BIDENTATE PHOSPHINES OF HETEROARENES - 9,0-DIMETHYL-4,5-BIS(DIPHENYLPHOSPHINO)XANTHENE

被引：99

作者：

HILLEBRAND, S ^{[1
]}

BRUCKMANN, J ^{[1
]}

KRUGER, C ^{[1
]}

HAENEL, MW ^{[1
]}

机构：

[1] MAX PLANCK INST KOHLENFORSCH,D-45470 MULHEIM,GERMANY

来源：

TETRAHEDRON LETTERS | 1995年 / 36卷 / 01期

关键词：

D O I：

10.1016/0040-4039(94)02206-Q

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Twofold lithiation of 9,9-dimethylxanthene with n-butyllithium and N,N,N',N'-tetrametylethylenediamine (TMEDA) in boiling n-heptane followed by reaction with chlorodiphenylphosphine (Ph(2)PCl) yielded the title compound 4. The phosphine ligand was characterised by H-1 NMR, C-13 NMR, P-31 NMR spectroscopy and single crystal X-ray structure analysis. The folded and deformed xanthene unit causes a remarkably short P...O distance of 4.1 Angstrom which in turn results in a large coupling (6)J(pp) = 27.3 Hz.

引用

页码：75 / 78

页数：4

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