β-Cyclomanganated 1,5-diphenylpenta-1,4-dien-3-ones and their reactions with alkynes: routes to η5-pyranyl and η5-oxocycloheptadienylMn(CO)3 complexes
作者:Warren Tully、Lyndsay Main、Brian K Nicholson
DOI:10.1016/s0022-328x(01)01062-2
日期:2001.8
[[1-phenyl-2-((E)-3-phenylprop-2-en-1-oyl-κO)]ethenyl-κC1]tetracarbonylmanganese derivatives (5). Coupling of 5 with alkynes in some cases gives [4-phenyl-2-(2-phenylethenyl)pyranyl-η5]tricarbonylmanganese complexes (6) analogous to those previously reported for β-manganated chalcones, but in other cases an alternative cyclisation pathway subsequent to insertion of alkyne into the CMn bond leads to [6-oxo-4
将1,5-二苯基-1,4-二-3-酮(4)与苄基五羰基锰环金属化以形成[[1-苯基-2-((E)-3-苯基丙-2-烯-1-酰基-κ] ø)]乙烯基-κ ç 1 ] tetracarbonylmanganese衍生物(5)。的联接5,在一些情况下,炔烃给出[4-苯基-2-(2-苯基乙烯基)吡喃基-η 5 ] tricarbonylmanganese复合物(6)类似于前面β-manganated查耳酮报道的那些,但在其他情况下可替换的环化途径将炔烃插入CMn键后,会生成[6-氧代-4,7-二苯基环庚-1,4-二烯基-1,2,3,4,5-η]三羰基锰配合物(7)。报道了一种这样的化合物,[6-氧代-2,4,7-三苯基环庚-1,4-二烯基-1,2,3,4,5-η]三羰基锰(7a)的X射线晶体结构测定,由1,5-二苯基戊-1,4-二烯-3-酮和苯乙炔衍生而来。发现7-苯基基团占据了内位,并且提出了