Bulky derivatives of boranes, boronic acids and boronate estersvia reaction with diazomethanes†
Abstract
Reactions of the perfluoroarylboranes RB(C6F5)2 (R = C6F5, Ph, Cl, OC6F5) with Me3SiCH(N2), (C6F5)CH(N2) or Ph2C(N2) yield (C6F5)2B(Me3SiCH(C6F5)) 1, (C6F5)B(Me3SiCH(C6F5))22, (C6F5)B(Me3SiCH(C6F5))(Me3SiCH(C6H5)) 3, (C6F5)2B(CH(C6F5)2) 4, ClB(C6F5)(Ph2C(C6F5)) 5 and (C6F5O)B(C6F5)(Me3SiCH(C6F5)) 6 as a result of single or double insertion of a Me3SiCH, C6F5CH or Ph2C fragment into a B–C bond of the respective C)(OC2H5)(OB(C6F5)2) 8 and [(Me)(C6F5)(C
C)(OC2H5)]2(O2B(C6F5)) 9, in addition to the corresponding
C)(OC2H5)(OB(C6F5)2)(py) 10 and [(Me)(C6F5)(C
C)(OC2H5)]2(O2B(C6F5))(py) 11. Similarly, reaction of α-diazomethylacetate with BPh3 yielded analogous products of
C)(OC2H5)(OBPh2) 12 and was isolated as a mixture of E and Z-isomers whereas BPh3 reacts with Me3SiCH(N2) and
- This article is part of the themed collection: Boranes and borohydrides