Homoallylic chiral induction in the synthesis of 2,4-disubstituted tetrahydrofurans by iodoetherification. Synthetic scope and chiral induction mechanism
Preparation of ethyl 5(s),6-epoxy-3(r)-(methoxymethoxy)hexanoate: a key chiral intermediate for mevinolin and compactin.
作者:Yvan Guindon、Christiane Yoakim、Michael A. Bernstein、Howard E. Morton
DOI:10.1016/s0040-4039(00)98429-6
日期:1985.1
The synthesis of Ethyl 5(S),6-Epoxy-3(R)-(methoxymethoxy)hexanoate, a key chiral synthon for the β-hydroxy-δ-lactone portion of Mevinolin and Compactin, via a regiospecific ring opening of a tetrahydrofuran derivative by dimethylboron bromide, is described.
[EN] VITAMIN D3 DERIVATIVES AND PHARMACEUTICAL USE THEREOF<br/>[FR] DÉRIVÉS DE LA VITAMINE D3 ET LEUR UTILISATION PHARMACEUTIQUE
申请人:UNIV KYOTO
公开号:WO2016103722A1
公开(公告)日:2016-06-30
The present invention relates to vitamin D3 derivatives of the following formula, wherein each symbol has the same meaning as defined herein, and pharmaceutical or medical use thereof for treating metabolic disease, liver disease, obesity, diabetes, cardiovascular disease, or cancer in a patient in need thereof.
A simple and efficient synthesis of (+)-benzoylpedamide, the right half of pederin, was achieved in 16 steps with a 35% overall yield from (S)-malic acid. The key steps include the SmI2-mediated intramolecular Reformatsky reaction, stereoselective allylation, the Sharpless asymmetricdihydroxylation, and amidation. The totalsynthesis of pederin was accomplished via coupling of the left and right halves
Studies on the total synthesis of macrolactin A. A stereoselective synthesis of the C3–C13 and C14–C24 fragments
作者:Shukun Li、Rui Xu、Donglu Bai
DOI:10.1016/s0040-4039(00)00412-3
日期:2000.4
Synthetic studies towards the C3–C13 (2) and C14–C24 (3) segments of the potent antiviral and antitumor compound macrolactin A (1) are presented. Segment 2 was constructed via a convergent and facile approach, exploiting Wittig olefination to generate the sensitive E,Z-diene moiety. Segment 3 was obtained from the chiral pool derived sulfone 4 via an α-alkylation–desulfonation reaction sequence.