A facile and regiospecific tritiation of sphingosine: Synthesis of (2S,3R,4E)-2-amino-4-octadecene-1,3-diol-1-3H
โ Scribed by Tatsushi Toyokuni; Mohammad Nisar; Barbara Dean; Sen-Itiroh Hakomori
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- French
- Weight
- 349 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0022-2135
No coin nor oath required. For personal study only.
โฆ Synopsis
Abstract
An easy technique for introduction of tritium into the 1โposition of sphingosine was developed, employing regiospecific oxidation of the primary hydroxy group followed by reduction with NaB^3^H~4~. An improved preparation of N,Nโdimethylsphingosine and its quaternization are also described.
๐ SIMILAR VOLUMES
A new synthesis of a series of 3-amino-1H-quinazoline-2,4-diones is described. The 1H-quinazoline-2,4dione 10 was made starting with fluorobenzoic acid in three high yielding steps. The key step of this synthesis involved the generation of the dianion of urea 7 and the subsequent intramolecular nucl
## Abstract The reaction of thiocarbohydrazide with carboxylic acids at the melting temperature allows an improved preparation of the Sโsubstituted 4โaminoโ3โmercaptoโ1,2,4โtriazole heterocycles. The crude 4โaminoโ5โmercaptoโ1,2,4โtriazoles react easily with carboxylic acids or carboxylic acid chlo