Enthalogenierung von Aminodihalogenboranen durch Na/K‐Legierung in Gegenwart von Naphthalin, Bis(trimethylsilyl)butadiin und 2,5‐Dimethyl‐2,4‐hexadien

Dehalogenation of Aminodihalogenoboranes by Na/K Alloy in the Presence of Naphthalene, Bis(trimethylsilyl)butadiyne, and 2,5‐Dimethyl‐2,4‐hexadiene Reaction of naphthalene with Na/K alloy and [(2,6‐diisopropylphenyl)methylamino]difluoroborane ( 1 ) in 1,2‐dimethoxyethane yields the aminodimethoxyborane 2 , the bis(amino)‐borane 3 , the diborylethyne 4 , and the diboryl oxide 5 . By addition of a mixture of bis(trimethylsilyl)butadiyne or 2,5‐dimethyl‐2,4‐hexadiene with dichloro(diisopropylamino)borane to Na/K alloy in hexane the 2,4,5‐triborabicyclo‐[1.1.1]pentane 7 and the diboretane 8 , resp., are obtained. 1 H‐, 11 B‐, 13 C‐, 19 F‐, 29 Si‐NMR‐, IR, and MS data are given. For 2–4, 7 and 8 X‐ray structure analyses are performed.