[4 + 2]-Cycloadditions of a thiazol-based tricyclic 1,4-diphosphinine and a new easy 1,4-diphosphinine protection deprotection strategy†,10.1039/D0DT02529A

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[4 + 2]-Cycloadditions of a thiazol-based tricyclic 1,4-diphosphinine and a new easy 1,4-diphosphinine protection deprotection strategy†

Imtiaz Begum,Tim Kalisch,Gregor Schnakenburg,Zsolt Kelemen,László Nyulászi,Rainer Streubel

Dalton Transactions Pub Date : 09/01/2020 00:00:00 , DOI:10.1039/D0DT02529A

Abstract

Diels–Alder-reactions of a thiazol-2-thione-based, tricyclic 1,4-di-phosphinine were investigated, showing that the central aromatic π-system can react with various dienophiles. The reaction with 4-phenyl-1,2,4-triazoline-3,5-dione was special as the product revealed a remarkable sensitivity towards light, thus enabling the photochemical deprotection of the tricyclic 1,4-diphosphinine.