Highly Enantioselective α Alkylation of Aldehydes with 1,3-Benzodithiolylium Tetrafluoroborate: A Formal Organocatalytic α Alkylation of Aldehydes by the Carbenium Ion
作者:Andrea Gualandi、Enrico Emer、Montse Guiteras Capdevila、Pier Giorgio Cozzi
DOI:10.1002/anie.201102562
日期:2011.8.16
A formal formyl: The organocatalytic stereoselective addition of formyl equivalents to aldehydes (see scheme) tolerates a large variety of functional groups to afford products with high enantioselectivity (92–97 % ee) and good yields (up to 95 %). The benzodithiol group can be easily removed with Raney Ni or metalated with nBuLi, thus giving access to a methyl group or to a wide range of useful intermediates
5-LIPOXYGENASE-ACTIVATING PROTEIN (FLAP) INHIBITORS
申请人:Hutchinson H. John
公开号:US20070105866A1
公开(公告)日:2007-05-10
Described herein are compounds and pharmaceutical compositions containing such compounds, which modulate the activity of 5-lipoxygenase-activating protein (FLAP). Also described herein are methods of using such FLAP modulators, alone and in combination with other compounds, for treating respiratory, cardiovascular, and other leukotriene-dependent or leukotriene mediated conditions or diseases.
HETEROCYCLIC COMPOUNDS USEFUL IN THE TREATMENT OF DISEASE
申请人:EPIGEN BIOSCIENCES, INC.
公开号:US20160024031A1
公开(公告)日:2016-01-28
Heterocyclic compounds are described that are lysophosphatidic acid receptor ligands that are useful in the treatment of lysophosphatidic acid receptor-dependent diseases and conditions, including but not limited to diseases involving fibrosis, such as fibrosis of the heart, kidney, liver and lung, and scleroderma; inflammatory diseases such as diabetic nephropathy and inflammatory bowel disease; ocular diseases such as diseases involving retinal degeneration; nerve diseases such as pruritus and pain. Non-limiting examples of those compounds include (RS)-3-Cyclopropyl-2-4-[3-methyl-4((R)-1-phenyl-ethoxycarbonylamino)-isoxazol-5-yl]-benzyloxy}-propionic acid and (R)-1-(4′-5-[1-(2-Chloro-phenyl)-ethoxycarbonylamino]-4-fluoro-pyrazol-1-yl}-2-fluoro-biphenyl-4-yl)-cyclopropanecarboxylic acid.
Described herein are compounds and pharmaceutical compositions containing such compounds, which inhibit the activity of 5-lipoxygenase (5-LO). Also described herein are methods of using such 5-LO inhibitors, alone and in combination with other compounds, for treating respiratory, cardiovascular, and other leukotriene-dependent or leukotriene mediated conditions, diseases, or disorders.
Widely Applicable Synthesis of Enantiomerically Pure Tertiary Alkyl-Containing 1-Alkanols by Zirconium-Catalyzed Asymmetric Carboalumination of Alkenes and Palladium- or Copper-Catalyzed Cross-Coupling
for the synthesis of various chiral 2‐alkyl‐1‐alkanols, especially those of feeble chirality, has been developed. It consists of zirconium‐catalyzed asymmetric carboalumination of alkenes (ZACA), lipase‐catalyzed acetylation, and palladium‐ or copper‐catalyzed cross‐coupling. By virtue of the high selectivity factor (E) associated with iodine, either (S)‐ or (R)‐enantiomer of 3‐iodo‐2‐alkyl‐1‐alkanols
已经开发了一种高对映选择性和广泛适用的方法,用于合成各种手性 2-烷基-1-烷醇,尤其是手性弱的那些。它由锆催化的烯烃不对称碳铝化(ZACA)、脂肪酶催化的乙酰化和钯或铜催化的交叉偶联组成。凭借与碘相关的高选择性因子 ( E ),通过烯丙醇的 ZACA 反应制备的 3-碘-2-烷基-1-烷醇 ( 1 ) 的( S )-或 ( R )-对映体可以易于纯化至 ≥ 99 % ee的水平通过脂肪酶催化的乙酰化。多种手性含叔烷基醇,包括那些原本难以制备的醇,现在可以通过 Pd-或 Cu 催化的(S)-1或(R)-2交叉偶联以高对映体纯度合成用于引入各种一级、二级和三级碳基团,同时保留所有碳骨架特征。这些手性含叔烷基的醇可以进一步转化为相应的酸,并完全保留立体化学。该方法的效用的合成已经在高度对映体选择性(≥99%被证明EE)和(高效合成- [R)-2-甲基-1-丁醇和(- [R ) -和(小号)-金黄酸。