Improved synthesis of mestranol and ethinyl estradiol (EE) related degradation products as authentic references
摘要:
Preparative chemical methods for the synthesis of 10 degradation or photodecomposition products of mestranol and ethinyl estradiol (EE) are described. The synthesized compounds are useful as reference materials and standards for pharmaceutical analysis of mestranol and EE as bulk chemical or in formulated product. New synthetic methods were presented and the known synthetic procedures were improved. Detailed structural characterization of the degradation or photodecomposition products of mestranol and EE and related compounds was reported. (C) 2007 Elsevier Inc. All rights reserved.
Analogs of [(triethylsilyl)ethynyl]estradiol as potential antifertility agents
作者:Richard H. Peters、David F. Crowe、Mitchell A. Avery、Wesley K. M. Chong、Masato Tanabe
DOI:10.1021/jm00398a014
日期:1988.3
detail and the oral antifertility and oral estrogenic potencies of the compounds are described and compared. Of the various triethylsilyl compounds examined for an antifertility to estrogenic activity ration that would be more beneficial than that of a present agent, only 23 manifested the desired ratio. Compound 18, which was 66% as effective as ethynyl estradiol as an antifertilityagent, had 0.1% of the
General Approach to <i>N</i><sup>6</sup>,C5′-Difunctionalization of Adenosine
作者:Dellamol Sebastian、Sakilam Satishkumar、Padmanava Pradhan、Lijia Yang、Mahesh K. Lakshman
DOI:10.1021/acs.joc.1c01587
日期:2022.1.7
group from 2′,3′,5′-tri-O-(t-BuMe2Si)-protected N6-alkyl adenosine derivatives and from 6-ClP-riboside was readily achieved. Reactions of the 5′-deprotected 6-ClP-riboside with alkyl amines proceeded in high yields and under mild conditions. Because these complementary methodologies yielded N6-aryl and -alkyl adenosine derivatives containing a free 5′-hydroxyl group, a variety of product functionalizations
在 C6-卤代嘌呤核糖核苷中,已知容易获得的 6-氯衍生物与胺,特别是芳基胺发生缓慢的 S N Ar 反应。在这项工作中,我们表明在 EtOH 中的 0.1 M AcOH 中,芳胺在 2',3',5'-三-O -( t -BuMe 2 Si)-保护的 6-氯嘌呤的 C6 位上非常有效地反应核苷(6-ClP-核苷),伴随着 5'-甲硅烷基的裂解。这些两步法通常以良好的收率进行,值得注意的是,在没有 AcOH 的情况下,反应要慢得多和/或收率较低。2',3',5'- tri- O -( t -BuMe 2的相应反应Si)-保护的 6-ClP-核苷与烷基胺进行得很好,但在伯羟基末端没有去甲硅烷基化。这些差异可能是由于在这些反应中形成的氯化铵的酸性,AcOH 的作用不是去甲硅烷基化,而可能只是嘌呤活化。在 0 °C 下,在 THF 中加入 50% 的 TFA 水溶液,从 2',3',5'-三-O -(
System for providing birth control
申请人:The Population Council, Inc.
公开号:US10940157B2
公开(公告)日:2021-03-09
The present disclosure relates to a vaginal system that prevents pregnancy comprised of segesterone acetate and ethinyl estradiol and is configured for thirteen 28-day product-use cycles.
本公开涉及一种阴道避孕系统,由醋酸雌二醇炔孕酮和炔雌醇组成,产品使用周期为 13 个 28 天。
JOUQUEY, A.;PIERDET, A.
作者:JOUQUEY, A.、PIERDET, A.
DOI:——
日期:——
SYSTEM FOR PROVIDING BIRTH CONTROL
申请人:The Population Council, Inc.
公开号:US20200397800A1
公开(公告)日:2020-12-24
The present disclosure relates to a vaginal system that prevents pregnancy comprised of segesterone acetate and ethinyl estradiol and is configured for thirteen 28-day product-use cycles.