Cyanomidines. I. Synthesis and Vasodilatory Activity of N-Substituted Heteroaromatic Cyanoamidines.
摘要:
各种异芳香氰基脲被合成,起始材料为腈,经过氰基咪唑或从酰胺经过硫酰胺。对这些化合物进行了抑制实验,以测试它们对40 mM K+诱导的大鼠主动脉条收缩的影响,同时还评估了选定化合物对去甲肾上腺素诱导的收缩的拮抗作用。大多数氰基脲表现出血管扩张活性。还对强效血管活性化合物进行了86Rb+外流的刺激实验,以确定它们的钾通道开放作用。N-氰基-N'-(2-硝氧基乙基)-3-吡啶羧基脲(3h)显示出最大的效力。3h的甲烷磺酸盐,命名为KRN2391,被选中进一步开发作为抗心绞痛药物。
Regioselective reductive transamination of peptidic amides enabled by a dual Zr(IV)–H catalysis
作者:Jian-Tao Tang、Yu Gan、Xuejiao Li、Baihua Ye
DOI:10.1016/j.chempr.2022.11.002
日期:2022.12
is a common structural motif of peptides and biologically active molecules, is a highly attractive target for catalytic transformations. Despite its high synthetic potential, the chemical inertness of the amide bond, owing to its resonance stabilization, has rendered this approach challenging. Existing catalytic modes essentially include metal-catalyzed carbon–nitrogen bond activation, transamidation
Various heteroaromatic cyanoamidines were synthesized starting from nitriles via cyanoimidates or from amides via thioamides. The compounds were tested for inhibitory effect on the 40 mM K+-induced contraction of rat aorta strips and selected compounds were also evaluated for antagonism of the norepinephrine-induced contraction. Most of the cyanoamidines showed vasodilatory activities. Potent vasoactive compounds were also examined for stimulation of the 86Rb+ efflux to determine their potassium channel opening actions. Maximum potency was displayed by N-cyano-N'-(2-nitroxyethyl)-3-pyridinecarboxyamidine (3h). The methanesulfonate of 3h, which was designated as KRN2391, has been selected for further development as an antianginal agent.
各种异芳香氰基脲被合成,起始材料为腈,经过氰基咪唑或从酰胺经过硫酰胺。对这些化合物进行了抑制实验,以测试它们对40 mM K+诱导的大鼠主动脉条收缩的影响,同时还评估了选定化合物对去甲肾上腺素诱导的收缩的拮抗作用。大多数氰基脲表现出血管扩张活性。还对强效血管活性化合物进行了86Rb+外流的刺激实验,以确定它们的钾通道开放作用。N-氰基-N'-(2-硝氧基乙基)-3-吡啶羧基脲(3h)显示出最大的效力。3h的甲烷磺酸盐,命名为KRN2391,被选中进一步开发作为抗心绞痛药物。