Enantioselective Synthesis of (−)-Terpestacin and Structural Revision of Siccanol Using Catalytic Stereoselective Fragment Couplings and Macrocyclizations
The application is directed to compounds of Formula I-A
and pharmaceutically acceptable salts and solvates thereof, wherein Cy, R
1a
-R
3a
, R
4a
, and R
4b
are defined as set forth in the specification. The invention is also directed to use of compounds of Formula I-A to treat disorders responsive to the modulation of one or more opioid receptors, or as synthetic intermediates. Certain compounds of the present invention are especially useful for treating pain.
A highly selective, environmentally friendly, and scalable electrochemical protocol for the construction of α-acyloxy sulfides, through the synergistic effect of self-assembly-induced C(sp3)–H/O–H cross-coupling, is reported. It features exceptionally broad substrate scope, high regioselectivity, gram-scale synthesis, construction of complex molecules, and applicability to a variety of nucleophiles
Silica-promoted facile synthesis of thioesters and thioethers: a highly efficient, reusable and environmentally safe solid support
作者:Basudeb Basu、Susmita Paul、Ashis K. Nanda
DOI:10.1039/b925620b
日期:——
An efficient, mild and rapid procedure for the acylation and alkylation of aromatic and aliphatic thiols mediated on a silica gel surface at room temperature is described. The protocol allows the protection of thiols under neutral heterogeneous conditions without requiring any bases or Lewis acids, and the silica gel used as the promoter can be recycled for several runs without any loss of activity.
AGENT FOR PREVENTING OR TREATING PANCREAS CANCER, OVARY CANCER OR LIVER CANCER CONTAINING NOVEL WATER-SOLUBLE PRODRUG
申请人:CHUGAI SEIYAKU KABUSHIKI KAISHA
公开号:EP1938823A1
公开(公告)日:2008-07-02
Preventive or therapeutic agents for pancreatic cancer, ovarian cancer, or liver cancer of the present invention comprise a water-soluble prodrug represented by formula 1 described below, or a pharmaceutically acceptable salt, or a hydrate or solvate of the prodrug or pharmaceutically acceptable salt,
(wherein,
R1 represents a hydrogen atom, or a C1-C6 alkyl group;
W represents a divalent group comprising a tertiary amino group or a divalent group comprising a sulfonyl group, and
Y represents a residue of a compound represented by Y-OH comprising an alcoholic hydroxyl group, wherein said Y-OH is a camptothecin, a taxane, or an anticancer nucleotide).
A tetrazolinone compound represented by formula (1):
wherein R
1
represents a C1-C6 alkyl group; R
2
, R
3
, and R
4
are the same or different and represent a hydrogen atom; R
5
represents a C1-C3 alkyl group optionally having one or more halogen atoms; Y represents #-C(R
A1
R
A2
)—Z— in which left end and Q are bound to each other, and R
A1
and R
A2
each represents a hydrogen atom; Q represents a divalent C3-C10 carbocyclic group; X represents an oxygen atom; and A represents a C6-C10 aryl group, has excellent control activity against pests.