General strategy for inducing C–H bond fission (cycloiridation) in some aryl, heterocyclic, alkenyl or alkyl groups in azines derived from aldehydes or methyl ketones
作者:Sarath D. Perera、Bernard L. Shaw、Mark Thornton-Pett
DOI:10.1039/dt9950001689
日期:——
[IrCl(CO)2(H2NC6H4Me-p)] in benzene at 75 °C for 5 min it underwent an aryl C–H bond fission to give the cyclometallated chlorocarbonyliridium(III) hydride [[graphic omitted]H(OMe)3-3,4,5]}]1a. The crystal structure of 1a showed that (i) oxidative addition of the aryl C–H bond to iridium was cis with the hydride ligand trans to chloride, and (II) the cyclometallated azine ligand was in the terdentate mer
膦Z -PPh 2 CH 2 C(Bu t)NNH 2 I已被证明是一种方便的“试剂”,用于将醛或酮转化为嗪,然后可以通过CH键裂变快速环化以生成铱(III)氢化物。的缩合我与一系列取代的苯甲醛的(RCHO),得到类型的混合吖嗪Ž,ë -PPh 2 CH 2 C(卜吨)N-N CHR [R = C 6 H ^ 2(OME)3 -3,4, 5 IIA,博士IIb,C 6 H 4 OMe-4 IIc,C 6 H 4 NO 2 -4 IId,C 6 H 4 Br-2 IIe,C 6 H 4 Cl-2 IIf,C 6 H 4 F-2 IIg,C 6 H 4 OH-2 IIh或C 6 H 2(OH-2)(OMe)2 -4,6,IIi ]。该ž,ē构型对于随后的环金属化是必要的,并且当将嗪IIa在苯中于75°C下用[IrCl(CO)2(H 2 NC 6 H 4 Me- p)]处理5分钟时,它会发生芳基
A general method of promoting oxidative addition of C–H bonds to iridium(<scp>I</scp>) using azine phosphines
作者:Sarath D. Perera、Bernard L. Shaw
DOI:10.1039/c39940001203
日期:——
Treatment of [IrCl(CO)2(p-toludine)] with azine phosphines of type Z,E-PPh2CH2C(But)NâNC(Q)R, Q = H or Me, R = an organic group, activates aryl, heterocyclic, alkenyl or aliphatic CâH bonds to give cyclometallated iridium(III) hydrides.
用 Z,E-PPh2CH2C(But)N−NC(Q)R 型吖嗪膦处理 [IrCl(CO)2(p-toludine)],Q = H 或 Me,R = 有机基团,活化芳基、杂环、烯基或脂肪族C-H键,得到环金属化铱(III)氢化物。
Cyclometallation of azine phosphines of type Z,E-PPh<sub>2</sub>CH<sub>2</sub>C(Bu<sup>t</sup>)N–NCHR (R = an aromatic or heterocyclic group) involving X–Y (X = C, N or O; Y = H, I or Br) bond fission by platinum(<scp>II</scp>)
作者:Sarath D. Perera、Bernard L. Shaw
DOI:10.1039/dt9950000641
日期:——
converting aryl or heterocyclic aldehydes into azines which can then be cycloplatinated readily with C–H, C–I, C–Br, N–H or O–H bond fission. Condensation of 1 with benzaldehyde derivatives (RCHO) gave mixedazines of type Z,E-PPh2CH2C(But)N–NCHR [R = Ph 2a, C6H2(OMe)3-3,4,5 2b, C6H4NO2-4 2c, C6H4I-2 2d, C6H4Br-2 2e, C6H4Cl-2 2f or C6H2(OH-2)(OMe)2-4,6 2g]. The azines 2a–2f reacted with [PtMe2(cod)](cod = cycloocta-1