A magnesium-catalyzed regiodivergent C–Obond cleavage protocol is presented. Readily available magnesium catalysts achieve the selective hydroboration of a wide range of epoxides and oxetanes yielding secondary and tertiary alcohols in excellent yields and regioselectivities. Experimental mechanistic investigations and DFT calculations provide insight into the unexpected regiodivergence and explain
Visible-Light-Mediated Anti-Markovnikov Hydration of Olefins
作者:Xia Hu、Guoting Zhang、Faxiang Bu、Aiwen Lei
DOI:10.1021/acscatal.6b03388
日期:2017.2.3
avoided the need for a transition-metal catalyst, stoichiometric borane, as well as oxidant. Both terminal and internal olefins are readily accommodated in this transformation to obtain corresponding primary and secondary alcohols in good yields with single regioselectivity. This procedure can be scaled up to gram scale with a 230 turnover number based on photocatalyst.
CLASS OF BIFUNCTIONAL COMPOUNDS WITH QUATERNARY AMMONIUM SALT STRUCTURE
申请人:Beijing Showby Pharmaceutical Co., Ltd.
公开号:EP3556435A1
公开(公告)日:2019-10-23
The invention provides a class of compounds represented by formula (I), having bifunctional active quaternary ammonium salt structure of a β2-adrenoreceptor agonist and an M receptor antagonist, a pharmaceutically acceptable salt, solvate, and optical isomer thereof. A pharmaceutical composition comprising such a compound with quaternary ammonium salt structure, a method for preparing such a compound with quaternary ammonium salt structure and an intermediate thereof, and uses thereof in treating pulmonary disorders are also provided. The compounds of the invention have high selectivity to the M receptor subtype, and have less adverse reaction and lower toxic and side effects in the treatment of pulmonary diseases such as COPD and asthma.
本发明提供了一类由式(I)代表的化合物,其具有β2-肾上腺素受体激动剂和M受体拮抗剂的双功能活性季铵盐结构,以及其药学上可接受的盐、溶液和光学异构体。本发明还提供了包含这种具有季铵盐结构的化合物的药物组合物、制备这种具有季铵盐结构的化合物及其中间体的方法,以及其在治疗肺部疾病中的用途。本发明的化合物对 M 受体亚型具有高选择性,在治疗慢性阻塞性肺病和哮喘等肺部疾病时不良反应小,毒副作用低。
Muskatirovic,M.; Krstic,V., Justus Liebigs Annalen der Chemie, 1976, p. 1964 - 1971
作者:Muskatirovic,M.、Krstic,V.
DOI:——
日期:——
[EN] SELECTIVE PDE3B INHIBITORS AND USE OF THE SAME IN THERAPY<br/>[FR] INHIBITEURS SELECTIFS DE PDE3B ET LEURS UTILISATIONS THERAPEUTIQUES
申请人:ICOS CORP
公开号:WO2002070469A2
公开(公告)日:2002-09-12
Selective PDE3B inhibitors, including compounds of the general structural formula (I), and use of the selective PDE3B inhibitors and salts and solvates thereof as therapeutic agents, are disclosed.