Etodolic acid and related compounds. Chemistry and antiinflammatory actions of some potent di- and trisubstituted 1,3,4,9-tetrahydropyrano[3,4-b]indole-1-acetic acids
作者:Christopher A. Demerson、Leslie G. Humber、Adolph H. Philipp、Rene R. Martel
DOI:10.1021/jm00225a010
日期:1976.3
4-b]indole-1-acetic acids bearing one, or two, substituents on the benzene ring has been synthesized via the acid-catalyzed condensation of a substituted tryptophol with ethyl propionylacetate or ethyl butyrylacetate. Antiinflammatory and ulcerogenic effects were examined and the results show that 1, 8-diethyl-1, 3, 4, 9-tetrahydropyrano[3, 4-b]indole-1-acetic acid (etodolic acid, USAN) is a potent agent, particularly
一系列在苯环上带有一个或两个取代基的37种1-乙基和1-n-丙基-1,3,4,9-四氢吡喃[3,4-b]吲哚-1-乙酸通过取代的色酚与丙酸乙酯或丁酸乙酯的酸催化缩合反应合成。检查了抗炎和促溃疡作用,结果表明1、8-二乙基-1、3、4、9-四氢吡喃并[3,4-b]吲哚-1-乙酸(依托度酸,USAN)是有效的药物,在慢性大鼠炎症模型(佐剂性关节炎模型中,ED50 0.7 + 1-0.1 mg / kg po)特别有效,并且在同一物种中具有相对较低的急性致溃疡性。
Photochemical α-carboxyalkylation of tryptophols and tryptamines <i>via</i> C–H functionalization
strategy activated the C-Br bonds of α-bromo-alkylcarboxylic esters to provide carbon-centered radicals under the catalysis of Ir(iii) photocatalyst and coupled with indole derivatives. This methodology displayed wide functional group tolerance and excellent regioselectivity, and was applied to the late-stage functionalization and preparation of indole-containing hybrids.
Aqueous Titanium Trichloride Promoted Reductive Cyclization of
<i>o</i>
‐Nitrostyrenes to Indoles: Development and Application to the Synthesis of Rizatriptan and Aspidospermidine
TiCl3 solution at room temperature afforded indoles through a formal reductive C(sp2)–H amination process. A range of functions such as halides (Cl, Br), carbonyl (ester, carbamate), cyano, hydroxy, and amino groups were tolerated. From β,β‐disubstituted o‐nitrostyrenes, 2,3‐disubstituted indoles were formed by a domino reduction/cyclization/migration process. Mild conditions, simple experimental procedure
Stereospecific access to bridged [n.2.1] skeletons through gold-catalyzed tandem reaction of indolyl homopropargyl amides
作者:Tong-De Tan、Xin-Qi Zhu、Mei Jia、Yongjia Lin、Jun Cheng、Yuanzhi Xia、Long-Wu Ye
DOI:10.1016/j.cclet.2019.10.019
日期:2020.5
cycloisomerization-initiated tandem reaction of Boc-protected indole tethered homopropargyl amides has been achieved. This method delivers a wide range of valuable bridged aza-[n.2.1] skeletons (n = 3–7) at roomtemperature with high diastereoselectivity and enantioselectivity by a chirality-transfer strategy. Moreover, the gold-catalyzed tandem reaction of homopropargyl alcohol is also achieved to produce
The present study reports an asymmetric organocatalytic cascade reaction of oxindole derivates with α,β-unsaturated aldehydes efficiently catalyzed by simple chiralsecondaryamine. Spirooxindole-fused cyclopentanes were produced in excellent isolated yields (up to 98%) with excellent enantiopurities (up to 99% ee) and moderate to high diastereoselectivities. The synthetic utility of the protocol was