EFFECTS OF A STRONG ELECTRON-WITHDRAWING N-BORTYL SUBSTITUENT ON THE STABILITY OF NITRILIMINES - SURPRISING DIMERIZATION INVOLVING THE NITRILIMINE HETEROATOM SUBSTITUENTS WITH FORMATION OF (FUSED) BICYCLIC [3.3.0] AND [4.3.0] DERIVATIVES
N. Dubau et al., EFFECTS OF A STRONG ELECTRON-WITHDRAWING N-BORTYL SUBSTITUENT ON THE STABILITY OF NITRILIMINES - SURPRISING DIMERIZATION INVOLVING THE NITRILIMINE HETEROATOM SUBSTITUENTS WITH FORMATION OF (FUSED) BICYCLIC [3.3.0] AND [4.3.0] DERIVATIVES, Organometallics, 13(7), 1994, pp. 2913-2916
The lithium salts of [bis(diisopropylamino)-phosphino]diazomethane 1a
and s(diisopropylamino)thioxophosphoranyl]diazomethane 1b react with d
icyclohexylchloroborane giving transient N-boryl-nitrilimines 2a and 2
b, which dimerize affording (fused) heterobicyclic [3.3.0] and [4.3.0]
derivatives 4 and 6, respectively. Base induced hydrolysis of 6 leads
to 1,4-dihydro-1,2,4,5-tetrazine 9.