Preparation of (L)(N,N'-ethylenebis(salicylideneaminato))-(1,3-butadien-2-yl)cobalt(III) complexes and their utilization in facile and regioselective Diels-Alder reactions

被引:13
作者
Chapman, JJ
Welker, ME
机构
[1] WAKE FOREST UNIV,DEPT CHEM,WINSTON SALEM,NC 27109
[2] LORILLARD RES CTR,GREENSBORO,NC 27420
关键词
D O I
10.1021/om960919k
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Dark green (N,N'-ethylenebis(salicylideneaminato)cobalt(I) (Co(salen)) anions underwent smooth S(N)2' reactions with allenic electrophiles in the presence of added ligands (L) to give (L)(salen)(1,3-butadien-2-yl)cobalt(III) complexes (L = pyr, DMAP, H2O). The cobalt dienyl complexes prepared were fully characterized and then treated with a range of dienophiles to give Diels-Alder cycloaddition adducts. The cobalt-carbon bonds in Diels-Alder adducts were cleaved by utilizing straightforward chemical reactions which allowed recovery of cobalt in a reusable form as well as demetalated cycloadduct.
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页码:747 / 755
页数:9
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