calculations. Methylation reactions of 9a with MeOTf yield triphosphan-1-ium Cy2MePP(Py)PCy2+ (10+) and triphosphane-1,3-diium Cy2MePP(Py)PMeCy22+ (112+) cations as triflate salts. Salt 11[OTf]2 reacts with pentaphospholane 13 in an unprecedented chain growth reaction to give the tetraphosphane-1,4-diium triflate salt Cy2MePP(Py)P(Py)PMeCy22+ (19[OTf]2) via a P–P/P–P bond metathesis reaction. The latter salt
三膦R' 2 PP(R)PR' 2 ( 9a,c : R = Py; 9b R = BTz), 1,3-diphenyl-2-pyridyl-triphospholane 9d and pentaphospholanes (RP) 5 ( 13 : R = Py ; 18 : R = BTz) 以高达 98% 的高产率从二
吡唑基膦 RPpyr 2 ( 5 : R = Py; 6 : R = BTz; pyr =
1,3-二甲基吡唑基) 和相应的仲膦反应获得(R' 2 PH, R' = Cy ( 9a,b ), t Bu ( 9c );
PHPH(CH 2 ) 2
PHPh ( 9d))。衍
生物9a-d的形成通过缩合反应进行,而 13 和 18 的形成只能通过选择性加扰反应来解释。我们意识到反应结果强烈依赖于溶剂,正如对五
磷烷13的受控加扰反应途径所概述的那样。在我们将这些化合物用作
配体的进