亚磷酸二乙酯与[(Me 3 Si)2 N] 3 RE(μ-Cl)Li(THF)3(RE = Sc(1),Y(2), La(3),Yb(4)和Lu(5))与H 2 L n((S)-2,4-R 2 -6-[[[((2-羟基二苯基甲基)吡咯烷-1-基]甲基]苯酚)(R = t Bu(H 2 L 1); R = 1-枯基(H 2 L 2)和R = 1-adm(H 2 L 3))被披露。测试了不同的中心金属和配体对加成反应的影响,发现Sc配合物1和配体H 2 L 2的结合效果最好。使用相对较宽的不饱和酰胺范围,可获得优异的化学收率(高达99%)和良好至高的对映选择性(从73%到89%不等)。还讨论了当前系统中的活跃物种。
which is performed under atmospheric pressure of CO in the absence of acids, has been developed. Palladium hydride (Pd-H) generated from triethylsilane (Et3SiH) rather than the traditionally used strong acid (HX) is applied for the first time in this transformation. In addition, an unusual counteranion-controlled linear and branch selectivity for terminal alkynes is observed under otherwise identical
已经开发出一种用于炔烃烃基化的超温和反应条件,该反应条件是在 CO 大气压下在不存在酸的情况下进行的。由三乙基硅烷 (Et 3 SiH) 而不是传统上使用的强酸 (HX)生成的氢化钯 (Pd-H)首次应用于该转化中。此外,在其他相同条件下观察到不寻常的抗衡阴离子控制的末端炔烃的线性和支化选择性。广泛的 1,1-、1,2- 和 1,2,2-取代的 α,β-不饱和硫酯或酰胺可以区域选择性地从末端和内部炔烃中以中等到极好的收率获得。此外,当使用 2-(叔-丁基)- N -(2-炔基苯基)苯胺作为底物,在 TMS-SYNPHOS 作为手性配体存在下。
Kim, Tae-Hyoung; Huh, Chul; Lee, Bon-Su, Journal of the Chemical Society. Perkin transactions II, 1995, # 12, p. 2257 - 2262
Four series of acidamides were synthesized, and through measurement using a fluorogenic substrate assay with human recombinant MMP-1, MMP-2 and MMP-9, compound 3f showed considerable inhibitory activities against MMP-2, MMP-9 and the best selectivity over MMP-1. Preliminary structure–activity relationship analysis indicated that caffeicacidamides with electron-donating groups at para-position of
An efficient asymmetric hydrophosphonylation of unsaturated amides catalyzed by rare-earth metal amides [(Me<sub>3</sub>Si)<sub>2</sub>N]<sub>3</sub>RE(μ-Cl)Li(THF)<sub>3</sub> with phenoxy-functionalized chiral prolinols
作者:Zenghui Fei、Chao Zeng、Chengrong Lu、Bei Zhao、Yingming Yao
DOI:10.1039/c7ra00468k
日期:——
An asymmetric hydrophosphonylation reaction of diethyl phosphite with α,β-unsaturated amides catalyzed by [(Me3Si)2N]3RE(μ-Cl)Li(THF)3 (RE = Sc (1), Y (2), La (3), Yb (4) and Lu (5)) with H2Ln ((S)-2,4-R2-6-[[2-(hydroxydiphenylmethyl)pyrrolidin-1-yl]methyl]phenol) (R = tBu (H2L1); R = 1-cumyl (H2L2) and R = 1-adm (H2L3)) was disclosed. The effects of different central metals and proligands on the addition
亚磷酸二乙酯与[(Me 3 Si)2 N] 3 RE(μ-Cl)Li(THF)3(RE = Sc(1),Y(2), La(3),Yb(4)和Lu(5))与H 2 L n((S)-2,4-R 2 -6-[[[((2-羟基二苯基甲基)吡咯烷-1-基]甲基]苯酚)(R = t Bu(H 2 L 1); R = 1-枯基(H 2 L 2)和R = 1-adm(H 2 L 3))被披露。测试了不同的中心金属和配体对加成反应的影响,发现Sc配合物1和配体H 2 L 2的结合效果最好。使用相对较宽的不饱和酰胺范围,可获得优异的化学收率(高达99%)和良好至高的对映选择性(从73%到89%不等)。还讨论了当前系统中的活跃物种。