Diphospha-Ureas from the Phosphaketene Ph 3 GePCO.

Authors :: Szkop KM
Jupp AR
Razumkov H
Xu M
Stephan DW
Source :: Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2019 Aug 01; Vol. 25 (43), pp. 10084-10087. Date of Electronic Publication: 2019 Jul 08.
Publication Year :: 2019
Abstract: The phosphaketene Ph <subscript>3</subscript> GePCO is shown to react with the phosphide KP(tBu) <subscript>2</subscript> to generate the anion [Ph <subscript>3</subscript> GePC(O)P(tBu) <subscript>2</subscript> ] <superscript>-</superscript> 1. This species reacts with CH <subscript>3</subscript> I or ClGePh <subscript>3</subscript> to give the dissymmetric diphospha-ureas (tBu) <subscript>2</subscript> PC(O)P(GePh <subscript>3</subscript> )(CH <subscript>3</subscript> ) 2 and (Ph <subscript>3</subscript> Ge) <subscript>2</subscript> PC(O)P(tBu) <subscript>2</subscript> 3 respectively. Sequential treatment of 2 with a base and CH <subscript>3</subscript> I affords a route to (tBu) <subscript>2</subscript> PC(O)P(CH <subscript>3</subscript> ) <subscript>2</subscript> 5. These species are products of the first modular diphospha-urea synthesis. The subsequent thermal and photochemical reactivity of these species was also probed and described.<br /> (© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)