scholarly journals New Insights into the Reactivity of 2-Halo-Glycals. Synthesis of Novel Iodinated Oand S-Glycosides

2020 ◽  
Author(s):  
Agustín Rojas ◽  
Leticia Lafuente ◽  
Virginia Vetere ◽  
Agustin Ponzinibbio
Keyword(s):  
Alternative Mechanism ◽  
Selective Synthesis ◽  
Conformation Analysis ◽  
Complete Structure ◽  
First Report ◽  
Ferrier Rearrangement ◽  
Sugar Derivatives

<p><i>This is the first report on the Ferrier rearrangement of 2-halo-glycals with S-nucleophiles. We present herein the selective synthesis of new 2-iodo-2,3-unsaturated O- and S-glycosides. We obtained in good yields and high anomeric selectivity </i><i>a</i><i>-glycosydes. As a particular behaviour, we also describe heteroaromatic thio sugar derivatives were the C3 addition was performed in an alternative mechanism. A complete structure and conformation analysis by NMR was also presented. </i></p>

scholarly journals New Insights into the Reactivity of 2-Halo-Glycals. Synthesis of Novel Iodinated Oand S-Glycosides

2020 ◽  
Author(s):  
Agustín Rojas ◽  
Leticia Lafuente ◽  
Virginia Vetere ◽  
Agustin Ponzinibbio
Keyword(s):  
Alternative Mechanism ◽  
Selective Synthesis ◽  
Conformation Analysis ◽  
Complete Structure ◽  
First Report ◽  
Ferrier Rearrangement ◽  
Sugar Derivatives

<p><i>This is the first report on the Ferrier rearrangement of 2-halo-glycals with S-nucleophiles. We present herein the selective synthesis of new 2-iodo-2,3-unsaturated O- and S-glycosides. We obtained in good yields and high anomeric selectivity </i><i>a</i><i>-glycosydes. As a particular behaviour, we also describe heteroaromatic thio sugar derivatives were the C3 addition was performed in an alternative mechanism. A complete structure and conformation analysis by NMR was also presented. </i></p>

A fossil Aspergillus from Eocene Dominican amber

1988 ◽  
Vol 62 (01) ◽  
pp. 141-143 ◽  
Author(s):  
Gerard M. Thomas ◽  
George O. Poinar
Keyword(s):  
Dominican Republic ◽  
Fossil Species ◽  
First Report ◽  
Dominican Amber ◽  
Eocene Amber

A sporulating Aspergillus is described from a piece of Eocene amber originating from the Dominican Republic. The Aspergillus most closely resembles a form of the white spored phase of Aspergillus janus Raper and Thom. This is the first report of a fossil species of Aspergillus.

1392: First Report of a New Transurethral Detaching Prostatectomy of the Prostate (TUDP)

2005 ◽  
Vol 173 (4S) ◽  
pp. 377-378
Author(s):  
Yasunori Hiraoka ◽  
Kazuhiko Yamada ◽  
Yuji Shimizu ◽  
Hiroyuki Abe
Keyword(s):  
First Report

Human Chorionic Gonadotropin and CA 15-3 Producing Adenocarcinoma

1998 ◽  
Vol 37 (08) ◽  
pp. 297-298 ◽  
Author(s):  
A. Özet ◽  
A. Arpaci ◽  
S. Kömiircü ◽  
G. Üçkaya
Keyword(s):  
Lung Adenocarcinoma ◽  
Chorionic Gonadotropin ◽  
Human Chorionic Gonadotropin ◽  
Carbohydrate Antigen ◽  
Beta Subunit ◽  
Cancer Antigen ◽  
First Report ◽  
Primary Lung Adenocarcinoma ◽  
Adenocarcinoma Of Lung

Summary50 years old man suffering from primary lung adenocarcinoma presented with high levels of both beta subunit human chorionic gonadotropin (βHCG) and cancer antigen 15-3 (CA 15-3) in the absence of elevated carcinoembrionic antigen (CEA), alfa fetoprotein (AFP) and carbohydrate antigen 19-9 (CA 19-9). Although βHCG or CA 15-3 high levels were reported in adenocarcinoma of lung, this is the first report of a patient with high levels of both markers.

Sign in / Sign up

Export Citation Format

Share Document