Kyri, Andreas Wolfgang: Investigations on 1,2-oxaphosphetane complexes. - Bonn, 2017. - Dissertation, Rheinische Friedrich-Wilhelms-Universität Bonn.
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author = {{Andreas Wolfgang Kyri}},
title = {Investigations on 1,2-oxaphosphetane complexes},
school = {Rheinische Friedrich-Wilhelms-Universität Bonn},
year = 2017,
month = nov,

note = {In this thesis, first derivatives of previously unknown 1,2-oxaphosphetane complexes were synthesized, either by reaction of Li/Cl phosphinidenoid complexes with epoxides or by formal insertion into the OH bond of 2-iodoethanol and subsequent ring closing reaction, also based on Li/Cl phosphinidenoid complex chemistry. A variety of derivatives were synthesized and characterized using, e.g., multinuclear NMR or single crystal X-ray diffraction studies. Besides studies on functional group tolerance in oxaphosphetane complex synthesis, the formation of isomers was investigated in great detail; for the latter, the substitution pattern was changed systematically.
In addition, syntheses of a bis-oxaphosphetane complex and the first 1,2-thiaphosphetane complex, via reaction of a Li/Cl phosphinidenoid complex with a thiirane, was achieved.
First investigations on the reactivity of 1,2-oxaphosphetane complexes showed promising results in the following areas: ring opening reaction using Lewis-acids or Brønsted-acids, ring expansion and hydrolysis reactions.
Further investigations revealed the usability of Li/Cl phosphinidenoid complexes for the formal insertion into N-H bonds of primary and secondary amines. Another research line focused on the synthesis of a phosphinito complex and a 1,2-oxaphospholane complex, using the methodology described previously for 2-iodoethanol.},

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