First Total Syntheses of (.+-.)-Isopiline, (.+-.)-Preocoteine, (.+-.)-Oureguattidine and (.+-.)-3-Methoxynordomesticine and the Biological Activities of (.+-.)-3-Methoxynordomesticine
作者:Surachai Nimgirawath、Phansuang Udomputtimekakul、Thongchai Taechowisan、Asawin Wanbanjob、Yuemao Shen
DOI:10.1248/cpb.57.368
日期:——
convenient and economical synthesis of 4-hydroxy-2,3-dimethoxybenzaldehyde has been developed. This was used as the starting material for the first total syntheses of (+/-)-isopiline, (+/-)-preocoteine, (+/-)-oureguattidine and (+/-)-3-methoxynordomesticine in which the key step involved formation of ring C of the aporphines by a radical-initiated cyclisation. Although (+/-)-3-methoxynordomesticine
已经开发了方便且经济的4-羟基-2,3-二甲氧基苯甲醛的合成。将其用作(+/-)-异脯氨酸,(+/-)-preocoteine,(+/-)-尿瓜定和(+/-)-3-甲氧基正十二烷的第一批总合成的原料,其中关键该步骤涉及通过自由基引发的环化作用形成的Aphiphines的C环。虽然(+/-)-3-甲氧基降血压药具有弱的抗菌活性,但它抑制一氧化氮(NO),前列腺素(PG)E(2),肿瘤坏死因子(TNF)-α,白介素(IL)-1的产生β和IL-6以及LPS刺激的巨噬细胞中诱导型一氧化氮合酶(iNOS)和环氧合酶(COX)-2的表达。