Studies on angiotensin converting enzyme inhibitors. II. Syntheses and angiotensin converting enzyme inhibitory activities of carboxyethylcarbamoyl-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid derivatives.
摘要:
(3S)-2-[N-取代的N-(2-羧乙基)氨基甲酰基]-1,2,3,4-四氢异喹啉-3-羧酸衍生物(V)由(3S)-1,2缩合合成, 3, 4-四氢异喹啉-3-羧酸酯(III)、3-烷基氨基丙酸酯(II)和光气,然后裂解酯基。评价了这些二羧酸衍生物(V)的体外血管紧张素转换酶(ACE)抑制活性。其中,N-乙基(13)和N-异丙基(14)衍生物表现出较高的抑制活性,IC50值分别为1.1×10-8和7.7×10-8M。在血压正常的大鼠中口服给药后,这些化合物仅表现出对血管紧张素 I 的升压反应的弱抑制作用。因此,为了衍生口服活性抑制剂,将酯衍生物(IV、VI和VII)制备为二羧酸(V)的前药。在这些酯中,发现在侧链具有酯官能团的单酯化合物(VI)具有口服活性。特别是,(3S)-2-[N-乙基-N-(2-丁氧基羰基乙基)氨基甲酰基]-1,2,3,4-四氢异喹啉-3-羧酸(20)抑制血管紧张素I的升压反应高达口服剂量 1.0 mg/kg 时可达到 82%。
Résumé The catalyst-free reactions of activated alkenes with primary and secondary amines were investigated leading to various mono- and di-hydroamination products, the latter being rare and original. These reactions were shown to depend first on the strength of the nucleophile. Temperature and steric hindrance of the reagents were the other key factors controlling the selectivity of these aza-Michael reactions. In spite of their poor nucleophilicities, some N-heterocyclic amines could react with different activated alkenes affording valuable intermediates. Such results tended to demonstrate the hydrogen-bonding interactions between activated alkenes and poly-nitrogen aromatic cycles may control these concerted or fully conjugate aza-Michael additions. Supplementary Materials: Supplementary material for this article is supplied as a separate file: mmc1.doc
A combination of gold chloride organometallic complex and a silver salt was used to catalyze intermolecular hydroamination of activated alkenes, i.e aza-Michael reactions. The gold-catalyzed reactions of activated alkenes with nitrogen substrates were investigated and found to afford various mono- and dihydroamination products, the latter being rare and original. After flash chromatography, gold NHC
Promiscuous Behavior of Rhizomucor miehei Lipase in the Synthesis of N-Substituted β-Amino Esters
作者:Leandro N. Monsalve、Florencia Gillanders、Alicia Baldessari
DOI:10.1002/ejoc.201101624
日期:2012.2
acrylates by using lipases as catalysts is reported. Various lipases, mono- and bifunctional amines, alkyl acrylates, and reaction parameters were studied. Under the optimal conditions, Rhizomucormieheilipase showed high selectivity. It catalyzed the formation of the Michael monoadduct as the only product in high yield and purity. Moreover, when diamines were used as nucleophiles, the lipase catalyzed the
Tetrahydroisoquinoline compounds and a pharmaceutical composition thereof
申请人:Tanabe Seiyaku Co., Ltd.
公开号:US04294832A1
公开(公告)日:1981-10-13
A tetrahydroisoquinoline compound of the formula: ##STR1## wherein R.sup.1 is alkyl of one to six carbon atoms, cycloalkyl of three to six carbon atoms, allyl or propargyl, R.sup.2 is hydrogen or alkyl of one to six carbon atoms, and R.sup.3 is hydrogen, alkyl of one to six carbon atoms or benzyl. Methods for preparing the compound (I) are disclosed. The compound (I) and a pharmaceutically acceptable salt thereof are useful as a diagnostic or therapeutic agent for angiotensin-related hypertension.
Tetrahydroisoquinoline compounds, process for preparing them and pharmaceutical compositions containing them
申请人:Tanabe Seiyaku Co., Ltd.
公开号:EP0018549A2
公开(公告)日:1980-11-12
A tetrahydroisoquinoline compound of the formula:
wherein R1 is alkyl of one to six carbon atoms, cycloalkyl of threeto six carbon atoms allyl or propargyl, R2 is hydrogen or alkyl of one to six carbon atoms, and R3 is hydrogen, alkyl of one to six carbon atoms or benzyl. Methods for preparing the compound (I) are disclosed. The compound (I) and a pharmaceutically acceptable salt thereof are useful as a diagnostic or therapeutic agent for angiotensin-related hypertension.