Catalytic activity of dicationic platinum(II) and rhodium(II) complexes towards 9-diazofluorene
Catalytic activity of dicationic platinum(II) and rhodium(II) complexes towards 9-diazofluorene
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DOI：
10.1016/s1387-7003(01)00176-9
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发表时间：
2001-06-01
影响因子：
3.8
通讯作者：
Zecca, M
中科院分区：
文献类型：
--
作者：
Bertani, R;Michelin, RA;Zecca, M
9-在1mol%的双阳离子铂配合物cis-[Pt（PPh 3）（2）（CH 3CN）（2）][BF 4]（2）（1）存在下，重氮芴（difluorene，difluorene）在25 ℃下于CH 2Cl 2中催化分解，高产率地得到烯烃产物9，9 ' -二芴叉基。此外，在CH 2Cl 2/MeOH（CH 2Cl 2/MeOH摩尔比为1/20）中，在1摩尔%的1存在下，在25 ℃下，使9-甲氧基芴发生插入甲醇的O-H键的反应，以优异的产率得到9-甲氧基芴。中性或阳离子dirhodium（II）配合物作为催化剂，相同的反应产生进一步的产品，表明存在不同的平行反应途径。(C)2001爱思唯尔科技有限公司。保留所有权利。
9-Diazofluorene (DAF) is catalytically decomposed at 25 degreesC in CH2Cl2 in the presence of 1 mol% of the dicationic platinum(II) complex cis-[Pt(PPh3)(2)(CH3CN)(2)][BF4](2) (1) to give the olefin product 9,9 ' -bifluorenylidene in high yield. Furthermore, DAF undergoes an insertion reaction into the O-H bond of methanol at 25 degreesC in CH2Cl2/MeOH (DAF/MeOH molar ratio 1/20) in the presence of 1 mol%, of 1 to give 9-methoxyfluorene in excellent yield. With neutral or cationic dirhodium(II) complexes as catalysts the same reaction yields further products, suggesting the existence of different parallel reaction pathways. (C) 2001 Elsevier Science B.V. All rights reserved.