Contribution to the chemistry of boron .235. Reactions of prolinol with borane-tetrahydrofuran: Anomalous dimerization of a 1,3,2-oxazaborolidine

被引：15

作者：

Lang, A ^{[1
]}

Noth, H ^{[1
]}

Schmidt, M ^{[1
]}

机构：

[1] UNIV MUNICH,INST INORGAN CHEM,D-80331 MUNICH,GERMANY

来源：

CHEMISCHE BERICHTE-RECUEIL | 1997年 / 130卷 / 02期

关键词：

(2-pyrrolidinylmethoxo)borane; anomalous dimer; 5-phenyl-3,4-dimethyl-1,3,2-oxazaborolidine, anomalous dimer; reaction intermediates; boron compounds;

D O I：

10.1002/cber.19971300217

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The reaction of (S)-prolinol (LH) with H3B . THF proceeds via [L(2)BH(2)]BH4, which decomposes with elimination of hydrogen at ca. -40 degrees C to give the BH3 adduct of spirocyclic 7. On heating, 7 loses more H-2 to give the ''anomalous'' dimerization product 11, which features a tetracoordinated B atom in a ''tetrahedral'' BN2O2 unit and another B atom in an N2BH2 environment. It is also shown that the product resulting from the reaction of pseudoephedrin with H3B . THF undergoes an analogous anomalous dimerization, affording product 8.

引用

页码：241 / 246

页数：6

共 26 条

[1] BORON-NITRON COMPOUNDS .86. SOME NEW ORGANOBORON-NITROGEN HETEROCYCLES [J].