Fig. 4: Synthesis and characterization of 7a-7m.
From: Fluorescent pyridine phosphonium salts via transmutation of metallabenzenes
A Synthesis of compounds 7a-7m in two steps with isolation of the intermediate 6a-6j (dark blue) or one pot without the isolation of 6a-6j (black). B Selected X-ray structures for the cations of compounds 6 and 7 (thermal ellipsoils drawn with 50% probability level, the phenyl groups in PPh3 groups are shown as wireframe model for clarity) and the selected bond lengths (Å). C Isolation of intermediate 8a and 9a, and the conversion to 7a by stepwise heating up.
