One-Step Stereospecific Strategy for the Construction of the Core Structure of the 5,11-Methanomorphanthridine Alkaloids in Racemic as well as in Optically Pure Form: Synthesis of (±)-Pancracine and (±)-Brunsvigine

2011 ◽  
Vol 2011 (24) ◽  
pp. 4571-4587 ◽  
Author(s):  
Ganesh Pandey ◽  
Ravindra Kumar ◽  
Prabal Banerjee ◽  
Vedavati G. Puranik
Keyword(s):  
Core Structure ◽  
Pure Form ◽  
The Core ◽  
One Step ◽  
Optically Pure

Stereoselective construction of 5,11-methanomorphanthridine and 5,10b-phenanthridine structural frameworks: Total syntheses of (±)-pancracine, (±)-brunsvigine, (±)-maritidine, and (±)-crinine

2012 ◽  
Vol 84 (7) ◽  
pp. 1597-1619 ◽  
Author(s):  
Ganesh Pandey ◽  
Smita R. Gadre
Keyword(s):  
Total Synthesis ◽  
Core Structure ◽  
Biologically Active ◽  
Single Electron ◽  
Azomethine Ylide ◽  
Dipolar Cycloaddition ◽  
Total Syntheses ◽  
The Core ◽  
One Step

The core structure of the complex pentacyclic 5,11-methanomorphanthridine skeleton and the vicinal quaternary and tertiary stereocenters of the 5,10b-phenanthridine skeleton are constructed stereospecifically in one step employing intramolecular 1,3-dipolar cycloaddition of a nonstabilized azomethine ylide (AMY) generated by the sequential double desilylation of appropriate bis-trimethylsilylmethyl amines using Ag(I)F as a single-electron oxidant. The strategy is successfully applied for the total synthesis of biologically active alkaloids such as (±)-pancracine, (±)-brunsvigine, (±)-maritidine, and (±)-crinine.

Indexicality of Grammar: The Case of Japanese Transgender Speakers

2019 ◽  
Author(s):  
Hideko Abe
Keyword(s):  
Gender Identity ◽  
Gender Identity Disorder ◽  
Grammatical Gender ◽  
Core Structure ◽  
Subject Positions ◽  
Transgender Identity ◽  
The Core ◽  
History Of ◽  
History Of Scholarship ◽  
Grammatical Structures

This article discusses how the intersection of grammatical gender and social gender, entwined in the core structure of language, can be analyzed to understand the dynamic status of selfhood. After reviewing a history of scholarship that demonstrates this claim, the discussion analyzes the language practices of transgender individuals in Japan, where transgender identity is currently understood in terms of sei-dōitsusei-shōgai (gender identity disorder). Based on fieldwork conducted between 2011 and 2017, the analysis reveals how individuals identifying with sei-dōitsusei-shōgai negotiate subject positions by manipulating the specific indexical meanings attached to grammatical structures.

Solvent-free and efficient synthesis of bicyclic 2-pyridone derivatives for endoplasmic reticulum imaging

2021 ◽  
Author(s):  
Xiaoyun Ran ◽  
Qian Zhou ◽  
Jin Zhang ◽  
Shanqiang Wang ◽  
Gui Wang ◽  
...  
Keyword(s):  
Endoplasmic Reticulum ◽  
Citric Acid ◽  
Core Structure ◽  
Solvent Free ◽  
Efficient Synthesis ◽  
The Core ◽  
Catalyst Free ◽  
Synthesis Approach ◽  
Ethylenediamine Derivatives

Started from citric acid (CA) and ethylenediamine derivatives, a solvent-free, catalyst-free and highly yield synthesis approach for bicyclic 2-pyridones was presented. Continuing to modify the core structure, a series of...

scholarly journals The Core Structure and Immunological Activities of Glycyrrhizan UA, the Main Polysaccharide from the Root of Glycyrrhiza uralensis.

1992 ◽  
Vol 40 (8) ◽  
pp. 2125-2128 ◽  
Author(s):  
Noriko SHIMIZU ◽  
Masashi TOMODA ◽  
Katsutoshi TAKADA ◽  
Ryoko GONDA
Keyword(s):  
Core Structure ◽  
Glycyrrhiza Uralensis ◽  
The Core

scholarly journals Lead cleavage sites in the core structure of group I intron-RNA

1993 ◽  
Vol 21 (2) ◽  
pp. 311-317 ◽  
Author(s):  
Barbara Striecjer ◽  
Uwe von Ahsen ◽  
Renée Schroeder
Keyword(s):  
Group I Intron ◽  
Core Structure ◽  
Cleavage Sites ◽  
The Core ◽  
Group I

scholarly journals Evaluation of Aberration-corrected Optical Sectioning for Exploring the Core Structure of ½[111] Screw Dislocations in BCC Metals

2017 ◽  
Vol 23 (S1) ◽  
pp. 432-433
Author(s):  
D. Hernandez-Maldonado ◽  
R. Groger ◽  
Q. M. Ramasse ◽  
P. B. Hirsch ◽  
P.D. Nellist
Keyword(s):  
Core Structure ◽  
Optical Sectioning ◽  
Screw Dislocations ◽  
The Core ◽  
Bcc Metals ◽  
Aberration Corrected

A Biomimetic Approach to the Synthesis of the Core Structure of the Marine Sponge Terpene Halichonadin G

2013 ◽  
Vol 2013 (31) ◽  
pp. 7041-7043 ◽  
Author(s):  
Kenta Saito ◽  
Ayumu Nishimori ◽  
Rika Mimura ◽  
Keiji Nakano ◽  
Hiyoshizo Kotsuki ◽  
...  
Keyword(s):  
Marine Sponge ◽  
Core Structure ◽  
The Core ◽  
Biomimetic Approach
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