A 1,3,2-oxazaborolidine dimer derived from (S)-alpha,alpha-diphenylprolinol.
作者信息
Ortiz-Marciales Margarita, De Jesús Melvin, González Eduvigis, Raptis Raphael G, Baran Peter
机构信息
Department of Chemistry, University of Puerto Rico, Humacao CUH Station, Humacao, PR 00791, USA.
出版信息
Acta Crystallogr C. 2004 Mar;60(Pt 3):o173-5. doi: 10.1107/S0108270104000666. Epub 2004 Feb 10.
Abstract
The reaction of (S)-alpha,alpha-diphenylprolinol with an excess of borane-tetrahydrofuran complex yields a stable crystalline material with the composition C34H38B2N2O2, which features a borane adduct of a spirocyclic structure with two oxazaborolidine rings joined by a central tetrahedral B atom. This dimeric oxazaborolidine complex, viz. 3,3,3',3'-tetraphenyl-1,1'-spirobi(3a,4,5,6-tetrahydro-3H-pyrrolo[1,2-c][1,3,2]oxazaborole)-7-borane, is the dominant product under various reaction conditions; its crystal structure is consistent with 11B, 1H and 13C NMR and IR analyses.
摘要
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