D sc otf 3

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August undefined, 2024

WebSep 18, 2006 · Moreover, the combination of 10 mol % of Sc(OTf) 3 and 20 mol % of Sc(DS) 3 led to desired 7 in almost quantitative yield (entry 8). 21 The other simple nucleophiles were also examined under the condition of 10% Yb(OTf) 3 in H 2 O, and though excellent yield was obtained in the case of 2-methoxypropene as a nucleophile … Web特に、ランタノイド元素の塩（Ln(OTf) 3 (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y)）がルイス酸として有用である。そのほかにも、トリフルオロメタンスルホン酸スカンジウムは、アルドール反応やディールス・アルダー反応のような反応の触媒 …

Sc(OTf)3-catalyzed synthesis of thiosulfonates in ionic …

WebAbstract. Addition of HOTf to a mixture of Co III (BDPP)(O 2 ˙) (1, H 2 BDPP = 2,6-bis((2-(S)-diphenylhydroxylmethyl-1-pyrrolidinyl)methyl)pyridine) and Cp* 2 Fe produced H 2 O 2 in high yield implying formation of Co III (BDPP)(OOH) (3), and reaction of Sc(OTf) 3 with the same mixture gave a peroxo-bridged Co III /Sc III 5.These findings demonstrate the … WebDec 7, 2024 · Here, we report the synthesis of 3,4-disubstituted 1H-pyrazoles and 3,5-disubstituted pyridines from the reaction of epoxides with hydrazine and ammonia, respectively. Both reactions utilize Sc(OTf)3 as a Lewis acid. The pyrazole synthesis utilizes N-bromosuccinimide to convert the intermediate pyrazolines to the pyrazoles, whereas … show me benzara dining room sets

Stereospecific nucleophilic substitution at tertiary and quaternary ...

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"Web50 mol% Sc(OTf) 3 75 mol% t-BuPybox Ph O 1 equiv. benzil (21) h (350 nm) OH O Ph Me Me 26 h 45% yield 89% ee No reaction with chemical reducants or oxidants: Organic triplet sensitizers replicate cycloaddition, albeit with slower rate: OH O Ph Me Me + 20 mol% Sc(OTf) 3 35 mol% t-BuPybox Ru(deeb) " - D sc otf 3

D sc otf 3

Sc(OTf)3-catalyzed synthesis of thiosulfonates in ionic …

Web三氟甲磺酸钪 (III) 99%; CAS Number: 144026-79-9; Synonyms: Sc(OTf)3,三氟甲基磺酸钪,三氟甲磺酸钪(III) 盐; Linear Formula: Sc(SO3CF3)3; find Sigma-Aldrich-418218 … WebStructure, properties, spectra, suppliers and links for: Scandium(III) trifluoromethanesulfonate, 144026-79-9.

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WebAldrich - 425680; Europium(III) trifluoromethanesulfonate 98%; CAS No. 52093-25-1; Europium(III) triflate; catalyst Find related products, papers, technical documents, MSDS & more at Sigma-Aldrich WebNoto Sans Mono CJK SC 字体(字体家族名称:Noto Sans Mono CJK SC;字体样式名称:Regular)，共44806个字符。字符分布范围:基本拉丁文,拉丁文-1补充,拉丁文扩充-A,拉丁文扩充-B,国际音标扩展,空白修饰字母,组合音标附加符号,希腊文和科普特文,西里尔文,谚文字母,拉丁文扩充增补,一般标点符号,上标和下标,货币符号 ...

WebJan 5, 2024 · Modulation of the activity of an acid/base switchable dithiocarbamate RAFT agent, cyanomethyl (4-fluorophenyl)(pyridin-4-yl)carbamodithioate, with the Lewis acid scandium triflate (Sc(OTf)3) was investigated to examine the ability to deliver improved control over RAFT copolymerizations involving both more-activated and less-activated … WebJun 4, 1993 · Y(OTf)3 or Ln(OTf)3 is known to be effective in some Diels-Alder reacdons,s.6) however, only a trace amount of corresponding adduct 1 was obtained in the above reaction. On the other hand, the reaction quite smoothly proceeded to give 1 in the presence of 10 mol% of Sc(OTf)3 (Table 1). 3755 3756 O catalyst (10 mol%) v + >-% …

WebA Sc(OTf)3 catalyzed [3 + 2]-annulation reaction between donor–acceptor aziridines and several exo-glycals has been developed. Using this method, some exo-glycals derived … WebJul 31, 2024 · In a (3+2)-cycloaddition using Sc(OTf) 3 as a Lewis acidic catalyst, the corresponding exocyclic thioenol ethers (2-methylidene tetrahydrothiophenes) were …

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WebMay 5, 2024 · The MNPs-PhSO 3-Sc(OTf) 2 was applied as a magnetically recyclable heterogeneous Lewis acid nanocatalyst for the selective oxidation of a variety of sulfides to sulfoxides using hydrogen peroxide as a green oxidant resulting in 90–98% yields under solvent-free conditions at room temperature. It could also be recovered and reused for at … show me bellyWeb2024年冯小明被授予未来科学大奖物质科学奖，表彰他在发明新催化剂和新反应方面的创造性贡献，为合成有机分子，特别是药物分子提供了新途径 [1-3] 。此外，Roskamp反应，即α-乙酸重氮酯与醛在路易斯酸（Sc(OTf) 3, BF 3, GeCl 2, etc）催化下反应生成β-酮酸酯的 ... show me bennie thompsonWebApr 16, 2024 · Sc (OTf)3-Catalyzed Formal [3 + 3] Cycloaddition Reaction of Diaziridines and Quinones for the Synthesis of Benzo [ e] [1,3,4]oxadiazines Sc (OTf) 3 -Catalyzed … show me ben ten on youtubeWebJul 28, 2024 · Although the complete mechanistic picture has not yet been fully addressed, the authors convincingly proposed an active species B, generated from mixing Sc(OTf) 3, TMSCN and trifluoroacetate. Once B is formed, ionization could lead to the contact ion pair C , that would undergo a nucleophile attack of TMSCN on the planar carbocation at the ... show me best march 2016 iphone 6s dealsWebNoto Serif SC 字体(字体家族名称:Noto Serif SC;字体样式名称:Regular)，共30845个字符。字符分布范围:基本拉丁文,拉丁文-1补充,拉丁文扩充-A,拉丁文扩充-B,国际音标扩展,空白修饰字母,希腊文和科普特文,西里尔文,拉丁文扩充增补,一般标点符号,货币符号,符号用组合附加符号,似字母符号,数字形式,箭头符号 ... show me bermuda grassWebDec 12, 2012 · Download : Download full-size image. Scheme 4. Reuse of the catalyst. In summary, we have developed Sc (OTf) 3 -catalyzed sulfenylation of sodium sulfinates … show me best songWebApr 16, 2024 · A formal [3 + 3] cyclization reaction of diaziridines and quinones has been developed offering 1,3,4-oxadiazinanes in generally high yields (up to 96%). The reaction was catalyzed by Sc(OTf) 3 with a large substrate scope for both diaziridines and quinones. The synergistic activation of 1, … show me beyblade songs