Access to acridones by tandem copper(<scp>i</scp>)-catalyzed electrophilic amination/Ag(<scp>i</scp>)-mediated oxidative annulation of anthranils with arylboronic acids
An efficient and practical approach for the synthesis of medicinally important acridones was developed from anthranils and commercially available arylboronic acids by a tandem copper(I)-catalyzed electrophilic amination/Ag(I)-mediated oxidative annulationstrategy. This new and straightforward protocol displayed a broad substrate scope (25 examples) and high functional group tolerance. What's more
The reaction of o-aminoacetophenones and arylboronic acids catalyzed by copper(II) salts in the presence of pyridine under an O2 atmosphere provides a general and efficient one-pot preparation of biologically interesting acridones. This relay reaction comprises an intermolecular Suzuki cross-coupling, intramolecular oxidative C(sp3)–H amination, and C(sp2)–H activation with simultaneous rearrangement
Copper-catalyzed C–C bond cleavage and intramolecular cyclization: an approach toward acridones
作者:Wang Zhou、Youqing Yang、Yong Liu、Guo-Jun Deng
DOI:10.1039/c2gc36502b
日期:——
A copper-catalyzed approach for the synthesis of acridones via C–Cbondcleavage and intramolecular cyclization using air as the oxidant under neutral conditions is described. This transformation offers an alternative method to prepare medicinally important acridones and a new strategy for C–Cbondcleavage.
An aromatic graft polymer containing one or more kinds of repeating units represented by the following formula (1). (In the formula, Ar
1
represents a divalent residue of a π-conjugated cyclic compound having a side chain represented by the following formula (2), the side chain being bonded to a carbon atom which is included in the ring structure of the divalent π-conjugated-cyclic-compound residue represented by Ar
1
and has an sp
2
hybrid orbital: (wherein Ar
2
represents a divalent group having a residue of a π-conjugated cyclic compound; X
1
represents a direct bond or a divalent group selected from the group consisting of NQ
1
-, —PQ
2
-, and —BQ
3
-, wherein Q
1
to Q
3
each independently represents a substituent; Z represents a direct bond or a divalent connecting group; k is an integer of 3 or larger; and E
1
represents hydrogen, halogeno, or a monovalent organic group, provided that when two or more Ar
2
's, X
1
's, and Z's are present, then they each may be the same or different and when two or more side chains represented by the formula (2) are present, then they may be the same or different.))
An aromatic graft polymer containing one or more kinds of repeating units represented by the following formula (1). (In the formula, Ar1 represents a divalent residue of a π-conjugated cyclic compound having a side chain represented by the following formula (2), the side chain being bonded to a carbon atom which is included in the ring structure of the divalent π-conjugated-cyclic-compound residue represented by Ar1 and has an sp2 hybrid orbital: (wherein Ar2 represents a divalent group having a residue of a π-conjugated cyclic compound; X1 represents a direct bond or a divalent group selected from the group consisting of NQ1-, -PQ2-, and -BQ3-, wherein Q1 to Q3 each independently represents a substituent; Z represents a direct bond or a divalent connecting group; k is an integer of 3 or larger; and E1 represents hydrogen, halogeno, or a monovalent organic group, provided that when two or more Ar2' s, X1' s, and Z's are present, then they each may be the same or different and when two or more side chains represented by the formula (2) are present, then they may be the same or different.))