Gold Sulfonium Benzylide Complexes Undergo Efficient Benzylidene Transfer to Alkenes
作者:Robert G. Carden、Ross A. Widenhoefer
DOI:10.1002/chem.201902845
日期:2019.8.22
gold sulfonium benzylide complexes [(P1)AuCHPh(SR1 R2 )]+ B[3,5-CF3 C6 H3 ]4 }- [P1=P(tBu)2 o-biphenyl; R1 , R2 =-(CH2 )4 - (1 a); R1 =Et, R2 =Ph (1 b); R1 =R2 =Ph (1 c)] were synthesized by reaction of the gold α-chloro benzyl complex (P1)AuCHClPh with sodium tetrakis[3,5-bis(trifluoromethyl)phenyl]borate and excess sulfide. Complexes 1 undergo efficient benzylidene transfer to alkenes and DMSO under
sulf金亚苄基络合物[(P1)AuCHPh(SR1 R2)] + B [3,5-CF3 C6 H3] 4}-[P1 = P(tBu)2邻联苯; R1,R2 =-(CH2)4-(1a);R1 = Et,R2 = Ph(1b);通过金α-氯苄基络合物(P1)AuCHClPh与四[3,5-双(三氟甲基)苯基]硼酸钠和过量的硫化物反应合成R1 = R2 = Ph(1 c)]。配合物1在温和的条件下无需外部活化即可有效地将亚苄基转移至烯烃和DMSO。1 c与苯乙烯反应的动力学分析与阳离子金亚苄基络合物[(P1)AuCHPh] +(I)的中间体一致。