我们最近报道,外消旋5,11-顺二乙基-5,6,11,12-四氢丙烯-2,8-二醇(THC,rac-2b)充当雌激素受体α(ERalpha)的激动剂和雌激素受体β(ERbeta)的完全拮抗剂(Sun et al。Endocrinology 1999,140,800-804)。为了进一步研究这种新颖的ER亚型选择性雌激素活性,我们合成了一系列顺式和反式二烷基四氢大麻酚。通过对映体纯的α-烷基-β-芳基丙酸酯的酰基糊精缩合,然后在温度下,在路易斯酸介导的双环化下,以高度对映和非对映选择性的方式制备顺式-二甲基,-二乙基和-二丙基THC 2a-c。最小差向异构的条件。ERalpha和ERbeta的顺式和反式异构体的二甲基,二乙基,在竞争性结合试验中测定了二丙基四氢大麻酚的含量,在哺乳动物细胞中通过报道基因测定了它们的转录活性。发现几乎所有检查的THC对ERbeta都具有亲和力。所有这些THC都是
我们最近报道,外消旋5,11-顺二乙基-5,6,11,12-四氢丙烯-2,8-二醇(THC,rac-2b)充当雌激素受体α(ERalpha)的激动剂和雌激素受体β(ERbeta)的完全拮抗剂(Sun et al。Endocrinology 1999,140,800-804)。为了进一步研究这种新颖的ER亚型选择性雌激素活性,我们合成了一系列顺式和反式二烷基四氢大麻酚。通过对映体纯的α-烷基-β-芳基丙酸酯的酰基糊精缩合,然后在温度下,在路易斯酸介导的双环化下,以高度对映和非对映选择性的方式制备顺式-二甲基,-二乙基和-二丙基THC 2a-c。最小差向异构的条件。ERalpha和ERbeta的顺式和反式异构体的二甲基,二乙基,在竞争性结合试验中测定了二丙基四氢大麻酚的含量,在哺乳动物细胞中通过报道基因测定了它们的转录活性。发现几乎所有检查的THC对ERbeta都具有亲和力。所有这些THC都是
A novel class of N-aryl-2-acylindole human glucagon receptor (hGCGR) antagonists is reported. These compounds demonstrate good pharmacokinetic profiles in multiple preclinical species. One compound from this series, indole 33, is orally active in a transgenic murine pharmacodynamic model. Furthermore, a 1 mg/kg oral dose of indole 33 lowers ambient glucose levels in an ob/ob/hGCGR transgenic murine diabetes model. This compound was deemed suitable for preclinical safety studies and was found to be well tolerated in an 8-day experimental rodent tolerability study. The combination of preclinical efficacy and safety observed with compound 33 highlights the potential of this class as a treatment for type 2 diabetes. (C) 2011 Elsevier Ltd. All rights reserved.
New Chiral Synthons for Efficient Introduction of Bispropionates via Stereospecific Oxonia−Cope Rearrangements
作者:Yi-Hung Chen、Frank E. McDonald
DOI:10.1021/ja061082f
日期:2006.4.1
Compounds 1 and 2 are novel synthons for bispropionate synthesis, undergoing stereospecific Lewis acid-catalyzed transfer of the bispropionate unit with a variety of aldehydes, including alpha-chiral aldehydes. Thus 1 leads to the E-alkene bispropionate 3 with anti-stereochemistry, whereas diastereomer 2 gives the Z-alkene product 4, under mild conditions and with complete stereospecificity. The efficacy of this methodology is demonstrated in a short synthesis of invictolide beginning with 2 and (R)-2-methylpentanal.
Estrogen Receptor Subtype-Selective Ligands: Asymmetric Synthesis and Biological Evaluation of <i>cis</i>- and <i>trans</i>-5,11-Dialkyl- 5,6,11,12-tetrahydrochrysenes
作者:Marvin J. Meyers、Jun Sun、Kathryn E. Carlson、Benita S. Katzenellenbogen、John A. Katzenellenbogen
DOI:10.1021/jm990101b
日期:1999.7.1
activity, we have synthesized a series of cis- and trans-dialkyl THCs. cis-Dimethyl, -diethyl, and -dipropyl THCs 2a-c were prepared in a highly enantio- and diastereoselective manner by the acyloin condensation of enantiomerically pure alpha-alkyl-beta-arylpropionic esters, followed by a Lewis acid-mediated double cyclization under conditions of minimal epimerization. ERalpha and ERbeta binding affinity
我们最近报道,外消旋5,11-顺二乙基-5,6,11,12-四氢丙烯-2,8-二醇(THC,rac-2b)充当雌激素受体α(ERalpha)的激动剂和雌激素受体β(ERbeta)的完全拮抗剂(Sun et al。Endocrinology 1999,140,800-804)。为了进一步研究这种新颖的ER亚型选择性雌激素活性,我们合成了一系列顺式和反式二烷基四氢大麻酚。通过对映体纯的α-烷基-β-芳基丙酸酯的酰基糊精缩合,然后在温度下,在路易斯酸介导的双环化下,以高度对映和非对映选择性的方式制备顺式-二甲基,-二乙基和-二丙基THC 2a-c。最小差向异构的条件。ERalpha和ERbeta的顺式和反式异构体的二甲基,二乙基,在竞争性结合试验中测定了二丙基四氢大麻酚的含量,在哺乳动物细胞中通过报道基因测定了它们的转录活性。发现几乎所有检查的THC对ERbeta都具有亲和力。所有这些THC都是