercado、Jonathan A. Ellman
DOI:10.1021/acs.orglett.1c00851
日期:2021.4.2
aromatic and heteroaromatic C–Hbond substrates with tertiary and secondary amide, lactam, pyrazole, and triazole directing groups and a variety of bridged bicyclic alkenes, including norbornene, benzonorbornadiene, oxygen- and nitrogen-bridged analogs, and an unsaturated tropinone. A broad dioxazolone scope was also observed. The use of a chiral Cp-derived RhIII catalyst enables asymmetric synthesis of