Palladium-Catalyzed Oxidative Double CH Functionalization/Carbonylation for the Synthesis of Xanthones
作者:Hua Zhang、Renyi Shi、Pei Gan、Chao Liu、Anxing Ding、Qiuyi Wang、Aiwen Lei
DOI:10.1002/anie.201201050
日期:2012.5.21
Two at once: Xanthones with different functional groups were obtained with CO (balloon) in the presence of a simple catalytic system that consists of Pd(OAc)2, K2S2O8, and trifluoroacetic acid (see scheme). Preliminary mechanism studies reveal that the second CHfunctionalization might be the rate‐determining step.
一次两个:在简单的催化体系(由Pd(OAc)2,K 2 S 2 O 8和三氟乙酸组成)的存在下,用CO(气球)获得具有不同官能团的氧杂蒽。初步的机理研究表明,第二个CH功能化可能是决定速率的步骤。
Spirolactones of xanthene. IV New method of xanthone synthesis by oxidation of novel spirolactones of dibenzo[c,h]xanthene and xanthenes.
作者:MICHIO KIMURA、ICHIZO OKABAYASHI
DOI:10.1248/cpb.35.136
日期:——
Dibenzo [c, h] xanthone and halogen-and methyl-substituted xanthones have been synthesized by the oxidation of novel spirolactones of dibenzo [c, h] xanthene and xanthene, which were prepared by a new condensation reaction of 1-naphthol or phenol derivatives with oxalic acid in the presence of sulfuric acid. The oxidation was carried out by using potassium permanganate in the presence of aqueous potassium hydroxide. The dibenzo [c, h] xanthone and xanthones were identical with samples obtained by another synthetic route.
Efficient syntheses of 14H-dinaphtho[1,8-bc:1',8'-fg]oxocin-14-one (2), 14H-dinaphtho[1,8-bc:1',2'-f]oxepin-14-one (3), and 2,2'(2H,2'H)-spirobi[naphtho[1,8-bc]furan] (9) are described. The putative structure of 2 has been reported previously, but the synthetic route was not reproducible. 7H-Dibenzo[c,h]xanthen-7-one (4), a known compound, was obtained by a different method. Possible reaction mechanism
SPIRO DIHYDROACRIDINE DERIVATIVES AND THE USE THEREOF AS MATERIALS FOR ORGANIC ELECTROLUMINESCENCE DEVICES
申请人:Stoessel Philipp
公开号:US20140316134A1
公开(公告)日:2014-10-23
The present invention relates to compounds of formulae (1), (2) or (3) that are suitable for use in electronic devices, and to electronic device, in particular organic electroluminescence devices, containing these compounds.
Spiro dihydroacridine derivatives and the use thereof as materials for organic electroluminescence devices
申请人:Merck Patent GmbH
公开号:US10305040B2
公开(公告)日:2019-05-28
The present invention relates to compounds of formulae (1), (2) or (3) that are suitable for use in electronic devices, and to electronic device, in particular organic electroluminescence devices, containing these compounds.