Reaktive E=C(p-p)π-Systeme, XXVIII / Reactive E=C(p-p)π-Systems, XXVIII

Reaktive E=C(p-p)π-Systeme, XXVIII / Reactive E=C(p-p)π-Systems, XXVIII
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反应性 E=C(p-p)π-系统,XXVIII / 反应性 E=C(p-p)π-系统,XXVIII

DOI:
10.1515/znb-1991-0802
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发表时间:
1991
期刊:
Zeitschrift für Naturforschung B
影响因子:
--
通讯作者:
T. Großpietsch
T. Großpietsch
中科院分区:
--
文献类型:
--
作者:
J. Grobe;Duc Le Van;T. Großpietsch

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全氟-2-磷丙烯F_3CP = CF_2(1)与叔丁胺或异丙胺以1:3的摩尔比反应,分别得到新的亚氨基亚甲基膦F_3CP =C=N(tBu)[(2),30%产率]和F_3CP =C=N(iPr)[(3),5%]。2在室温下缓慢分解,得到叔丁基异腈和环膦(F3 CP)n(n = 3,4,5)。发现3比2更不稳定,并且例如被伯胺攻击。2与2,3-二甲基-1,3-丁二烯或三甲基膦的反应一方面产生双(三氟甲基)二膦(4)的环加成产物,另一方面产生磷酰Me 3 P = PCF 3(5)和(tBu)NC。2和3分别不是由(F_3C)_2PH和相应的伯胺在一系列HF消除和H_2NR加成反应中获得的。由(F3 C)2 PH和H2 N(iPr)的1:4摩尔混合物在一锅法中形成的主要产物显示为手性膦F3 CP [NH(iPr)]C[=N(iPr)]H(6)、F3 CP [NH(iPr)] CHF 2(7)和F3 CP [NH(iPr)] CH 2F(8)(60:35:5)。(F3 C)2 PH与H2 N(tBu)的相应反应主要产生化合物F3 CP [NH(tBu)] CH 2F(10)。
The reaction of perfluoro-2-phosphapropene F3CP=CF2 (1) with tert-butylamine or isopropylamine in a 1:3 molar ratio leads to the novel iminomethylene phosphanes F3CP=C=N(tBu) [(2), 30% yield] and F3CP=C=N(iPr) [(3), 5%], respectively. 2 slowly decomposes at room temperature giving tert-butylisonitrile and the cyclophosphanes (F3CP)n (n = 3, 4, 5). 3 is found to be less stable than 2 and for example is attacked by primary amines. The reaction of 2 with 2,3-dimethyl-1,3-butadiene or trimethylphosphane yields, on the one hand, the cycloaddition product of bis(trifluormethyl)diphosphene (4), and on the other hand, the phosphorus ylid Me3P=PCF3 (5) together with (tBu)NC. 2 and 3, respectively, are not obtained from (F3C)2PH and the corresponding primary amines in a series of HF elimination and H2NR addition reactions. The main products formed from a 1:4 molar mixture of (F3C)2PH and H2N(iPr) in a one-pot procedure were shown to be the chiral phosphanes F3CP[NH(iPr)]C[=N(iPr)]H (6), F3CP[NH(iPr)]CHF2 (7) and F3CP[NH(iPr)]CH2F (8) (60:35:5). The corresponding reaction of (F3C)2PH with H2N(tBu) mainly yields the compound F3CP[NH(tBu)]CH2F (10).