Potassium-Mediated Hydrophosphorylation of Heterocumulenes with Diarylphosphane Oxide and Sulfide
作者:Stephan M. Härling、Helmar Görls、Sven Krieck、Matthias Westerhausen
DOI:10.1021/acs.inorgchem.6b01973
日期:2016.10.17
(E = O, S). The catalytic conversion of iPr-N═C═E′ (E′ = O, S) and of R-N═C═N-R (R = iPr, cHex) to the addition products Ar2P(E)-C(=E′)-NHR (Ar = Ph, Mes; E = O, S; E′ = O, S, NR) was studied in the presence of catalytic amounts of Ar2PEK (Ar = Ph, Mes; E = O, S). Steric hindrance prevents the addition of dimesitylphosphane oxide to N,N′-diisopropylcarbodiimide, whereas diphenylphosphane oxide and sulfide
氢化磷酸化催化剂的制备成功地通过在醚溶剂(例如四氢吡喃(THP)和四氢呋喃(THF))中用氢化钾金属化二甲基异戊烷氧化物和二苯基膦硫醚生成四聚体[(thp)K(OPMes 2)] 4(1a)和[(thf)3 K(OPMes 2)} 4 ](1b)以及[(thp)KSPPh 2 ] ∞(2)具有处于结晶态的链状结构。在醚溶液中,这些络合物非常缓慢地降解为KPAr 2和KE 2 PAr 2(E = O,S)。iPr-N═C═E'(E'= O,S)和RN═C═NR(R = i Pr,c Hex)催化转化为加成产物Ar2P(E)-C(= E' )-NHR(Ar = Ph,Mes; E = O,S; E'= O,S,NR)在催化量的Ar 2 PEK(Ar = Ph,Mes; E = O,S)存在下进行了研究。立体位阻可阻止向N,N'-二异丙基碳二亚胺中添加二甲基间膦氧化物,而二苯基膦氧化物和硫化物可平稳地添加至i