Regioselectivity in the intramolecularHeckreaction of a series of N‐sulfonyl‐2,5‐dihydro‐3‐substituted pyrroles was studied. These substrates are unbiased in terms of the formed ring size of the new heterocycle. Results indicate that high levels of regioselectivity are observed under a range of conditions, and that there is an underlying propensity for carbon–carbon bond formation at the most hindered
研究了一系列N-磺酰基-2,5-二氢-3-取代吡咯在分子内Heck反应中的区域选择性。这些衬底在新杂环形成的环尺寸方面没有偏见。结果表明,在一定条件下观察到了很高的区域选择性,并且在烯烃最受阻的末端存在潜在的碳-碳键形成趋势。对于两个示例(3 Me和3 t Bu),进行了DFT计算,结果表明,在这两种情况下,对于碳酸盐的建模过渡态,对于实验上优选的异构体,在能量上都较低。
Propane-1,3-Dione Derivative or Salt Thereof
申请人:Hirano Masaaki
公开号:US20090181964A1
公开(公告)日:2009-07-16
It is intended to provide a compound useful as a GnRH receptor antagonist. The inventors further investigated propane-1,3-dione derivatives. As a result, they confirmed that a compound having a benzene ring or a thiophene ring substituted with a group represented by —SO
2
—R
3
in a propane-1,3-dione derivative having 2-(1,3-dihydro-2H-benzimidazol-2-ylidene) has an excellent GnRH receptor antagonistic effect and accomplished the present invention. Because the compound of the present invention has a potent GnRH receptor antagonistic effect, it is useful for the treatment of sex hormone-dependent diseases, particularly GnRH-related diseases. Further, because the compound of the present invention has an excellent metabolic stability in human and few drug interactions, therefore it has preferable characteristics as a pharmaceutical used for the above-mentioned diseases.