Compounds and methods for inhibiting the interaction of BCL proteins with binding partners
申请人:Castro C. Alfredo
公开号:US20060025460A1
公开(公告)日:2006-02-02
One aspect of the present invention relates to heterocyclic compounds that bind to bcl proteins and inhibit Bcl function. Another aspect of the present invention relates to compositions comprising a heterocyclic compound of the invention. The present invention provides methods for treating and modulating disorders associated with hyperproliferation, such as cancer.
Dialkyl amides of L-valine, L-isoleucine, and L-tert-leucine (2) are excellent chiral auxiliaries for the construction of quaternary stereocenters at ambient temperature. Enaminoesters 3, prepared from these auxiliaries 2 and Michael donors 1, undergo a copper-catalyzed asymmetricMichaelreaction with methyl vinyl ketone (MVK, 4) to afford products 5 in 70-90% yield and 90-99% ee (enantiomeric excess)
Ring-Opening Polymerization of Lactides Catalyzed by Natural Amino-Acid Based Zinc Catalysts
作者:Donald J. Darensbourg、Osit Karroonnirun
DOI:10.1021/ic902271x
日期:2010.3.1
to be dimeric with bridging phenoxide ligands. All zinccomplexes were shown to be very effective catalysts for the ring-opening polymerization (ROP) of lactides at ambient temperature, producing polymers with controlled and narrow molecular weight distributions. These enantiomerically pure zinccomplexes did not show selectivity toward either l- or d-lactide, that is, kd(obsd)/kl(obsd) ≈ 1. However
使一系列源自天然氨基酸的手性NNO-三齿Schiff碱配体与锌(双-三甲基甲硅烷基酰胺)2反应,以提供已充分表征的金属配合物。这些衍生物之一进一步与对氟苯酚反应,生成酚盐配合物。X射线晶体学研究表明锌席夫碱酰胺络合物是单体,而对位氟酚盐配合物显示为具有桥接酚盐配体的二聚体。已显示所有锌络合物都是在环境温度下丙交酯开环聚合(ROP)的非常有效的催化剂,可生产分子量分布受控且较窄的聚合物。这些对映体纯的锌络合物对l-或d-丙交酯均没有选择性,即k d( obsd )/ k l(obsd) ≈1。但是,席夫碱配体上的空间取代基显示出对中度至极好的立体控制。外消旋-丙交酯的ROP 。异规聚丙交酯由具有P r的rac-丙交酯生成取决于所使用的催化剂和反应温度,该值在0.68至0.89的范围内。席夫碱配体上的取代基极大地影响了各种催化剂的反应性,而体积较大的取代基的速率得到了提高。
Doubly stereocontrolled asymmetric conjugate addition of acetylacetone to nitroolefins catalyzed by bifunctional tertiary amine–thiourea catalysts derived from both acyclic α-amino acids and carbohydrates
preparative, cheap, and fine-tunable bifunctional chiral tertiary amine–thiourea organocatalysts have been developed by combining both acyclic diamines derived from acyclic α-amino acids and carbohydrates. These organocatalysts promoted the enantioselective conjugate addition of acetylacetone to various nitroolefins in good yields (up to 93%) with good enantioselectivities (up to 91% ee). The present research
chiral tertiary amine thioureas derived from both α-amino acids and carbohydrates were developed. These organocatalysts promoted the enantioselectiveconjugateaddition of acetylacetone to various aromatic and aliphatic nitroolefins at room temperature in good yields (up to 93 %) and with good enantioselectivity (up to 90 % ee). Furthermore, an interesting matched–mismatched effect of two different