The Michael addition of 1,2-cyclohexanedione to β-nitrostyrenes (I): the synthesis of 3-aryl-5,6-dihydrobenzofuran-7(4H)-ones
作者:Chad M. Simpkins、David A. Hunt
DOI:10.1016/j.tetlet.2013.04.053
日期:2013.6
the formation of 3-aryl-5,6-dihydrobenzofuran-7(4H)-ones in good yields. A putative reaction mechanism involves an initial Michaeladdition of the dione C-enolate to the β-nitro-styrene, followed by intramolecular cyclization of the resulting O-enolate anion, elimination of nitrite ion, and air oxidation. Product formation is highly dependent on base stoichiometry.
使用K 2 CO 3作为碱,β-硝基苯乙烯与1,2-环己二酮的反应可形成高产率的3-芳基-5,6-二氢苯并呋喃-7(4 H)-。推定的反应机理包括将二酮C-烯酸酯最初迈克尔加成到β-硝基苯乙烯中,然后将所得的O-烯酸酯阴离子进行分子内环化,消除亚硝酸根离子和空气氧化。产物的形成高度依赖于基本化学计量。
Indolo[2,1-a]isoquinolines. Syntheses, steroid hormone receptor binding affinities, and cytostatic activity
作者:Reinhard Ambros、Martin R. Schneider、Silvia Von Angerer
DOI:10.1021/jm00163a026
日期:1990.1
6-dihydroindolo[2,1-a]isoquinolines were synthesized and tested for binding affinity for steroid hormone receptors. All of the derivatives bind to the estrogenreceptor with RBA values ranging from 1.5 to 17 (17 beta-estradiol = 100). Some of them show binding affinities for the androgen receptor as well. In the mouse uterine weight test, the tetracycles proved to be weak estrogens with partial antagonistic