Facile One-Step Access to Pyrrole-Based 1,4-Diphosphabarrelenes

Janina A Werra; Klaus Wurst; Pawel Löwe; Fabian Dielmann

doi:10.1002/cplu.202200458

Facile One-Step Access to Pyrrole-Based 1,4-Diphosphabarrelenes

Chempluschem. 2023 Mar;88(3):e202200458. doi: 10.1002/cplu.202200458.

Authors

Janina A Werra^{1

2}, Klaus Wurst¹, Pawel Löwe², Fabian Dielmann¹

Affiliations

¹ Institute of General, Inorganic and Theoretical Chemistry, Leopold-Franzens-Universität Innsbruck, Innrain 80-82, 6020, Innsbruck, Austria.
² Institute of Inorganic and Analytical Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 28/30, 48149, Münster, Germany.

PMID: 36727496
DOI: 10.1002/cplu.202200458

Abstract

1,4-Diphosphabarrelenes are bicyclic diphosphines relevant, for example, for the generation of polymetallic coordination compounds. However, current synthetic protocols either suffer from low yields or require multiple reaction steps. Herein, we report the one-step synthesis of pyrrole-based 1,4-diphosphabarrelenes that are obtained in very good yields from the reaction of 1,2,5-trimethylpyrrole with 1,2-bis(dichlorophosphino)ethane or 1,2-bis(dichlorophosphino)benzene. The new caged diphosphines are strong donor ligands and act as bridging ligand in nickel(0), rhodium(I), iridium(I) and copper(I) coordination compounds.

Keywords: caged phosphine; coordination polymer; diphosphine; ligand design; phosphabarrelene.

Grants and funding

DI 2054/1-1/DFG