Triisopropylsilyl (TIPS) Alkynes as Building Blocks for Syntheses of Platinum Triisopropylsilylpolyynyl and Diplatinum Polyynediyl Complexes

Triisopropylsilyl (TIPS) Alkynes as Building Blocks for Syntheses of Platinum Triisopropylsilylpolyynyl and Diplatinum Polyynediyl Complexes
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三异丙基甲硅烷基 (TIPS) 炔烃作为合成铂三异丙基甲硅烷基聚炔基和二铂聚炔二基络合物的结构单元

DOI:
10.1021/acs.organomet.9b00368
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发表时间:
2019
期刊:
影响因子:
2.8
通讯作者:
Gladysz, John A.
Gladysz, John A.
中科院分区:
化学2区
文献类型:
--
作者:
Weisbach, Nancy;Kuhn, Helene;Amini, Hashem;Ehnbom, Andreas;Hampel, Frank;Reibenspies, Joseph H.;Hall, Michael B.;Gladysz, John A.

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反式-(p-TOL)(p-tol3P)2PT(C≡C)2H(PtTC4H)和过量H(C≡C)2Si-i-Pr3(TIPSC4H)的氧化交叉偶联(O2/CuClTMEDA)得到PtTC8TIPS(55%)。随后加入n-Bu4N+F-,重复HAY方案,得到PtTC12TIPS(56%)和byproducttrans-i-Pr3Si(C≡C)2(p-tol3P)2Pt(C≡C)6Si-i-Pr3(TIPSC4PtC12TIPS,5%;另一个周期得到PtTC16TIPS(13%)。TIPSCxHyieldPtFC6TIPS(x=2,58%)和PtFC8TIPS(x=4,23%)与反式(C6F5)(p-tTol3P)2PT(C≡C)2H(PtFC4H)的类似交叉偶联。每一个都用n-Bu4N+F-处理,并用TIPSC4HgivesPtFC10TIPS(58%)和PtFC12TIPS(47%)重复Hay协议。当干草条件应用于PtFCxTIPS(x=6,8,10,12)而没有交叉偶联伙伴时,发生同偶联到PtFC2xPtF(68-99%)。反式-(p-tol3P)2PtCl2与TIPSC4H(4.5当量;CAT)的反应。CuI,CH2Cl2/HNEt2)得到TIPSC4PtC4TIPS(95%)。HC4PtC4H与TIPSC4H的交叉偶联高于TIPSC4PtC4TIPS(6%)、TIPSC4PtC8TIPS(12%)、TIPSC8PtC8TIPS(10%)、TIPSC4PtC12TIPS(7%)和TIPSC8PtC12TIPS(3%)。尽管TIPS可以是一个更好的保护基团,但在前面的反应中,它并不比三乙基硅基有优势。PtTC8TIPS,PtTC12TIPS,PtFC6TIPS,PtFC8TIPS,TIPSC4PtC4TIPS,TIPSC8PtC8TIPS,TIPSC4PtC12TIPS的晶体结构。和PtFC20PtF。最后一种是迄今为止最长的双金属聚苯醚。用密度泛函理论计算精确地模拟了碳原子的~(13)C核磁共振化学位移。
Hay oxidative cross coupling (O2/CuCl/TMEDA) oftrans-(p-tol)(p-tol3P)2Pt(C≡C)2H (PtTC4H) and excess H(C≡C)2Si-i-Pr3(TIPSC4H) givesPtTC8TIPS(55%). Subsequent addition ofn-Bu4N+F–and repetition of the Hay protocol yieldsPtTC12TIPS(56%) and the byproducttrans-i-Pr3Si(C≡C)2(p-tol3P)2Pt(C≡C)6Si-i-Pr3(TIPSC4PtC12TIPS, 5%); another cycle givesPtTC16TIPS(13%). Analogous cross couplings oftrans-(C6F5)(p-tol3P)2Pt(C≡C)2H (PtFC4H) and excessTIPSCxHyieldPtFC6TIPS(x= 2, 58%) andPtFC8TIPS(x= 4, 23%). Each is treated withn-Bu4N+F–, and repetition of the Hay protocol withTIPSC4HgivesPtFC10TIPS(58%) andPtFC12TIPS(47%). When the Hay conditions are applied toPtFCxTIPS(x= 6, 8, 10, 12) without a cross-coupling partner, homocoupling toPtFC2xPtFoccurs (68–99%). The reaction oftrans-(p-tol3P)2PtCl2andTIPSC4H(4.5 equiv; cat. CuI, CH2Cl2/HNEt2) yieldsTIPSC4PtC4TIPS(95%). Hay cross coupling ofHC4PtC4Hand excessTIPSC4HgivesTIPSC4PtC4TIPS(6%),TIPSC4PtC8TIPS(12%),TIPSC8PtC8TIPS(10%),TIPSC4PtC12TIPS(7%), andTIPSC8PtC12TIPS(3%). Although TIPS can be a superior protecting group, it offers no advantage vs triethylsilyl in the preceding reactions. The crystal structures ofPtTC8TIPS,PtTC12TIPS,PtFC6TIPS,PtFC8TIPS,TIPSC4PtC4TIPS,TIPSC8PtC8TIPS,TIPSC4PtC12TIPS. andPtFC20PtFare determined. The last is the longest dimetallapolyyne so characterized to date. The13C NMR chemical shifts of the sp carbon atoms are accurately modeled by DFT calculations.
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