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2-Dimethoxyphosphoryl-1,3-dithiane: A comparison of NMR studies for 1H, 13C and 31P nuclei by one- and two-dimensional NMR techniques

✍ Scribed by Michael Engelhardt; Gerhard Hägele; Marian Mikolajczyk; Piotr Balczewski; Detlef Wendisch

Publisher
John Wiley and Sons
Year
1985
Tongue
English
Weight
403 KB
Volume
23
Category
Article
ISSN
0749-1581

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✦ Synopsis

2-Dimethoxyphosphoryl-l,3-dithiane was obtained by the reaction of 2-ddoro-1,3&thia~~e with trimethyl phosphite. Studies at 200,360 and 400 MHz using 'H, 13C and " P nuclei and lDand 2D NMR techniques are described. Long-range coupling constants were extracted by iterative treatment of [ A B ] , C D m spin systems. A rigid dithiane structure with axial phosphorus is consistent with the NMR results. Analogous dithianes and solid-state structures are discussed. 'H NMR STUDIES An appropriate description of the -CH,-CH,--CH,-unit in 1,3-dithianes such as 1-3 with a rigid Q W Scheme 1. Equatorial conformer of 1.

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