A 1,3,2-oxazaborolidine dimer derived from (S)-alpha,alpha-diphenylprolinol.
A 1,3,2-oxazaborolidine dimer derived from (S)-alpha,alpha-diphenylprolinol.
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衍生自 (S)-α,α-二苯基脯氨醇的 1,3,2-恶唑硼烷二聚体。
DOI:
10.1107/s0108270104000666
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发表时间:
2004
期刊:
影响因子:
--
通讯作者:
Baran,Peter
中科院分区:
文献类型:
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作者:
Ortiz-Marciales,Margarita;DeJesús,Melvin;González,Eduvigis;Raptis,RaphaelG;Baran,Peter
The reaction of (S)-α,α-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.