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Trends in Organic Chemistry   Volumes    Volume 4  Issue 1
Abstract
The adducts of 2,5 - dihydro - 1H - phosphole 1-oxides with dichlorocarbene as versatile intermediates for P-heterocycles including ring expanded products
György Keglevich, László Töke
Pages: 245 - 260
Number of pages: 16
Trends in Organic Chemistry
Volume 4  Issue 1

Copyright © 1993 Research Trends. All rights reserved

ABSTRACT
 
This review summarizes our recent results on the synthesis of various 6-, 7- and 8-membered ring phosphorus heterocycles. The key intermediates are the 3-phosphabicyclo[3.1.0]hexane 3-oxides obtained from dihydro-1H-phosphole 1-oxides by dichlorocarbene addition. The opening of the dichlorocyclopropane ring in these intermediates may afford dihydro- or tetrahydrophosphinine oxides, while the Friedel-Crafts reaction of the adducts gives benzo-phosphabicyclooctenes. The dihydrophosphinine oxides were further utilized in the preparation of hexahydrophosphinine oxides, phosphinines, 1,4-dihydrophosphinine oxides, phosphepine oxides and phosphabicyclooctadienes.
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