Organic Syntheses via Transition Metal Complexes. 116.<sup>1</sup> Carbocyclic Four-, Five-, and Six-Membered Rings by Condensation of (Alkyl,ethoxy)carbene Complexes (M = W, Cr) with α,β-Unsaturated Tertiary Acid Amides
(cyclohexan-4-on-1-yl)carbene tungsten complexes 6 were obtained by condensation of (ethoxy,methyl)carbene tungsten complex (OC)5WC(OEt)CH3 1a with α,β-unsaturated tertiary acid amides PhCHCHC(O)NR2 7 in the presence of POCl3/Et3N and (COCl)2/Et3N, respectively. Compounds 2 underwent a π-cyclization to zwitterionic η1-cyclopentadiene complexes 3. Condensation of (prim-alkyl,ethoxy)carbenecomplexes (CO)5MC(OEt)CH2R1
4-氨基-1-钨-1,3,5-己三烯(CO)5 W C(OEt)CH C(NR 2)CH CHPh(3 E)-2和(环己基4-on-1-基)卡宾钨配合物6是通过在(乙氧基,甲基)卡宾钨配合物(OC)5 W C(OEt)CH 3 1a与α,β-不饱和叔酰胺PhCh CHC(O)NR 2 7的缩合反应中获得的。将POCl 3 / ET 3 N和(氯化钴)2 / ET 3 N,分别。化合物2经历了π-环化,两性离子η 1-环戊二烯配合物3。的缩合(整洁-烷基,乙氧基)卡宾配合物(CO)5中号C(OET)CH 2 - [R 1 1(M = W,铬; R 1 = C ^ -C 7 ħ 7,Ñ -Pr)用化合物7,得到(环丁烯基)卡宾络合物9。