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Facile Access to Unprecedented Electron‐Precise Monohydrodiboranes(4), cis ‐1,2‐Dihydrodiboranes(4), and a 1,1‐Dihydrodiborane(5)
Author(s) -
Arrowsmith Merle,
Braunschweig Holger,
Radacki Krzysztof,
Thiess Torsten,
Turkin Arthur
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201605270
Subject(s) - adduct , phosphine , chemistry , hydride , irradiation , ring (chemistry) , medicinal chemistry , stereochemistry , organic chemistry , physics , catalysis , nuclear physics , hydrogen
2,3‐Bis(dimethylamino)‐substituted B 2 N 2 C 2 heterocycles underwent selective dimethylamino/hydride exchange with either one or two equivalents of BH 3 ⋅ SMe 2 to give the corresponding cyclic monohydrido‐ or ( cis )1,2‐dihydridodiboranes(4), respectively. Upon either heating or irradiation in solution, the latter underwent ring contraction to the corresponding five‐membered BN 2 C 2 heterocycles, whereas irradiation of the 1,2‐dimethylaminoethene‐supported 1,2‐dihydridodiborane(4) in the presence of PEt 3 gave an unprecedented unsymmetrical 1,1‐dihydrodiborane(5) phosphine adduct.