α-Amination of Nitrogen Heterocycles: Ring-Fused Aminals
摘要:
Aromatic aminoaldehydes react with cyclic amines to produce ring-fused aminals under thermal conditions. This process applied to two-step syntheses of the quinazolinone alkaloids deoxyvasicinone and rutaecarpine.
[EN] GROUP OF TETRAHYDROINDOLOQUINAZOLINE COMPOUNDS AND USE THEREOF<br/>[FR] GROUPE DE COMPOSÉS DE TÉTRAHYDROINDOLOQUINAZOLINE ET LEUR UTILISATION<br/>[ZH] 一组四氢吲哚并喹唑啉类化合物及其应用
Rutaecarpine is the major alkaloid component of Wu-Chu-Yu, a well known Chinese herbal drug. It has been reported that rutaecarpine causes the vasodilator, hypotensive effects by stimulation of CGRP synthesis and release via activation of TRPV1. In present study, 23 rutaecarpine analogues were designed and synthesized. Then, the vasodilator effects of theses compounds were screened by rat aortic ring experiment. The result showed that the 14-N atom of rutaecarpine might be the key site for the activity. The 5-carbonyl might make lower contribution to the effect. And simple substitute in indole-ring or quinazo-line-ring would not enhance the vasodilator effect unless in proper position with proper group. One of these compounds, 10-methylrutaecarpine, exhibited similar effect with rutaecarpine. Further functional experiments showed its vasodilator and hypotensive effect were related to the stimulation of CGRP release via activation of TRPV1. The vasodilator effects of these compounds were evaluated and the structure-activity relationship was elucidated for the first time. The results suggested a new direction of valuable TRPV1 agonist as anti-hypertensive drugs. (C) 2009 Elsevier Ltd. All rights reserved.
Facile Access to Ring-Fused Aminals via Direct α-Amination of Secondary Amines with o-Aminobenzaldehydes: Synthesis of Vasicine, Deoxyvasicine, Deoxyvasicinone, Mackinazolinone, and Ruteacarpine
Secondary amines undergo redox-neutral reactions with aminobenzaldehydes under conventional and microwave heating to furnish polycyclic aminals via amine alpha-amination/N-alkylation. This unique alpha-functionalization reaction proceeds without the involvement of transition metals or other additives. The resulting aminal products are precursors for various quinazolinone alkaloids and their analogues.
GROUP OF TETRAHYDROINDOLOQUINAZOLINE COMPOUNDS AND USE THEREOF
申请人:INSTITUTE OF MEDICINAL BIOTECHNOLOGY CHINESE ACADEMY OF MEDICAL SCIENCES
公开号:US20220402918A1
公开(公告)日:2022-12-22
The disclosure relates to an indolo[2′,3′:3,4]pyrido[2,1-b]quinazoline compound represented by general formula (I) and use thereof in the manufacture of (1) a medicament for treating a cardiovascular and cerebrovascular disease, (2) a formulation for increasing expression of AMPK, ABCA1 and SR-BI, (3) a formulation for activating nuclear receptors (NRs), and inhibiting activity of NLRP3, IL-1β, NF-κB and MAPKs, (4) a formulation for promoting cellular cholesterol efflux; or (5) a medicament for anti-inflammation.