Bislactonizations of olefinic diacids with [hydroxy(tosyloxy)iodo]benzene
作者:Mayur Shah、Michael J. Taschner、Gerald F. Koser、Nancy L. Rach、Thomas E. Jenkins、Patrick Cyr、David Powers
DOI:10.1016/s0040-4039(00)85231-4
日期:1986.1
The reactions of [hydroxy(tosyloxy)iodo]benzene with a series of olefinic diacids to produce bislactones are reported. The products are the result of a stereospecific -addition of the two carboxylic acid functions to the double bond.
Bislactonization of unsaturated diacids using lead tetraacetate
作者:E.J. Corey、Andrew W. Gross
DOI:10.1016/s0040-4039(00)92788-6
日期:1980.1
The reaction of leadtetraacetate with unsaturated carboxylic acids (or salts) to from bislactones (γ or δ) can be controlled to produce efficiently addition of two carboxylic oxygens to the double bond, in consonance with an initial plumbolactonization step followed by SN2 displacement of lead.
可以控制四乙酸铅与不饱和羧酸(或盐)反应生成双内酯(γ或δ)的反应,从而有效地将两个羧酸氧加成至双键中,同时进行初始的铅碳磺化步骤,随后进行S N 2置换铅。
Manufacturing process for enantiomerically pure 8-Aryloctanoic acids as Aliskiren
申请人:Soukup Milan
公开号:US20110105767A1
公开(公告)日:2011-05-05
The invention describes a novel technical process and novel intermediates useful for the manufacture of enantiomerically pure 8-aryloctanoic acids of the formula I which are pharmaceutically active compounds as rennin inhibitors.
Desymmetrization of a Centrosymmetric Diepoxide: Efficient Synthesis of a Key Intermediate in a Total Synthesis of Hemibrevetoxin B
作者:Joanne M. Holland、Mark Lewis、Adam Nelson
DOI:10.1021/jo026456b
日期:2003.2.1
The preparation of an established intermediate in a totalsynthesis of hemibrevetoxinB is described. The acid-catalyzed cyclization of trans-4,5-epoxyoctane-2,7-dione exhibited a valuable mixture of kinetic and thermodynamic control: stereospecific epoxide opening was followed by equilibration of the products to provide the required trans-fused octahydropyrano[3,2-b]pyran ring system. Two-directional
Stereoselective synthesis of the 2,6-disubstituted tetrahydropyran-3-ol of the potent antitumor agent mucocin via an acyl radical cyclization
作者:P.Andrew Evans、Jamie D. Roseman
DOI:10.1016/s0040-4039(97)01147-7
日期:1997.7
radical cyclization of the acyl selenide 8, using a Z-vinylogous sulfonate to control rotamer population, affords the cis-2,6-disubstituted tetrahydropyran-4-one 9, applicable to the potent antitumoragentmucocin 1, in 81% yield.