An efficient procedure for the one-pot chemoselective synthesis of 2H-benzo[b][1,4]oxazin-3(4H)-one derivatives from their corresponding o-aminophenols is developed using DBU in the ionicliquid [omim][BF4]. Upon completion of the reaction and separation of the product, the ionicliquid is recovered and successfully reused over nine recycles without any noticeable loss of performance.
在离子液体中使用DBU开发了一种从其相应的邻氨基苯酚一锅化学选择合成2 H-苯并[ b ] [1,4]恶嗪-3(4 H)-one衍生物的有效方法。 [BF 4 ]。反应完成并分离出产物后,将离子液体回收并在9个循环中成功重复使用,而不会造成任何明显的性能损失。
A new reaction of acid chlorides. Intramolecular ortho-chlorination
作者:Maureen Byers、Alexander R. Forrester、I. Lennox John、Ronald H. Thomson
DOI:10.1039/p19810001092
日期:——
2-(2-Arylazophenoxy)-2-methylpropanoic acids (1) react with thionyl chloride to form 4-(2-chloroanilino)-benzoxazinones (3) in high yield. The reaction proceeds through the acidchloride which undergoes cyclisation with intramolecular electrophilic transfer of the chlorine to ring B. This selective ortho-chlorination is general for azo-acids (1) in which ring B contains a free ortho-position and –M
Triazole derivatives and pharmaceutical compositions containing the derivatives are disclosed as being useful in inhibiting the activity of the receptor protein tyrosine kinase Axl. Methods of using the derivatives in treating diseases or conditions associated with Axl catalytic activity are also disclosed.
To provide a novel and excellent agent for treating or preventing nociceptive pain, neuropathic pain, cancer pain, headache, bladder function disorder and the like, based on the inhibitory action on the capsaicin receptor VR1 activation.
The present invention was accomplished by confirming that a benzamide derivative characterized by the possession of a benzene ring in which a single ring is condensed on the nitrogen atom of amido group and possession of a lower alkylamino or an amino group substituted with a ring group at the neighboring position of said amido group has a strong inhibitory action on VR1 activation and excellent pharmacological actions based on this and by finding that it can become an excellent agent for treating or preventing VR1-involved diseases such as nociceptive pain, neuropathic pain, cancer pain, headache, bladder function disorder and the like.
Derivatives of 4-piperazin-1-yl-4-benzo[b]thiophene suitable for the treatment of cns disorders
申请人:Yamashita Hiroshi
公开号:US20090264404A1
公开(公告)日:2009-10-22
A heterocyclic compound or a salt thereof represented by the formula (1): where R
2
represents a hydrogen atom or a lower alkyl group; A represents a lower alkylene group or lower alkenylene group; and R
1
represents an aromatic group or a heterocyclic group. The compound of the present invention has a wide treatment spectrum for mental disorders including central nervous system disorders, no side effects and high safety.