已经开发出定义明确且有效的POCN连接的钯络合物,用于将唑类与芳基碘化物直接进行C–H键芳基化。的膦酸酯-胺配体钳形1-(R 2 PO)-C 6 H ^ 4 -3-(CH 2 Ñ我镨2)[ R 2 POCN IPR2 -H; R = i Pr(1a),R = t Bu(1b)]和相应的钯配合物{2-(R 2 PO)-C 6 H 3 -6-(CH 2 N i Pr 2)} PdCl [(R2 POCN iPr2氯化钯; R = i Pr(2a),R = t Bu(2b)]以高收率合成。用KI和AgOAc处理钯配合物2a分别得到配合物(iPr2 POCN iPr2)PdI(3a)和(iPr2 POCN iPr2)Pd(OAc)(4a)。类似地,2a与苯并噻唑基-锂的反应以定量收率产生了(iPr2 POCN iPr2)Pd(苯并噻唑基)(5a)络合物。夹钯复合物2a在CuI作为助催化剂的条件下,
已经开发出定义明确且有效的POCN连接的钯络合物,用于将唑类与芳基碘化物直接进行C–H键芳基化。的膦酸酯-胺配体钳形1-(R 2 PO)-C 6 H ^ 4 -3-(CH 2 Ñ我镨2)[ R 2 POCN IPR2 -H; R = i Pr(1a),R = t Bu(1b)]和相应的钯配合物{2-(R 2 PO)-C 6 H 3 -6-(CH 2 N i Pr 2)} PdCl [(R2 POCN iPr2氯化钯; R = i Pr(2a),R = t Bu(2b)]以高收率合成。用KI和AgOAc处理钯配合物2a分别得到配合物(iPr2 POCN iPr2)PdI(3a)和(iPr2 POCN iPr2)Pd(OAc)(4a)。类似地,2a与苯并噻唑基-锂的反应以定量收率产生了(iPr2 POCN iPr2)Pd(苯并噻唑基)(5a)络合物。夹钯复合物2a在CuI作为助催化剂的条件下,
Mono- and binuclear palladacycles via regioselective C–H bond activation: syntheses, mechanistic insights and catalytic activity in direct arylation of azoles
作者:Dilip K. Pandey、Shrikant M. Khake、Rajesh G. Gonnade、Benudhar Punji
DOI:10.1039/c5ra18289a
日期:——
Hybrid “POCN”-ligated mono- and binuclear palladacycles have been synthesized via the base-assisted regioselective C–H bond activation, and their mechanistic aspects and catalytic application for the arylation of azoles have been described.
Design and development of POCN-pincer palladium catalysts for C–H bond arylation of azoles with aryl iodides
作者:Shrikant M. Khake、Vineeta Soni、Rajesh G. Gonnade、Benudhar Punji
DOI:10.1039/c4dt01547a
日期:——
complex 2a efficiently catalyzes the C–Hbondarylation of benzothiazole, substituted-benzoxazoles and 5-aryl oxazoles with diverse aryl iodides in the presence of CuI as a co-catalyst under mild reaction conditions. This represents the first example of a pincer palladium complex being applied for the direct C–Hbondarylation of any heterocycle with low catalyst loading. A preliminary mechanistic investigation
已经开发出定义明确且有效的POCN连接的钯络合物,用于将唑类与芳基碘化物直接进行C–H键芳基化。的膦酸酯-胺配体钳形1-(R 2 PO)-C 6 H ^ 4 -3-(CH 2 Ñ我镨2)[ R 2 POCN IPR2 -H; R = i Pr(1a),R = t Bu(1b)]和相应的钯配合物2-(R 2 PO)-C 6 H 3 -6-(CH 2 N i Pr 2)} PdCl [(R2 POCN iPr2氯化钯; R = i Pr(2a),R = t Bu(2b)]以高收率合成。用KI和AgOAc处理钯配合物2a分别得到配合物(iPr2 POCN iPr2)PdI(3a)和(iPr2 POCN iPr2)Pd(OAc)(4a)。类似地,2a与苯并噻唑基-锂的反应以定量收率产生了(iPr2 POCN iPr2)Pd(苯并噻唑基)(5a)络合物。夹钯复合物2a在CuI作为助催化剂的条件下,