(Z)-3-乙酰氧基甲基-4-R-3-丁烯-2-酮(R =芳基,烷基)和(Z)-3-甲基-4-R-3-丁烯-2-丁烯(R =芳基)合成并通过酿酒酵母进行还原,分别产生(R)-和(S)-4-R-3甲基丁烷-2-。这种立体化学控制策略适用于对映体过量至中度过量的(R)-和(S)-Tropional®的合成。其他(Z)-3-酰氧基甲基-4-苯基-3-丁烯-2-酮的行为与(Z)-3-乙酰氧基甲基对应物和酰化的Morita-Baylis-Hillman加合物1-乙酰氧基-2-亚甲基-1-苯基丁烷-3-酮通过三种不同的反应途径生成了带有或不带有乙酰氧基的产物混合物。除了使用全细胞的实验外,使用分离的烯还原酶的实验还表明,在生物催化级联反应中发生乙酰氧基丢失的主要途径是S N 2'型反应,而不是正式的氢加成反应。消除乙酸。最后,相关的乙基烯酮被酵母白色念珠菌对映体选择性还原,产生(R)-和(S)还原产物,取决于起始原料中乙酰氧基的存在。
KRAS G12C INHIBITORS AND METHODS OF USING THE SAME
申请人:AMGEN INC.
公开号:US20180177767A1
公开(公告)日:2018-06-28
Provided herein are KRAS G12C inhibitors, composition of the same, and methods of using the same. These inhibitors are useful for treating a number of disorders, including pancreatic, colorectal, and lung cancers.
a catalytic enamine intermediate represents a challenging, yet fundamentally important process for the synthesis of α‐chiral carbonyls. We describe herein chiral primary‐amine‐catalyzed conjugate additions of indoles to both α‐substituted acroleins and vinyl ketones. These reactions feature enamine protonation as the stereogenic step. A simple primary–tertiary vicinal diamine 1 with trifluoromethanesulfonic
effective example of asymmetric conjugate addition–protonation reactions of thiols to α-substitutedvinylketones by chiral primary amine catalysis is reported. A simple chiral primary–tertiary diamine catalyst derived from l-phenylalanine was found to promote the sulfa-Michael addition–protonation reactions with good to excellent enantioselectivity.
Highly regiocontrolled and rapid lithiation of 3-methyl-4H-5,6-dihydro-1,2-oxazine: elaboration for .alpha.-methylene ketone synthesis
作者:Ramy Lidor、Shimon Shatzmiller
DOI:10.1021/ja00409a052
日期:1981.9
[EN] KRAS G12C INHIBITORS AND METHODS OF USING THE SAME<br/>[FR] INHIBITEURS DE KRAS G12C ET LEURS PROCÉDÉS D'UTILISATION
申请人:AMGEN INC
公开号:WO2018119183A2
公开(公告)日:2018-06-28
Provided herein are KRAS G12C inhibitors, composition of the same, and methods of using the same. These inhibitors are useful for treating a number of disorders, including pancreatic, colorectal, and lung cancers.