REDUCTION OF ALPHA,BETA-UNSATURATED KETONES AND ALDEHYDES BY TUNGSTEN-TUNGSTEN TRIPLE BONDS - FORMATION OF 1,2 AND 1,4 ADDUCTS AS OPPOSED TO C=O CLEAVAGE

被引:16
作者
CHISHOLM, MH [1 ]
LUCAS, EA [1 ]
SOUSA, AC [1 ]
HUFFMAN, JC [1 ]
FOLTING, K [1 ]
LOBKOVSKY, EB [1 ]
STREIB, WE [1 ]
机构
[1] INDIANA UNIV,CTR MOLEC STRUCT,BLOOMINGTON,IN 47405
关键词
D O I
10.1039/c39910000847
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Whereas reactions between sterically unencumbered aldehydes RCHO and [W2(OCH2Bu(t))6(py)2] (py = pyridine) yield mu-alkylidene oxo ditungsten compounds, similar reactions with the alpha,beta-unsaturated organic carbonyls CH2 = CHCH = O, MeCH = CHCH = O and CH2CHC(Me) = O give 2:1 adducts of three different structural types; the presence of the neighbouring C-C double bond allows chelate behaviour by ring-closure, thereby providing a kinetic diversion from the otherwise facile C = O bond cleavage.
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页码:847 / 849
页数:3
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