Rhodium‐Catalyzed [3+2]‐Annulation of<i>ortho‐</i>Diazoquinones with Enol Ethers: Diversity‐Oriented Total Synthesis of Aflatoxin B<sub>2</sub>
作者:Dinesh J. Paymode、Indrajeet Sharma
DOI:10.1002/ejoc.202100186
日期:2021.4.8
[3+2]‐cycloaddition of ortho‐diazoquinones with enol ethers has been developed to provide fused polycyclic 2,3‐dihydrobenzofurans, including diversity‐oriented total synthesis of aflatoxinB2. Additionally, the utility of this method was demonstrated to other aflatoxin family members and the central core skeleton of rocaglamide natural product.
MODIFIER FOR AROMATIC POLYESTER AND AROMATIC POLYESTER RESIN COMPOSITION COMPRISING THE SAME
申请人:TABATA Masayoshi
公开号:US20110224343A1
公开(公告)日:2011-09-15
The present invention provides a modifier for aromatic polyesters which enhances the melt fluidity of aromatic polyesters without a significant decrease in the heat resistance of the aromatic polyesters, and an aromatic polyester resin composition including the modifier for aromatic polyesters. The present invention relates to a modifier for aromatic polyesters comprising polyhydric phenol residues and residues of aromatic polycarboxylic acid, acid halide or acid anhydride thereof, and the modifier comprises a material having a structure composed of a first residue selected from the group consisting of divalent residues represented by Formula (I): —Ar—W
1
x
—Ar— and by Formula (II): —Ar—, the first residues being bonded to two identical or different second residues selected from the group consisting of monovalent residues represented by Formula (III):
and monovalent residues represented by Formula (IV): —O—C(O)—R
7
—.
A subject of the present invention is novel compounds comprising 2 or 3 benzothiazole-4,7-dione- or benzooxazole-4,7-dione-type units, which inhibit the cdc25 phosphatases, in particular cdc25-C phosphatase. These compounds can in particular be used in the treatment of cancer.
Benzothiazole-4,7-diones and benzoxazole-4,7-diones with substituents in position 5 or 6 and method for production thereof
申请人:Galcera Contour Marie-Odile
公开号:US20060135573A1
公开(公告)日:2006-06-22
A subject of the invention is a selective process for the preparation of derivatives of benzothiazole-4,7-diones and benzoxazole-4,7-diones monosubstituted in position 5 or in position 6 by an amino group itself optionally substituted. Said derivatives are inhibitors of the Cdc25 phosphatases and can be used for preparing medicaments intended to treat cancer. The invention also offers synthesis intermediates which are useful in implementing the process of the invention. The invention also relates in particular to the following derivatives of benzothiazole-4,7-diones: 2-(2-chloro-6-fluorophenyl)-5-[2-(dimethylamino)ethyl]amino}-1,3-benzothiazole-4,7-dione; 2-(2-chloro-6-fluorophenyl)-5-[(2-pyrrolidin-1-ylethyl)amino]-1,3-benzothiazole-4,7-dione.
The invention provides compounds of general formula (I) wherein A, X, m, R
1
, N, R
2
, Z
1
, Z
2
, Q, R
3
, R
4
, R
5
, R
6
, R
7
, R
8
, t and R
16
are as defined in the specification, processes for their preparation, pharmaceutical compositions containing them and their use in therapy.
1