Trimethylsilyl trifltate catalyzed aldol-type reaction of enol silyl ethers and acetals or related compounds
作者:Shizuaki Murata、Masaaki Suzuki、Ryoji Noyori
DOI:10.1016/s0040-4020(01)86671-0
日期:1988.1
condensation of enol trimethylsllyl ethers with acetals, orthoformate, or 2-acetoxytetrahydrofuran or -pyrans to give the corresponding β-alkoxy carbonylcompounds. Reaction of enolsilylethers and carboxonium triflate ion-pair intermediates occurs via acyclic transition states and exhibits moderate to high erythro selectivity independent of the geometry (E/Z) of the enolsilylethers.
Strategic use of oxophilic (hard) gold(III) and π-philic (soft) gold(I) catalysts provides access to two types of cyclic ethers from propargylic alcohols. Thus, heating propargylic alcohols with an oxophilic gold(III) catalyst (AuBr3) results in cyclization to afford cyclic ethers bearing an acetylenic moiety, due to coordination of gold(III) to the oxygen of the propargylic hydroxyl group. On the
Condensation of enol silyl ethers with 2-acetoxytetrahydrofuran and -tetrahydropyrans
作者:S. Murata、R. Nayori
DOI:10.1016/s0040-4039(00)87406-7
日期:1982.1
Trimethylsilyltrifluoromethanesulfonatecatalyzesstereoselectivecondensation of enolsilylethers and 2-acetoxytetrahydrofuran or -tetrahydropyran derivatives.
Treprostinil derivatives and compositions and uses thereof
申请人:CORSAIR PHARMA, INC.
公开号:US10246403B2
公开(公告)日:2019-04-02
The present disclosure provides treprostinil derivatives that can act as prodrugs of treprostinil. The treprostinil derivatives can be used to treat any conditions responsive to treatment with treprostinil, including pulmonary hypertension, such as pulmonary arterial hypertension.