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Coupling of Alkynyl(2,4,6-tri-tert-butylphenyl)phosphanes with Cuprous Chloride

✍ Scribed by Märkl, Gottfried ;Hennig, Rüdiger

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
599 KB
Volume
1996
Category
Article
ISSN
0947-3440

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✦ Synopsis

Abstract

Coupling of alkynyl(2,4,6‐tri‐tert‐butylphenyl)phosphanes 2 with n‐butyllithium and cuprous chloride gives 3,4‐diphospha‐1,5‐hexadiynes 3 or cuprous chloride complexes 8 of 3,4‐bis(phosphinidene)cyclobutenes 5, depending on the bulkiness of the substituent at the triple bond. The exclusive formation of racemic 3,4‐diphospha‐1,5‐hexadiynes 3, which was proven by ^31^P‐ and ^13^C‐NMR spectroscopy, explains the stereoselective rearrangement to only symmetrical cyclobutenes 5.

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Reaction of (E)-bis(2,4,6-tri-tert-butyl
Reaction of (E)-bis(2,4,6-tri-tert-butylphenyl)diphosphene with tetrachloro-o-benzoquinone
✍ Matthias Freytag; Peter G. Jones; Reinhard Schmutzler; Masaaki Yoshifuji 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 221 KB

## Abstract The reactions of (__E__)‐bis(2,4,6‐tri‐tert‐butylphenyl)diphosphene with tetrachloro‐o‐benzoquinone gave two products of interest, a spirophosphorane and a 1,3,2‐dioxaphospholane, indicating cleavage of the P=P bond. The structures were determined by X‐ray crystallographic analyses. © 2