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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Synthesis of Some Di‐ and Tetraphosphonic Acids by Suzuki Cross‐Coupling
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Synthesis of Some Di‐ and Tetraphosphonic Acids by Suzuki Cross‐Coupling

机译:Suzuki交叉耦合的合成一些二磷酸

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> Five diphosphonic acids, namely, benzene‐1,4‐bis‐ p ‐phenylphosphonic acid ( 1 ), anthracene‐9,10‐bis‐ p ‐phenylphosphonic acid ( 2 ), benzene‐1,2‐bis‐ p ‐phenylphosphonic acid ( 3 ), benzene‐1,3‐bis‐ p ‐phenylphosphonic acid ( 4 ), and biphenyl‐4,4′‐bis‐ p ‐phenylphosphonic acid ( 5 ) as well as three tetraphosphonic acids, namely, benzene‐1,2,4,5‐tetrakis‐ p ‐phenylphosphonic acid ( 6 ), tetrabiphenylsilane tetrakis‐4‐phosphonic acid ( 7 ), and pyrene‐1,3,6,8‐tetrakis‐ p ‐phenylphosphonic acid ( 8 ) and their dimethyl esters 1a – 8a were prepared via Suzuki cross‐coupling reactions involving p ‐dimethylphosphonatophenylboronic acid and brominated aromatics. The Suzuki cross‐coupling occurs under milder conditions than the transition metal catalyzed Arbuzov reaction usually applied for the preparation of dialkyl phosphonates. For the same starting material both reactions are complementary and yield phosphonic acids with different spacer lengths, which was exemplified for tetrakis(4‐bromophenyl)silane. Suzuki cross‐coupling gives rise to 7 , whereas the Arbuzov reaction produces tetraphenylsilane tetrakis‐4‐phosphonic acid.
机译: >五二膦酸,即苯-1,4-双 - p - 苯基膦酸( 1 ),蒽-9 ,10-bis- p - 苯基膦酸( 2℃),苯-1,2-双 - p - 苯基膦酸( 3 ),苯-1,3-双 - P - 苯基膦酸( 4),和联苯-4,4'-BIS- p - 苯基膦酸( 5℃)以及三种四膦酸,即苯-1,2,4,5-四 - p - 苯基膦酸( 6 ),四苯基硅烷四 - 4-膦酸( 7 ),和芘-1,3,6,8-四 - p - 苯基膦酸( 8℃)及其二甲酯 1a - 8a 通过铃木交叉偶联反应制备,涉及 P磷酸苯基苯甲酸和溴化芳烃。铃木交叉耦合在比通常施加用于制备二烷基膦酸酯的过渡金属催化的arbuzov反应的升级条件下发生。对于相同的原料,两个反应是互补的,并产生具有不同间隔长度的膦酸,其举例说明了四(4-溴苯基)硅烷。铃木交叉偶联产生 7 / B>,而arbuzov反应产生四苯基硅烷四膦酸。

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