Propyne Iminium Salts and Phosphorus(III) Nucleophiles: Synthesis of (3-Morpholinoallenyl)phosphanes and -phosphane Oxides or 1-(Morpholinopropargyl)phosphanes and -phosphonates
作者:Martin Reisser、Alexandra Maier、Gerhard Maas
DOI:10.1002/ejoc.200300080
日期:2003.6
Treatment of 4-(1,3-diphenyl-l-propynylidene)morpholinium triflate (1a) with the neutral phosphorus nucleophiles Me3Si−PPh2, Me3Si−P(Ph)C5H11, and Me3SiO−PPh2 affords (3-morpholinoallenyl)phosphanes 4 and 5 and (3-morpholinoallenyl)phosphane oxide 11, respectively. In contrast to these conjugate addition reactions at the ambident propyne iminium moiety of 1a, nucleophilic attack by Me3Si−PEt2 and Me3SiO−P(OEt)2
用中性磷亲核试剂 Me3Si-PPh2、Me3Si-P(Ph)C5H11 和 Me3SiO-PPh2 处理 4-(1,3-二苯基-1-丙炔基)吗啉三氟甲磺酸盐 (1a) 得到 (3-吗啉代烯基) 膦 4 和5 和(3-吗啉代烯基)氧化膦 11。与 1a 的 ambient propyne 亚胺部分的这些共轭加成反应相反,Me3Si-PEt2 和 Me3SiO-P(OEt)2 的亲核攻击发生在亚胺功能上并产生 (1-morpholinopropargyl)phosphane 6 和 (1-morpholinopropargyl )膦酸酯 12,分别。丙炔亚胺盐 1b 与 Me3Si-PPh2 反应形成 (3-morpholino-1,3-butadienyl) 膦氧化物 8。双(供体)取代的丙二烯 4 通过磷取代基的氧化转化为推拉取代的丙二烯基膦氧化物 11.