CN
Search Within
294985
应用筛选条件
关键词:'294985'
显示 31-50 共 50 条结果 关于 "294985" 范围 论文
Cheng-Kui Pei et al.
Organic & biomolecular chemistry, 10(22), 4355-4361 (2012-05-05)
β-Isocupreidine (β-ICD) catalyzed asymmetric [4 + 2] cycloaddition of β,γ-unsaturated α-ketoesters with allenic esters afforded ester-substituted functionalized dihydropyran derivatives in high yields along with high enantioselectivities under mild conditions.
Wangqing Kong et al.
Organic & biomolecular chemistry, 10(10), 2164-2173 (2012-02-03)
A detailed study on the scope of the efficient PtCl(2)-catalyzed synthesis of carbazoles from 1-(indol-2-yl)-2,3-allenols is described. Through isotopic labeling experiments, it is confirmed that the reaction proceeds through a unique metal carbene intermediate, which undergoes subsequent highly selective 1,2-hydrogen
Bonnie S Watson et al.
Plant physiology, 167(4), 1699-1716 (2015-02-11)
Integrated metabolomics and transcriptomics of Medicago truncatula seedling border cells and root tips revealed substantial metabolic differences between these distinct and spatially segregated root regions. Large differential increases in oxylipin-pathway lipoxygenases and auxin-responsive transcript levels in border cells corresponded to
Benito Alcaide et al.
Chemical communications (Cambridge, England), 49(13), 1282-1284 (2013-01-09)
The divergent gold-catalysed reactivity (C(sp(2))-H versus C(sp(3))-H) of aryloxy-tethered allenes has been uncovered.
Miao Hong et al.
Macromolecular rapid communications, 33(11), 998-1002 (2012-03-14)
Allene groups are first employed as the reactive moiety in the simple and efficient synthesis of well-defined functional polyethylene. By copolymerization of ethylene with allene group substituted norbornene, the allene group is successfully introduced into the polyethylene with a high
T A Volden et al.
Journal of neuroimmune pharmacology : the official journal of the Society on NeuroImmune Pharmacology, 10(4), 655-665 (2015-08-12)
Microglia are resident mononuclear phagocytes within the CNS parenchyma that intimately interact with neurons and astrocytes to remodel synapses and extracellular matrix. We briefly review studies elucidating the molecular pathways that underlie microglial surveillance, activation, chemotaxis, and phagocytosis; we additionally
Stefano Protti et al.
Angewandte Chemie (International ed. in English), 51(34), 8577-8580 (2012-07-19)
Doubly radical: A novel entry to α,n-didehydrotoluene (DHT) diradicals is disclosed and proceeds through the photochemical activation of (chlorobenzyl)trimethylsilanes with chloride loss and elimination of the SiMe(3) (+) group. The products formed in solution are indicative of the intermediacy of
Jakub T Flasz et al.
Organic letters, 14(12), 3024-3027 (2012-06-01)
A new formal total synthesis of (-)-echinosporin has been developed based upon the Padwa [3 + 2]-cycloadditive elimination reaction of allenylsulfone 4 with the D-glucose-derived enone 14 which provides cycloadduct 12.
Kenta Yamamoto et al.
Proceedings of the National Academy of Sciences of the United States of America, 112(19), 6152-6157 (2015-04-29)
Osteoblasts produce calcified bone matrix and contribute to bone formation and remodeling. In this study, we established a procedure to directly convert human fibroblasts into osteoblasts by transducing some defined factors and culturing in osteogenic medium. Osteoblast-specific transcription factors, Runt-related
Chenggang Liu et al.
Plant physiology, 165(4), 1424-1439 (2014-06-21)
In Arabidopsis (Arabidopsis thaliana), the major MYB protein regulating proanthocyanidin (PA) biosynthesis is TT2, named for the transparent testa phenotype of tt2 mutant seeds that lack PAs in their coats. In contrast, the MYB5 transcription factor mainly regulates seed mucilage
Ming Chen et al.
Organic letters, 15(7), 1662-1665 (2013-03-29)
The enantioselective hydroboration of racemic allenylsilane (±)-4 with ((d)Ipc)2BH proceeds via enantiodivergent pathways to give vinylborane 11 and crotylborane intermediate (S)-E-5. Subsequent crotylboration of aldehyde substrates with (S)-E-5 at -78 °C provides (E)-δ-silyl-anti-homoallylic alcohols in 71-89% yield and with 93-96%
Richard B Thompson et al.
Proceedings of the National Academy of Sciences of the United States of America, 112(5), 1565-1570 (2015-01-22)
Accumulation of protein- and lipid-containing deposits external to the retinal pigment epithelium (RPE) is common in the aging eye, and has long been viewed as the hallmark of age-related macular degeneration (AMD). The cause for the accumulation and retention of
Chung-Yeh Wu et al.
Nature, 517(7535), 449-454 (2015-01-23)
Low-valent late transition-metal catalysis has become indispensable to chemical synthesis, but homogeneous high-valent transition-metal catalysis is underdeveloped, mainly owing to the reactivity of high-valent transition-metal complexes and the challenges associated with synthesizing them. Here we report a carbon-carbon bond cleavage
The silyl-cupration and stannyl-cupration of allenes.
Fleming I, et al.
Tetrahedron, 45(2), 413-424 (1989)
Ersan Tatli et al.
Journal of interventional cardiology, 28(3), 305-312 (2015-05-21)
We aimed to present our experience regarding the unusual vascular complications and specific treatment strategies in patients who underwent transradial coronary procedure (TRC). Transradial access provides lower vascular access site complication rates compared with transfemoral access. However, there is lack
Wu Fan et al.
Angewandte Chemie (International ed. in English), 53(52), 14542-14545 (2014-10-30)
A novel copper(I)-catalyzed three-component reaction for the efficient synthesis of 3-amino-2-pyrones and 2,5-dihydrofurans from propargyl alcohols, aldehydes, and amines has been developed. The starting materials are easily available and the scope of this method is broad. Through mechanistic studies, it
Iodine-initiated domino reaction of hepta-1,2-dien-6-yn-4-ols and Brønsted acid promoted cyclization of hepta-1,2,6-trien-4-ols leading to functionalized benzenes.
Yan He et al.
Chemistry, an Asian journal, 8(4), 717-722 (2013-01-23)
Hiyun Kim et al.
Current opinion in drug discovery & development, 11(6), 870-894 (2008-10-24)
Presented is a review of the advances in synthetic methodology that make use of the allene functional group, with emphasis on catalytic asymmetric transformations and new mechanistic insights. The review covers the period from January 2007 to May 2008 and
Guosheng Liu
Organic & biomolecular chemistry, 10(31), 6243-6248 (2012-06-27)
Transition metal catalysts have been developed for introducing fluorine into organic compounds. Recent progress in this area is reviewed with an emphasis on the selective fluorination of alkenes, alkynes and allenes. Regio- and stereoselective fluorination reactions are highlighted.
Keith R Fandrick et al.
Organic letters, 15(6), 1214-1217 (2013-02-27)
A practical and highly site-selective copper-PhBPE-catalyst-controlled allenylation with propargyl boronates has been developed. The methodology has shown to be tolerant of diverse ketones and aldehydes providing the allenyl adducts in high selectivity. The BPE ligand and boronate substituents were shown
2/2