Reductive Rearrangement of a 1‐Phospha‐2‐azanorbornene
2021
The reduction of the 1-phospha-2-azanorbornene derivate endo - 1 with lithium aluminium hydride leads to an unprecedented 1-phosphabicyclo[3.2.1]octa-2,5-diene, while a phospholide anion is formed with lithium. The latter can be protonated resulting in formation of an unusual 2 H -phosphole dimer. Furthermore, 3 H -phospholes, previously assumed to have no synthetic relevance as intermediates, were proposed to act as dienophile in the dimerisation of 3,4-dimethyl-1-phenylphosphole at elevated temperatures based on theoretical calculations.
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