ISSN:
1042-7163
Keywords:
Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The symmetrical and unsymmetrical 1,3-diphospha-propenes 3 and 4 were obtained from the corresponding diposphiranes 1 and 2. The chemical behavior of these compounds has been studied. Phosphonium-phosphaalkenes 7a and 10a have been obtained in the reactions with aluminium trichloride. Whereas the symmetrical diphosphaallene 13 can be obtained by reaction of 1 or 3 with lithio compounds, the unsymmetrical diphosphaalene 14 cannot be prepared by a similar route. Reduction of 3a and 4a (obtained with a different conformation) by lithium aluminum hydride afforded phosphino-phosphaalkenes 17a and 18a (with a similar conformation); further dehydrochlorination with amines led to the symmetrical and unsymmetrical diphosphaalenes 13 and 14, respectively. The formation of allenes strongly depends on the conformation of the starting diphosphapropenes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/hc.520020204
