The first example of ring expansion from a five-membered nitrogen-containing ring to a seven-membered heterocyclic ring has been developed.
将一种含氮五元环扩展为七元杂环环的第一个例子已经研发出来。
Synthesis of Fused Indazole Ring Systems and Application to Nigeglanine Hydrobromide
作者:Aaron C. Sather、Orion B. Berryman、Julius Rebek
DOI:10.1021/ol300303s
日期:2012.3.16
The single-step synthesis of fused tricyclic pyridazino[1,2-a]indazolium ringsystems is described. Structural details revealed by crystallography explain the unexpected reactivity. The method is applied to the gram scale synthesis of nigeglanine hydrobromide.
描述了稠合三环哒嗪并[1,2- a ]吲唑环体系的一步合成。晶体学揭示的结构细节解释了意想不到的反应性。该方法应用于氢溴酸尼加拉宁的克级合成。
Versatile synthesis of novel tetrahydroquinolines as potentially active semicarbazide-sensitive amine oxidase (SSAO) inhibitors via tert-amino effect
Several aminomethyl tetrahydroquinoline derivatives were synthesized in a facile three-step procedure, in order to develop a semicarbazide-sensitiveamineoxidase (SSAO) inhibitor library, as proved by in vitro test on rat aorta microsomal fraction. The efficient microwave-assisted cisdiastereoselective cyclization of 2-dicyanovinyl-tert-anilines is based on tert-aminoeffect as a thermal isomerization
Novel applications of the “t-amino effect” in heterocyclic chemistry. Synthesis of a pyrrolo[1,2-a]quinazoline and 5H-pyrrolo[1,2-a][3,1]benzothiazines
1-(1-Pyrrolidinyl)benzenes substituted with an imino- or an in situ generated thiocarbonyl group in the 2-position rearrange upon heating to quinazoline and benzothiazine derivatives, respectively.
The present invention is directed to 2-hydroxymethyl compounds which are antagonists of orexin receptors. The present invention is also directed to uses of the compounds described herein in the potential treatment or prevention of neurological and psychiatric disorders and diseases in which orexin receptors are involved. The present invention is also directed to pharmaceutical compositions comprising these compounds. The present invention is also directed to uses of these pharmaceutical compositions in the prevention or treatment of such diseases in which orexin receptors are involved.