Synthesis, structure, and reactivity of fluorous phosphorus/carbon/phosphorus pincer ligands and metal complexes
作者:Róbert Tuba、Verona Tesevic、Long V. Dinh、Frank Hampel、J. A. Gladysz
DOI:10.1039/b502309b
日期:——
3-C6H4(CH3)(CH2P(CH2CH2R(fn))2)(4-R(fn)) in 1 : 3 to 1 : 5 ratios. Workups give -R(fn) in 4--17% yields. Similar results are obtained photochemically. Reaction of 1,3-C6H4(CH2Br)2 and HP(CH2CH2R(f8))2 (5) at 80 degrees C (neat, 1 : 2 mol ratio) gives instead of simple substitution the metacyclophane [1,3-C6H4(CH2P(CH2CH2R(f8))2 CH2-1,3-C(6)H(4)CH(2)P[lower bond 1 end](CH2CH2R(f8))2C[upper bond 1 end]H2](2+)2Br-
二膦1,3-C6H4(CH2PH2)2与氟代烯烃H2C = CHR(fn)(R(fn)=(CF2)(n-1)CF3; n = 6,8)在75°C下的反应AIBN的存在会给出标题配体1,3-C6H4(CH2P(CH2CH2R(fn))2)2(3-R(fn))和副产物1,3-C6H4(CH3)(CH2P(CH2CH2R(fn))2 )(4-R(fn))的比例为1:3至1:5。后处理以4--17%的产率得到-R(fn)。光化学获得相似的结果。1,3-C6H4(CH2Br)2与HP(CH2CH2R(f8))2(5)在80摄氏度下(纯,摩尔比为1:2)反应,得到的不是简单的取代,而是亚甲基[1,3-C6H4( CH2P(CH2CH2R(f8))2 CH2-1,3-C(6)H(4)CH(2)P [低键1端](CH2CH2R(f8))2C [高键1端] H2](2 +)2Br-,经LiAlH(4)处理后