ISSN:
0009-2940
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Olefination Reactions with Phosphorous ylids, II. β-Oxido Phosphorus ylids in the Presence and Absence of Soluble Alkaline Metal Saltstrans-Stereoselective olefin synthesis by means of the modified Wittig reactions cannot be achieved in salt-free medium, since only in the presence of soluble lithium salts do the phosphorous betaines exist predominantly in the threo form.
Notes:
Phosphor-Betaine bevorzugen nur dann ganz eindeutig die threo-Form und können somit stereoselektiv in trans-Olefine übergeführt werden, wenn lösliche Lithiumsalze im Reaktions-gemisch zugegen sind.
Additional Material:
1 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19701030915
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