An Organotin Route for the Preparation of 2,6‐Bis(diphenylphosphino)bromo‐benzene and the Related Bis(Phosphine Oxide). Precursors for Novel Ligands
作者:Fabio Meyer、Thomas Kuzmera、Enno Lork、Matthias Vogt、Jens Beckmann
DOI:10.1002/zaac.202100210
日期:2021.10.12
R=Bu) were prepared from commercial products. With Ph2PLi, 1 and 2 underwent nucleophilic substitution to give the 2,6-bis(diphenylphosphino)phenyltrialkylstannanes 2,6-(Ph2P)2C6H3SnR3 (3, R=Me; 4, R=Bu). The reaction of 3 with n-BuLi and BrCH2CH2Br afforded 2,6-bis(diphenylphosphino)bromobenzene (2,6-(Ph2P)2C6H3Br, 5), the oxidation of which gave the related bis(phosphine oxide) 2,6-[Ph2P(O)]2C6H3Br
2,6-二氟苯基三烷基锡烷2,6-F 2 C 6 H 3 SnR 3 ( 1,R=Me;2,R=Bu)由商业产品制备。使用Ph 2 PLi,1和2进行亲核取代得到2,6-双(二苯基膦基)苯基三烷基锡烷2,6-(Ph 2 P) 2 C 6 H 3 SnR 3 ( 3 , R=Me; 4 , R=卜)。的反应3与Ñ正丁基锂和BRCH 2 CH 2Br得到2,6-双(二苯基膦基)溴苯(2,6-(Ph 2 P) 2 C 6 H 3 Br, 5 ),其氧化得到相关的双(氧化膦) 2,6-[Ph 2 P(O)] 2 C 6 H 3 Br ( 6 )。5与n- BuLi反应生成 2,6-双(二苯基膦基)苯基锂、2,6-(Ph 2 P) 2 C 6 H 3 Li ( 7 )。尝试制备相关的双(氧化膦)2,6-[Ph 2 P(O)] 2来自6 的C 6 H 3 Li ( 8 )在低温下以类似的方式受到分解的