Cyclic β-diketones — precursors of chiral 1,3-cyclohexadiene iron carbonyl complexes. Ligand exchange — (−)-PPh2 (OHC∗(Me)-COOEt) — new, chiral, diastereomer-separating ligand in organoiron chemistry
作者:Andrej Boháč、Martina Lettrichová、Pavel Hrnčiar、Milan Hutta
DOI:10.1016/0022-328x(95)05761-d
日期:1996.1
A synthesis of new, chiral tricarbonyliron complexes (1, 2) from 1,3-cyclohexanedione and 5,5-dimethyl-1,3-cyclohexanedione (dimedone) after their conversion to 1,3-diacetoxy-1,3-cyclohexadienes and complexation with Fe2(CO)9 is described. Ligand-exchange reactions of complexes 1,2 with PPh3 (A), (−)-P(OHC)∗(Me)-COOEt)3 ‘(−)-TEOCEOP’ (B) and and (−)-PPh2(OHC∗(Me)-COOEt) ‘LACTODIPPHOS’ (C) were accomplished
的新的手性络合物tricarbonyliron的合成(1,2)从1,3-环己二酮和5,5-二甲基-1,3-环己二酮(双甲酮)的转换后,以1,3-二乙酰氧基-1,3-环己二烯和描述了与Fe 2(CO)9的络合。配合物1,2与PPh 3(A),(-)-P(OHC)*(Me)-COOEt)3 '(-)-TEOCEOP'(B)和(-)- PPh 2(OHC ∗(Me)-COOEt)'LACTODIPPHOS'(C)的收率很高。一种新的用于有机铁化学的预期手性配体,由可商购获得(发现有S)-(-)-乳酸乙酯,(-)-PPh 2(O = HC ∗(Me)-COOEt)(C)。借助配体C,(1,3-二乙酰氧基-1,3-环己二烯)Fe(Co)2 PPh 2(OHC ∗(Me)-COOet)配合物1C(IC 120和1C 160)的非对映异构混合物)已成功分离。