ISSN:
0009-2940
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Low Coordinated Phosphorus Compounds, 29 Diels-Alder Reactions of 2,3-Dimethylbutadiene with Stable Phosphaalkenes as DienophilesPhosphaalkenes 1a-h react with 2,3-dimethylbutadiene (2) to yield the 1,2,3,6-tetrahydrophosphinines 3a-h. 3a-g exist in two diastereomeric forms, which can be interconverted thermically under inversion at the phosphorus atom. This is proved by means of X-ray structure analysis of both isomers of the P-sulfide 4b. Dehydrochlorination of 3g gives the tricyclic compound 6, the structure of which is confirmed by X-ray structure analysis, too.
Notes:
Die Alkylidenphosphane 1a-h reagieren mit 2,3-Dimethylbutadien (2) zu den 1,2,3,6-Tetrahydrophosphininen 3a-h. Von 3a-g existieren jeweils zwei Diastereomere, die thermisch ineinander umgewandelt werden können. Ursache der Konfigurationsumkehrung ist eine Inversion am Phosphoratom, wie durch Röntgenstrukturanalyse der beiden Isomeren des P-Sulfids 4b nachgewiesen wird. Die Dehydrochlorierung von 3g führt zu dem durch eine Röntgenbeugungsanalyse gesicherten Tricyclus 6.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19851180239
